You searched for subject:(Conjugated polymers).
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University of Hong Kong
1.
Tsoi, Ka-wing.
Synthesis of conjugated polymers with pendant metal
complexes and study of their photophysical properties.
Degree: M. Phil., 2014, University of Hong Kong
URL: Tsoi,
K.
[蔡家榮].
(2014).
Synthesis
of
conjugated
polymers
with
pendant
metal
complexes
and
study
of
their
photophysical
properties.
(Thesis).
University
of
Hong
Kong,
Pokfulam,
Hong
Kong
SAR.
Retrieved
from
http://dx.doi.org/10.5353/th_b5351043 
;
http://dx.doi.org/10.5353/th_b5351043
;
http://hdl.handle.net/10722/207997
► A series of copolymers based on poly(phenylene thienylene) mainchain that contains pendent bisterpyridine ruthenium(II) complexes was synthesized by palladium catalyzed Suzuki coupling reaction. The polymers…
(more)
▼ A series of copolymers based on poly(phenylene
thienylene) mainchain that contains pendent bisterpyridine
ruthenium(II) complexes was synthesized by palladium catalyzed
Suzuki coupling reaction. The polymers contain different proportion
of metal complexes. The copolymers exhibit broad absorption band in
the visible region due to the conjugated backbone and the
bisterpyridine ruthenium complexes. The relative intensity of each
absorption band depends on the metal complex contents. There is a
significant spectral overlap between the emission of the conjugated
polymer mainchain and the absorption of the ruthenium complexes. It
was found that there is a quenching of polymer emission by the
complexes. Based on the results obtained by spectroscopic studies,
it is proposed to be Förster type energy transfer process between
the polymer mainchain as the donor and the complexes as the
acceptors.
Two donor-acceptor molecules with pyrazinopyrazine
bridge units were synthesized. They exhibit intramolecular charge
transfer character and were characterized by 1 H NMR, FTIR,
UV-visible absorption and mass spectrometry. The two compounds have
absorption band in the near IR region and exhibit narrow band gap.
Through structural modification, their optical and electronic
properties can be fine tuned. They have potential applications in
organic photovoltaic cells and organic field effect
transistors.
published_or_final_version
Chemistry
Master
Master of Philosophy
Advisors/Committee Members: Chan, WK.
Subjects/Keywords: Conjugated polymers
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APA (6th Edition):
Tsoi, K. (2014). Synthesis of conjugated polymers with pendant metal
complexes and study of their photophysical properties. (Masters Thesis). University of Hong Kong. Retrieved from Tsoi, K. [蔡家榮]. (2014). Synthesis of conjugated polymers with pendant metal complexes and study of their photophysical properties. (Thesis). University of Hong Kong, Pokfulam, Hong Kong SAR. Retrieved from http://dx.doi.org/10.5353/th_b5351043 ; http://dx.doi.org/10.5353/th_b5351043 ; http://hdl.handle.net/10722/207997
Chicago Manual of Style (16th Edition):
Tsoi, Ka-wing. “Synthesis of conjugated polymers with pendant metal
complexes and study of their photophysical properties.” 2014. Masters Thesis, University of Hong Kong. Accessed February 21, 2020.
Tsoi, K. [蔡家榮]. (2014). Synthesis of conjugated polymers with pendant metal complexes and study of their photophysical properties. (Thesis). University of Hong Kong, Pokfulam, Hong Kong SAR. Retrieved from http://dx.doi.org/10.5353/th_b5351043 ; http://dx.doi.org/10.5353/th_b5351043 ; http://hdl.handle.net/10722/207997.
MLA Handbook (7th Edition):
Tsoi, Ka-wing. “Synthesis of conjugated polymers with pendant metal
complexes and study of their photophysical properties.” 2014. Web. 21 Feb 2020.
Vancouver:
Tsoi K. Synthesis of conjugated polymers with pendant metal
complexes and study of their photophysical properties. [Internet] [Masters thesis]. University of Hong Kong; 2014. [cited 2020 Feb 21].
Available from: Tsoi, K. [蔡家榮]. (2014). Synthesis of conjugated polymers with pendant metal complexes and study of their photophysical properties. (Thesis). University of Hong Kong, Pokfulam, Hong Kong SAR. Retrieved from http://dx.doi.org/10.5353/th_b5351043 ; http://dx.doi.org/10.5353/th_b5351043 ; http://hdl.handle.net/10722/207997.
Council of Science Editors:
Tsoi K. Synthesis of conjugated polymers with pendant metal
complexes and study of their photophysical properties. [Masters Thesis]. University of Hong Kong; 2014. Available from: Tsoi, K. [蔡家榮]. (2014). Synthesis of conjugated polymers with pendant metal complexes and study of their photophysical properties. (Thesis). University of Hong Kong, Pokfulam, Hong Kong SAR. Retrieved from http://dx.doi.org/10.5353/th_b5351043 ; http://dx.doi.org/10.5353/th_b5351043 ; http://hdl.handle.net/10722/207997
Louisiana State University
2.
Pangeni, Deepa.
Amplifying Conjugated Polymers for Fluorescent Chemosensing.
Degree: PhD, Chemistry, 2013, Louisiana State University
URL: etd-11142013-162423
;
https://digitalcommons.lsu.edu/gradschool_dissertations/2388
► Chemo- and biosensors based on fluorescent conjugated polymers benefit from greater detection sensitivity due to amplification of the electronic perturbations produced by analyte binding. This…
(more)
▼ Chemo- and biosensors based on fluorescent conjugated polymers benefit from greater detection sensitivity due to amplification of the electronic perturbations produced by analyte binding. This amplification stems from the exciton-transporting properties of conjugated polymers. In the conventional sensor design paradigm, excitons migrate from the bulk of the polymer to the analyte binding sites which can be either fluorescence quenching sites (turn-off sensors) or lower energy fluorophores (turn-on sensors). In this dissertation, we proposed an alternative design paradigm when analyte binding creates a higher energy gap site in the polymer backbone. In the case of isolated polymer chains in dilute solution, these higher energy gap sites act as “roadblocks” for migrating excitons, effectively limiting the exciton migration length. This is responsible for an amplified enhancement of fluorescence of conjugated polymer sensors. As a proof of concept, we utilized this design principle to develop an amplifying turn-on sensor for organophosphorous warfare agents mimics, and demonstrated substantial signal gain and much broader analyte detection range relative to the corresponding small-molecule analogue. In addition, we utilized this novel “higher energy gap” control concept to develop an amplifying fluorescent conjugated polymer sensor for the detection of hydrogen sulfide. This new paradigm expands the generality and universality of the signal amplification concept in conjugated polymers, and can be used to design amplifying turn-on fluorescent sensors for various practically useful analytes. The last part of this dissertation focuses on the conceptual design of near infrared (NIR) conjugated polymers based on cyanine building blocks. We developed a synthetic approach to this class of fluorescent materials which can eventually become useful in biomedical and bioimaging applications.
Subjects/Keywords: Conjugated Polymers
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APA (6th Edition):
Pangeni, D. (2013). Amplifying Conjugated Polymers for Fluorescent Chemosensing. (Doctoral Dissertation). Louisiana State University. Retrieved from etd-11142013-162423 ; https://digitalcommons.lsu.edu/gradschool_dissertations/2388
Chicago Manual of Style (16th Edition):
Pangeni, Deepa. “Amplifying Conjugated Polymers for Fluorescent Chemosensing.” 2013. Doctoral Dissertation, Louisiana State University. Accessed February 21, 2020.
etd-11142013-162423 ; https://digitalcommons.lsu.edu/gradschool_dissertations/2388.
MLA Handbook (7th Edition):
Pangeni, Deepa. “Amplifying Conjugated Polymers for Fluorescent Chemosensing.” 2013. Web. 21 Feb 2020.
Vancouver:
Pangeni D. Amplifying Conjugated Polymers for Fluorescent Chemosensing. [Internet] [Doctoral dissertation]. Louisiana State University; 2013. [cited 2020 Feb 21].
Available from: etd-11142013-162423 ; https://digitalcommons.lsu.edu/gradschool_dissertations/2388.
Council of Science Editors:
Pangeni D. Amplifying Conjugated Polymers for Fluorescent Chemosensing. [Doctoral Dissertation]. Louisiana State University; 2013. Available from: etd-11142013-162423 ; https://digitalcommons.lsu.edu/gradschool_dissertations/2388
Rutgers University
3.
Guo, Fang, 1976-.
Boron-functionalized homo and block copolymers for optoelectronic and sensory applications.
Degree: PhD, Chemistry, 2015, Rutgers University
URL: https://rucore.libraries.rutgers.edu/rutgers-lib/48796/
► Conjugated polymers have been explored as an important class of organic electronics, such as organic light emitting diodes (OLEDs), organic field-effect transistors (OFETs) and organic…
(more)
▼ Conjugated polymers have been explored as an important class of organic electronics, such as organic light emitting diodes (OLEDs), organic field-effect transistors (OFETs) and organic solar cells. With the development of various synthetic methods and characterization techniques, the family of
conjugated polymers have grown to a scope which goes beyond any single discipline. Functionalization of
conjugated organic systems with main group elements represents an active research area of significant interest in the scientific community. One of the most employed elements is the electron-deficient boron that features an empty p orbital that enables the overlap with π orbitals of attached aryl groups. This leads to novel optical and electronic properties for organoborane containing
conjugated polymers. The focus of this thesis is on the investigation of incorporation of organoborane into different
conjugated systems. Chapter 1. Regioregular Organoborane-Functionalized Poly(3-alkynylthiophene)s A series of new alkynylphenylborane-functionalized monomers were synthesized and utilized to prepare regioregular borane acceptor-functionalized polythiophenes rr-P1, rr-P2 using Stille-type polymerization and P1 using Kumada technique. Theoretical calculations on model systems and fluoride anion binding studies confirm the assignment of the lowest energy absorption at ca. 500 nm to the polymer backbone and the higher energy bands at ca. 330-340 nm to a charge transfer state which is localized on the borane moieties. A comparison between polymer P1 and rr-P1 suggests a higher regioregularity which results in significant bathochromic shifts in both absorption and emission spectra. The borane acceptor effect is also reflected in the bathochromic shift of the lower energy absorption maximum of
polymers rr-P1, rr-P2 and rr-P3HT which is envisioned as possible candidates for optical and sensory materials. Chapter 2. Amphiphilic Polythiophene Block Copolymers Containing Phenylboronic Acid Functionality The amphiphilic block copolymers poly (3-hexylthiophene)-block-polystyrene boronic acid (P3HT-b-PSBA) and poly (3-hexylthiophene)-block-poly (4-vinylpyridine-stat-styrene boronic acid) (P3HT-b-P(4VP-stat-SBA) are prepared using a combination of Grignard metathesis (GRIM), controlled radical polymerization (CRP) and click chemistry. This
polymers represent a new type amphiphilic polythiophene block copolymers containing boronic acid-functionality for potential applications in material chemistry. Chapter 3. The First 1, 2-azaborine Polymer With a collaborative effort with Prof. Liu’s group (Boston College) who provided Bpin/Br-functionalized AB-type monomers and regioregular model compounds, we incorporated monocyclic 1,2-azaborine into extended π-
conjugated systems using the Suzuki-Miyaura polymerization technique. Though the polymer main chain is isoelectronic to poly (paraphenylene), photophysical and computational studies indicate a closer similarity to polyacetylene which indicates promising applications as a new…
Advisors/Committee Members: Jäkle, Frieder (chair), Pietrangelo, Agostino (internal member), Sheridan, John (internal member), Hu, Qiao-Sheng (outside member).
Subjects/Keywords: Conjugated polymers
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APA (6th Edition):
Guo, Fang, 1. (2015). Boron-functionalized homo and block copolymers for optoelectronic and sensory applications. (Doctoral Dissertation). Rutgers University. Retrieved from https://rucore.libraries.rutgers.edu/rutgers-lib/48796/
Chicago Manual of Style (16th Edition):
Guo, Fang, 1976-. “Boron-functionalized homo and block copolymers for optoelectronic and sensory applications.” 2015. Doctoral Dissertation, Rutgers University. Accessed February 21, 2020.
https://rucore.libraries.rutgers.edu/rutgers-lib/48796/.
MLA Handbook (7th Edition):
Guo, Fang, 1976-. “Boron-functionalized homo and block copolymers for optoelectronic and sensory applications.” 2015. Web. 21 Feb 2020.
Vancouver:
Guo, Fang 1. Boron-functionalized homo and block copolymers for optoelectronic and sensory applications. [Internet] [Doctoral dissertation]. Rutgers University; 2015. [cited 2020 Feb 21].
Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/48796/.
Council of Science Editors:
Guo, Fang 1. Boron-functionalized homo and block copolymers for optoelectronic and sensory applications. [Doctoral Dissertation]. Rutgers University; 2015. Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/48796/
UCLA
4.
Thompson, Robert James.
Synthesis and Characterization of Novel Conjugated Polymers and Small Molecules for Photovoltaic Applications.
Degree: Chemistry, 2017, UCLA
URL: http://www.escholarship.org/uc/item/7ph9v01m
► This dissertation describes the synthesis and characterization of several novel conjugated polymers and small molecules for use in research on organic photovoltaics (i.e. polymer solar…
(more)
▼ This dissertation describes the synthesis and characterization of several novel conjugated polymers and small molecules for use in research on organic photovoltaics (i.e. polymer solar cells/organic solar cells). Chapter 1 is an introductory chapter that briefly introduces semiconducting polymers and gives a brief overview of their use in polymer solar cells.Chapter 2 describes the synthesis and characterization of the conjugated polyelectrolyte, poly{(4,4-bis(3’-(N-ethyl-N,N-dimethylammonio)propyl)cyclopenta[2,1-b:3,4-b']dithiophene)-2,6-diyl-alt-(thiophene-2,5-diyl)} bromide (PCT). Chapter 3 describes the synthesis and characterization of a series of conjugated polymers containing substituted dithieno[3,2-a:2',3'-c]phenazine monomer units, and also describes the fabrication and analysis of solar cells devices made from these materials.Chapter 4 describes the synthesis and characterization of a series of conjugated polymers and small molecules based on the condensation of various aromatic o-diamines with o-diketones to produce novel N-heteroacenes.Chapter 5 gives a brief review of the work reported in this dissertation and provides suggestions for future work that can be built on those findings.
Subjects/Keywords: Chemistry; Conjugated Polymers; Heteroacenes; Photovoltaics
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APA (6th Edition):
Thompson, R. J. (2017). Synthesis and Characterization of Novel Conjugated Polymers and Small Molecules for Photovoltaic Applications. (Thesis). UCLA. Retrieved from http://www.escholarship.org/uc/item/7ph9v01m
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Thompson, Robert James. “Synthesis and Characterization of Novel Conjugated Polymers and Small Molecules for Photovoltaic Applications.” 2017. Thesis, UCLA. Accessed February 21, 2020.
http://www.escholarship.org/uc/item/7ph9v01m.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Thompson, Robert James. “Synthesis and Characterization of Novel Conjugated Polymers and Small Molecules for Photovoltaic Applications.” 2017. Web. 21 Feb 2020.
Vancouver:
Thompson RJ. Synthesis and Characterization of Novel Conjugated Polymers and Small Molecules for Photovoltaic Applications. [Internet] [Thesis]. UCLA; 2017. [cited 2020 Feb 21].
Available from: http://www.escholarship.org/uc/item/7ph9v01m.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Thompson RJ. Synthesis and Characterization of Novel Conjugated Polymers and Small Molecules for Photovoltaic Applications. [Thesis]. UCLA; 2017. Available from: http://www.escholarship.org/uc/item/7ph9v01m
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
McMaster University
5.
Liang, Shuai.
Reversible Functionalization of Single-Walled Carbon Nanotubes by Switchable Conjugated Polymers.
Degree: PhD, 2017, McMaster University
URL: http://hdl.handle.net/11375/22070
► Single-walled carbon nanotubes (SWNTs), since their first discovery in early 1990s, have drawn enormous research attention owing to their extraordinary properties. These excellent optical, electrical,…
(more)
▼ Single-walled carbon nanotubes (SWNTs), since their first discovery in early 1990s, have drawn enormous research attention owing to their extraordinary properties. These excellent optical, electrical, thermal and mechanical properties have enabled SWNTs to make profound impacts in the field of nanotechnology, which includes nanoscale nanoelectronics, chemo-/biosensors, photovoltaics, drug delivery, and advanced nanocomposite materials. However, the as-produced SWNT samples contain a mixture of metallic and semiconducting SWNTs, amorphous carbon, and metal catalyst particles. Also, due to π-π stacking and van der Waals forces, pristine SWNTs tend to form bundles, making them insoluble in most of organic solvents. The poor processibility and purity hinder the direct use of as-produced SWNTs as the material for fabrication of SWNT-based devices. Therefore, the post-synthesis purification is highly required. Conjugated polymers have proven to be efficient SWNT dispersants, but after solution processing, conjugated polymers adhered to the sidewall of SWNTs can not be easily removed and thus negatively affect the performance of the resulting SWNT-based electronic devices. Therefore, polymers that can dissociate from the surface of SWNTs after solution processing is highly desirable.
Apart from the introduction to several other efficient purification methods of SWNTs, Chapter 1 also gives a brief review on reversible functionalization of SWNTs by polymers. The work reported in the literature categorized by the different external stimuli used to reverse the polymer-SWNT association. Chapter 2 describes the design and synthesis of a vinylogous tetrathiafulvalene (TTFV)-based conjugated polymer, which is responsive to pH changes and thus realized reversible functionalization of SWNTs. Chapter 3 describes the design and synthesis of dithiafulvenyl-grafted phenylene ethynylene polymers, which can reversibly interact with SWNTs by changing solvents. Chapter 4 describes the design and synthesis of dithiafulvene (DTF)-based electron-rich conjugated polymers, which can selectively bind with semiconducting SWNTs. In addition, Chapter 5 describes the use of SEC to achieve high-resolution separation, and isolation of surfactant-free metallic and semiconducting SWNTs. This allowed us to study the competition behavior when different ratios of metallic and semiconducting nanotubes are used as the starting material for polymer dispersions. Finally, Chapter 6 describes a side project that involves covalent functionalization of GO using Piers-Rubinsztajn reaction. The functionalized GO is loaded into silicone elastomer to reduce the air permeability and enhance the mechanical strength of the resulting silicone elastomer.
Thesis
Doctor of Philosophy (PhD)
Advisors/Committee Members: Adronov, Alex, Chemistry.
Subjects/Keywords: Conjugated Polymers; Carbon Naonotubes
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APA (6th Edition):
Liang, S. (2017). Reversible Functionalization of Single-Walled Carbon Nanotubes by Switchable Conjugated Polymers. (Doctoral Dissertation). McMaster University. Retrieved from http://hdl.handle.net/11375/22070
Chicago Manual of Style (16th Edition):
Liang, Shuai. “Reversible Functionalization of Single-Walled Carbon Nanotubes by Switchable Conjugated Polymers.” 2017. Doctoral Dissertation, McMaster University. Accessed February 21, 2020.
http://hdl.handle.net/11375/22070.
MLA Handbook (7th Edition):
Liang, Shuai. “Reversible Functionalization of Single-Walled Carbon Nanotubes by Switchable Conjugated Polymers.” 2017. Web. 21 Feb 2020.
Vancouver:
Liang S. Reversible Functionalization of Single-Walled Carbon Nanotubes by Switchable Conjugated Polymers. [Internet] [Doctoral dissertation]. McMaster University; 2017. [cited 2020 Feb 21].
Available from: http://hdl.handle.net/11375/22070.
Council of Science Editors:
Liang S. Reversible Functionalization of Single-Walled Carbon Nanotubes by Switchable Conjugated Polymers. [Doctoral Dissertation]. McMaster University; 2017. Available from: http://hdl.handle.net/11375/22070
Georgia Tech
6.
Schmatz, Brian J.
Processing Components in π-Conjugated Polymers: Controlling Solubility, Morphology, and Functionality through Structural Design.
Degree: PhD, Chemistry and Biochemistry, 2018, Georgia Tech
URL: http://hdl.handle.net/1853/61632
► Over the past 30 years conjugated polymers have demonstrated performance strides in solution-printed photovoltaics, transistors, displays, and sensors. With fundamental structure-property relationships in place, the…
(more)
▼ Over the past 30 years
conjugated polymers have demonstrated performance strides in solution-printed photovoltaics, transistors, displays, and sensors. With fundamental structure-property relationships in place, the next step is to prepare these materials for use in large-scale, high-throughput printing facilities where reproducibility, tolerance to the environment, safety, and sustainability will all play a pivotal role in the ultimate success of
conjugated polymer based electronics. This dissertation explores how to achieve that next step through the use of processing components, or structural moieties that embed a desired processing property.
Chapter 1 provides an introduction to the design, fundamental properties, and methods of processing soluble
conjugated polymers, placing specific emphasis on the interplay between molecular structure, processability, and ultimately performance. Polymer synthesis, characterization, and processing methodology unique to this dissertation are presented in detail in Chapter 2. Chapter 3 describes the use of triphenylamine as a processing comonomer in dioxythiophene
polymers. The triphenylamine comonomer templates an amorphous thin-film morphology by embedding backbone torsion and conjugation breaks, providing reproducible films that are tolerant to fluctuations in processing conditions. Chapter 4 explores the use of polymer side chains with multiple functionalities, or multistage side chains, to control solubility for aqueous printable
conjugated polymers. Finally, Chapter 5 delves into the intricate morphological effects of polymer side chain placement in organic photovoltaic donor-acceptor blends. Specifically, the study utilizes a novel family of donor-acceptor
polymers with methylated acceptor monomers to observe how side chain steric interactions affect morphology and optoelectronic properties in blends of polymeric donors and molecular acceptors.
Advisors/Committee Members: Reynolds, John R (advisor), Reichmanis, Elsa (advisor), Collard, David M (advisor), Lin, Zhiqun (advisor), Gutekunst, Will R (committee member).
Subjects/Keywords: Conjugated Polymers; Organic Electronics
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APA (6th Edition):
Schmatz, B. J. (2018). Processing Components in π-Conjugated Polymers: Controlling Solubility, Morphology, and Functionality through Structural Design. (Doctoral Dissertation). Georgia Tech. Retrieved from http://hdl.handle.net/1853/61632
Chicago Manual of Style (16th Edition):
Schmatz, Brian J. “Processing Components in π-Conjugated Polymers: Controlling Solubility, Morphology, and Functionality through Structural Design.” 2018. Doctoral Dissertation, Georgia Tech. Accessed February 21, 2020.
http://hdl.handle.net/1853/61632.
MLA Handbook (7th Edition):
Schmatz, Brian J. “Processing Components in π-Conjugated Polymers: Controlling Solubility, Morphology, and Functionality through Structural Design.” 2018. Web. 21 Feb 2020.
Vancouver:
Schmatz BJ. Processing Components in π-Conjugated Polymers: Controlling Solubility, Morphology, and Functionality through Structural Design. [Internet] [Doctoral dissertation]. Georgia Tech; 2018. [cited 2020 Feb 21].
Available from: http://hdl.handle.net/1853/61632.
Council of Science Editors:
Schmatz BJ. Processing Components in π-Conjugated Polymers: Controlling Solubility, Morphology, and Functionality through Structural Design. [Doctoral Dissertation]. Georgia Tech; 2018. Available from: http://hdl.handle.net/1853/61632
Georgia Tech
7.
Jagtap, Subodh Prakash.
Design and synthesis of and π-stacked conjugated oligomers and polymers.
Degree: PhD, Chemistry and Biochemistry, 2012, Georgia Tech
URL: http://hdl.handle.net/1853/47574
► Interchain interactions between π-systems have a strong effect on the properties of conjugated organic materials that find application in devices such as light emitting diodes…
(more)
▼ Interchain interactions between π-systems have a strong effect on the properties of
conjugated organic materials that find application in devices such as light emitting diodes (OLEDs), organic photovoltaics (OPVs), and field effect transistors (FETs). We have prepared covalently-stacked oligo(1,4-phenylene ethynylene)s and oligo(1,4-phenylene vinylene)s to study the influence of chain-chain interactions on the electronic structure of closely packed
conjugated units. These serve as models for segments of
conjugated materials in thin film devices. Extension of this concept has allowed us to prepare multi-tiered systems that display the influence of pi-stacking. The stacked architectures were prepared by multi-step synthesis of the scaffolds, followed by metal-catalyzed cross coupling reactions (Sonogashira, Heck, Suzuki couplings) to incorporate the
conjugated oligomers. The optical and electrochemical properties of these stacked compounds and
polymers were compared to their unstacked linear counterparts. These studies provide a platform for the exploration of the nature of charge carriers and excitons in a broad class of materials that have significant potential in addressing challenges in power generation, lighting and electronics.
Advisors/Committee Members: Collard, David (Committee Chair), Beckham, Haskell (Committee Member), France, Stefan (Committee Member), Srinivasarao, Mohan (Committee Member), Tolbert, Laren (Committee Member).
Subjects/Keywords: Stacking; Conjugated materials; Semiconducting; Organic electronics; Electronic polymers; Semiconductors; Organic semiconductors; Conjugated polymers; Conducting polymers
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APA (6th Edition):
Jagtap, S. P. (2012). Design and synthesis of and π-stacked conjugated oligomers and polymers. (Doctoral Dissertation). Georgia Tech. Retrieved from http://hdl.handle.net/1853/47574
Chicago Manual of Style (16th Edition):
Jagtap, Subodh Prakash. “Design and synthesis of and π-stacked conjugated oligomers and polymers.” 2012. Doctoral Dissertation, Georgia Tech. Accessed February 21, 2020.
http://hdl.handle.net/1853/47574.
MLA Handbook (7th Edition):
Jagtap, Subodh Prakash. “Design and synthesis of and π-stacked conjugated oligomers and polymers.” 2012. Web. 21 Feb 2020.
Vancouver:
Jagtap SP. Design and synthesis of and π-stacked conjugated oligomers and polymers. [Internet] [Doctoral dissertation]. Georgia Tech; 2012. [cited 2020 Feb 21].
Available from: http://hdl.handle.net/1853/47574.
Council of Science Editors:
Jagtap SP. Design and synthesis of and π-stacked conjugated oligomers and polymers. [Doctoral Dissertation]. Georgia Tech; 2012. Available from: http://hdl.handle.net/1853/47574
University of Alberta
8.
Kang, Le.
A Novel Synthetic Route Towards Conjugated Polymers for
Photovoltaic Materials via Metallacycle Transfer.
Degree: MS, Department of Chemistry, 2012, University of Alberta
URL: https://era.library.ualberta.ca/files/kw52j840j
► Conjugated polymers are actively studied as photovoltaic materials in bulk heterojunction solar cell devices. Five-membered heterocycles, typically thiophene and its derivatives, are the most common…
(more)
▼ Conjugated polymers are actively studied as
photovoltaic materials in bulk heterojunction solar cell devices.
Five-membered heterocycles, typically thiophene and its
derivatives, are the most common building units in these polymers.
However, conjugated polymers containing inorganic elements other
than sulfur have received less research attention due to associated
synthetic difficulties, even though incorporation of main group
elements (such as selenium) has led to improved power conversion
efficiency relative to thiophene-based polymers. Zirconium-mediated
metallacycle transfer chemistry developed by Fagan et al. provides
an easy access to obtain a series of main group heterocycles. Our
goal is to apply this metallacycle transfer chemistry towards
polymer synthesis and develop a synthetic route to prepare polymers
whose band gaps can be tunable by incorporating various main group
elements. The work described in this Thesis involves the use of
metallacycle transfer chemistry to prepare conjugated hybrid
thiophene-selenophene polymers for future application as
photovoltaic materials.
Subjects/Keywords: Conjugated polymers; Metallacycle transfer; Photovoltaic materials
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Manager
APA (6th Edition):
Kang, L. (2012). A Novel Synthetic Route Towards Conjugated Polymers for
Photovoltaic Materials via Metallacycle Transfer. (Masters Thesis). University of Alberta. Retrieved from https://era.library.ualberta.ca/files/kw52j840j
Chicago Manual of Style (16th Edition):
Kang, Le. “A Novel Synthetic Route Towards Conjugated Polymers for
Photovoltaic Materials via Metallacycle Transfer.” 2012. Masters Thesis, University of Alberta. Accessed February 21, 2020.
https://era.library.ualberta.ca/files/kw52j840j.
MLA Handbook (7th Edition):
Kang, Le. “A Novel Synthetic Route Towards Conjugated Polymers for
Photovoltaic Materials via Metallacycle Transfer.” 2012. Web. 21 Feb 2020.
Vancouver:
Kang L. A Novel Synthetic Route Towards Conjugated Polymers for
Photovoltaic Materials via Metallacycle Transfer. [Internet] [Masters thesis]. University of Alberta; 2012. [cited 2020 Feb 21].
Available from: https://era.library.ualberta.ca/files/kw52j840j.
Council of Science Editors:
Kang L. A Novel Synthetic Route Towards Conjugated Polymers for
Photovoltaic Materials via Metallacycle Transfer. [Masters Thesis]. University of Alberta; 2012. Available from: https://era.library.ualberta.ca/files/kw52j840j
NSYSU
9.
Mao, Bo-Han.
Supramolecular design to emerging functions through DNA-like multiple hydrogen-bonding interactions.
Degree: Master, Materials and Optoelectronic Science, 2017, NSYSU
URL: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0731117-111952
► Supramolecular chemistry is a powerful strategy for molecular design due to simple molecular recognition, self-assembly behaviors, a relatively low cost to develop new features of…
(more)
▼ Supramolecular chemistry is a powerful strategy for molecular design due to simple molecular recognition, self-assembly behaviors, a relatively low cost to develop new features of the material. In this study, we prepared the carbazole as the main structure, and polymerized
conjugated polymer at 3,6 position, the other is PS-derivatives. After post-functionalization with CuAAC âclickâ reaction, nucleobase-contained
polymers PTC-TãPVBAãPS-b-PVBA and PS-b-PVBT. The supramolecular complexes through Hetero-complementary hydrogen bonding between Adenine and Thymine were investigated. FT-IR, 1H NMR confirmed the chemical structure of polymer. We demonstrate thermal stability of polymer which has hydrogen bonding by DSC, and explore the homogeneous phase. This binary blend system is able to form a miscible phase and supramolecular network structures due to the strong complementary multiple hydrogen bonding interactions between the A and T units. We also observe the ordered morphology of polymer through transmission electron microscopy(TEM). Finally, we investigated by UV-Vis spectroscopy and fluorescence spectroscopy (PL) which the effects of hydrogen bonding on the properties of materials.
Advisors/Committee Members: Shiao-Wei Kuo (committee member), Jin-Long Hong (chair), Chih-Feng Wang (chair), Yeo-Wan Chiang (chair).
Subjects/Keywords: Conjugated polymers; Molecular recognition; Hydrogen bonding; Supramolecules
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APA (6th Edition):
Mao, B. (2017). Supramolecular design to emerging functions through DNA-like multiple hydrogen-bonding interactions. (Thesis). NSYSU. Retrieved from http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0731117-111952
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Mao, Bo-Han. “Supramolecular design to emerging functions through DNA-like multiple hydrogen-bonding interactions.” 2017. Thesis, NSYSU. Accessed February 21, 2020.
http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0731117-111952.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Mao, Bo-Han. “Supramolecular design to emerging functions through DNA-like multiple hydrogen-bonding interactions.” 2017. Web. 21 Feb 2020.
Vancouver:
Mao B. Supramolecular design to emerging functions through DNA-like multiple hydrogen-bonding interactions. [Internet] [Thesis]. NSYSU; 2017. [cited 2020 Feb 21].
Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0731117-111952.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Mao B. Supramolecular design to emerging functions through DNA-like multiple hydrogen-bonding interactions. [Thesis]. NSYSU; 2017. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0731117-111952
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of New Mexico
10.
Wise, Adam.
Spectroscopic exploration of conformal heterogeneity in an amorphous polyphenylene-vinylene derivative.
Degree: Nanoscience and Microsystems, 2013, University of New Mexico
URL: http://hdl.handle.net/1928/22079
► Photoluminescence and Resonant Raman spectroscopy were performed on the conjugated polymer MDMO-PPV (Poly[2-methoxy-5-(3\u2032,7\u2032-dimethyloctyloxy)-1,4-phenylenevinylene]), both in its pure form and in blends with electron acceptors, in…
(more)
▼ Photoluminescence and Resonant Raman spectroscopy were performed on the
conjugated polymer MDMO-PPV (Poly[2-methoxy-5-(3\u2032,7\u2032-dimethyloctyloxy)-1,4-phenylenevinylene]), both in its pure form and in blends with electron acceptors, in order to understand how conformations are affected by interactions with neighboring polymer chains and small molecules. Thermal and solvent annealing are used to tune these interactions, and the resulting changes in the electronic structure and processes of the polymer are inferred through interpretation of spectroscopic signatures. Optical absorption and emission spectra were measured for MDMO-PPV in several solvents, in thin films processed under various conditions, and in nanoparticle form. These different environments and processing conditions can encourage the polymer to coil (bad solvent), extend (good solvent), strongly interact with neighboring molecules (nanoparticles), or interact weakly (dilute solution), and feature the polymer in a more glassy (spin-cast) or more ordered (thermally annealed) state. We can then interrogate a defind conformation of the polymer, and correlate the spectroscopic and structural changes. Analysis of the lineshape parameters of emission and absorption spectra reveal a relationship between the intensity and spacing of vibronic sidebands, and planarity of the
conjugated backbone. Planarity is extremely important in
conjugated polymers, as it defines the extent of electron delocalization and has serious consequences on every electronic process in the polymer. As well, solvatochromic shifts in the emission spectrum reveal information about the relative polarities of the ground and excited states. Resonant Raman spectroscopy was used to identify the vibrational modes coupled to electronic excitation, and mode-specific displacements were estimated by modeling the photoluminescence spectra using a time-dependent quantum mechanical simulation to reproduce experimental observations. Coupling of electronic processes to vibrational modes in organic photovoltaics both helps and hinders function. It broadens absorption and emission spectra, increasing the ability to absorb light and transport energy, but can provide a structural barrier to some electronic processes. However, here we use it to investigate changes in the planarity of a
conjugated polymer. Spectra of polymer/C60 blend films show increased displacement of a symmetry-forbidden out-of-plane vibrational mode with increasing fullerene doping, indicating a loss of planarity. We also use photoluminescence spectroscopy to confirm this, as the electronic origin of emission blue-shifts with fullerene loading which indicates decreased conjugation length and thus molecular planarity. Ground state charge transfer complexes of MDMO-PPV and several electron acceptors were studied using linear absorption and Resonant Raman spectroscopy to better understand the nuclear rearrangements that the polymer undergoes upon loss of an electron. Any bonds displaced upon the movement of charge will make it…
Advisors/Committee Members: Grey, John, Qin, Yang, Malloy, Kevin, Dunlap, David.
Subjects/Keywords: Conjugated polymers – Conformational analysis.; Raman spectroscopy.
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APA (6th Edition):
Wise, A. (2013). Spectroscopic exploration of conformal heterogeneity in an amorphous polyphenylene-vinylene derivative. (Doctoral Dissertation). University of New Mexico. Retrieved from http://hdl.handle.net/1928/22079
Chicago Manual of Style (16th Edition):
Wise, Adam. “Spectroscopic exploration of conformal heterogeneity in an amorphous polyphenylene-vinylene derivative.” 2013. Doctoral Dissertation, University of New Mexico. Accessed February 21, 2020.
http://hdl.handle.net/1928/22079.
MLA Handbook (7th Edition):
Wise, Adam. “Spectroscopic exploration of conformal heterogeneity in an amorphous polyphenylene-vinylene derivative.” 2013. Web. 21 Feb 2020.
Vancouver:
Wise A. Spectroscopic exploration of conformal heterogeneity in an amorphous polyphenylene-vinylene derivative. [Internet] [Doctoral dissertation]. University of New Mexico; 2013. [cited 2020 Feb 21].
Available from: http://hdl.handle.net/1928/22079.
Council of Science Editors:
Wise A. Spectroscopic exploration of conformal heterogeneity in an amorphous polyphenylene-vinylene derivative. [Doctoral Dissertation]. University of New Mexico; 2013. Available from: http://hdl.handle.net/1928/22079
University of Rochester
11.
Rajarshi, Chakraborty.
Resolving puzzles in conjugated polymer photophysics:
nanoseconds to microseconds.
Degree: PhD, 2017, University of Rochester
URL: http://hdl.handle.net/1802/32857
► Conjugated polymers are active candidates of research for their potential applications in organic electronic devices. This thesis contains experimental results of the photophysical behaviour of…
(more)
▼ Conjugated polymers are active candidates of
research for their potential applications in
organic electronic
devices. This thesis contains experimental results of the
photophysical
behaviour of
Poly[2-methoxy-5-(2-ethylhexyloxy)-1,4-phenylenevinylene]
(MEH-PPV)
in the nanoseconds timescale. It is generally accepted
that quantum yield of films are less
than their solution
counterparts and has a non-exponential “temporal tail” in the
decay
dynamics. This thesis reports the spectroscopy, excitation
wavelength dependence,
temperature dependence and electric field
quenching of the temporal tail of the
photoluminescence in MEH-PPV
on a nanosecond timescale. We try to understand if a
correlation
exists between the “temporal tail” and quantum yield in films. We
conclude
that the tail represents emission from H-like aggregated
regions in the polymer. Using a
simple model of the photophysics,
we estimate the formation yield of the aggregates
responsible for
the tail emission and conclude that they cannot account for the
large
reduction in fluorescence observed in densely packed films
relative to that in solution.
If recombination of injected charges
in an OLED follows quantum spin statistics and all
recombination
forms the lowest excited states in a spin manifold, then the ratio
of formed
singlet to triplet exciton would be 1:3 setting an
efficiency limit of 25% to the EL
emission. However, in conjugated
polymers, various studies have reported the formation
ratio of
singlet to triplet excitons to be greater than 1:3. These results
have ambiguity due
to issues of magnetoresistance, TTA, charge
trapping, outcoupling etc. We try to reexamine
the singlet-triplet
branching ratio in Poly[(9,9-di-n-octylfluorenyl-2,7-diyl)-alt-
(benzo [2,1,3] thiadiazol-4,8-diyl) (F8BT) along with MEH-PPV with
the hope of
circumventing these problems. This approach involves
simultaneous detection of singlet
and triplet state luminescence
and then estimate the recombination branching ratios
directly from
the change in singlet and triplet signals produced by applying
magnetic
fields. The role of PP in F8BT films are addressed based
on studying the effect of
external magnetic field on the DF and
triplet signals of gold nanoparticle doped films.
This work is
unique and important because it includes a delay dependent magnetic
field
effect study of the DF suggesting that spin randomization of
charge pairs is a fast process
that occurs on the several hundred
nanoseconds time scale. The magnetic field effect on
the
fluorescence persists to tens of microseconds and we argue that
this apparent
inconsistency implies the existence of an
intermediate state in the recombination process
that has
implications for measurements and theoretical treatments of the
singlet
recombination fraction in electroluminescent conjugated
polymers.
Subjects/Keywords: Conjugated polymers; Excitons; Organic electronics; Polarons
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APA ·
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CSE |
Export
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Manager
APA (6th Edition):
Rajarshi, C. (2017). Resolving puzzles in conjugated polymer photophysics:
nanoseconds to microseconds. (Doctoral Dissertation). University of Rochester. Retrieved from http://hdl.handle.net/1802/32857
Chicago Manual of Style (16th Edition):
Rajarshi, Chakraborty. “Resolving puzzles in conjugated polymer photophysics:
nanoseconds to microseconds.” 2017. Doctoral Dissertation, University of Rochester. Accessed February 21, 2020.
http://hdl.handle.net/1802/32857.
MLA Handbook (7th Edition):
Rajarshi, Chakraborty. “Resolving puzzles in conjugated polymer photophysics:
nanoseconds to microseconds.” 2017. Web. 21 Feb 2020.
Vancouver:
Rajarshi C. Resolving puzzles in conjugated polymer photophysics:
nanoseconds to microseconds. [Internet] [Doctoral dissertation]. University of Rochester; 2017. [cited 2020 Feb 21].
Available from: http://hdl.handle.net/1802/32857.
Council of Science Editors:
Rajarshi C. Resolving puzzles in conjugated polymer photophysics:
nanoseconds to microseconds. [Doctoral Dissertation]. University of Rochester; 2017. Available from: http://hdl.handle.net/1802/32857
Virginia Tech
12.
Kaur, Manpreet.
Dual Spin-Cast Thermally Interdiffused Polymeric Photovoltaic Devices.
Degree: PhD, Physics, 2011, Virginia Tech
URL: http://hdl.handle.net/10919/77159
► An in depth study of the performance of thermally interdiffused concentration gradient polymer photovoltaic devices is carried out with particular attention to the effect of…
(more)
▼ An in depth study of the performance of thermally interdiffused concentration gradient polymer photovoltaic devices is carried out with particular attention to the effect of the thickness and the thermal treatments on the power conversion efficiency, short circuit current, open circuit voltage and other key electrical properties. Bilayer films of sequentially spin-cast donor and acceptor materials are exposed to various heat treatments in order to induce the interdiffusion. The depth profiles show concentration gradients in the donor and acceptor as a result of interdiffusion and these devices show an order of magnitude increase in the device performance compared to the bilayer devices. Dual spin-cast poly (3-octylthiophene-2,5-diyl) (P3OT)- [6,6] phenyl C61 butyric acid methyl ester (PCBM) and poly (3-hexylthiophene-2,5-diyl) (P3HT)-PCBM interdiffused devices are studied in detail by varying the thickness of the donor and acceptor layers as well as the annealing conditions for initial polymer layer and the time and temperature of the interdiffusion process.
Auger spectroscopy and X-ray photoelectron spectroscopy along with ion beam milling are used to investigate the concentration gradient formed as a result of the interdiffusion. The sulfur signal present in the P3OT and P3HT backbone is detected to identify the concentration profiles in the P3OT-PCBM and P3HT-PCBM devices. The interdiffusion conditions and thickness of the active layers have been optimized to obtain the highest power conversion efficiency. The best device performance of the P3OT-PCBM interdiffused devices is achieved when the interdiffusion is carried out at 150°C for 20 minutes and the P3OT thickness is maintained at 70 nm and the PCBM thickness at 40-50 nm. The highest efficiency achieved for P3OT-PCBM interdiffused devices is 1.0% under AM1.5G solar simulated spectrum.
In order to further increase the efficiency, P3OT is replaced by (P3HT) which has higher hole mobility. P3HT- PCBM based concentration gradient devices show improved device performance over P3OT-PCBM devices. Power conversion efficiency of the order of ~3.0% is obtained for P3HT-PCBM interdiffused devices when the interdiffusion is carried out at 150°C for 20 minutes. For both P3OT:PCBM and P3HT:PCBM devices, the optimum performance occurs when the concentration gradient extends across the entire film and is correlated with an increase in the short circuit current density and fill factor as well as a decrease in the series resistance. The results demonstrate that an interdiffused bilayer fabrication approach is a novel and efficient approach for fabrication of polymer solar cell devices.
In addition, porphyrin derivative 5, 10, 15, 20-Tetraphenyl-21H, 23H-porphine zinc (ZnTPP) is studied as a new donor material for organic solar cells. ZnTPP: PCBM blend devices are investigated in detail by varying the weight ratio of the donor and acceptor materials in blend devices. The devices with ZnTPP: PCBM in 1:9 ratios showed the best device performance and the efficiency of the order of…
Advisors/Committee Members: Heflin, James Randy (committeechair), Davis, Richey M. (committee member), Dorn, Harry C. (committee member), Heremans, Jean J. (committee member).
Subjects/Keywords: Conjugated Polymers; Interdiffusion; Concentration Gradient; Organic Photovoltaics
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APA (6th Edition):
Kaur, M. (2011). Dual Spin-Cast Thermally Interdiffused Polymeric Photovoltaic Devices. (Doctoral Dissertation). Virginia Tech. Retrieved from http://hdl.handle.net/10919/77159
Chicago Manual of Style (16th Edition):
Kaur, Manpreet. “Dual Spin-Cast Thermally Interdiffused Polymeric Photovoltaic Devices.” 2011. Doctoral Dissertation, Virginia Tech. Accessed February 21, 2020.
http://hdl.handle.net/10919/77159.
MLA Handbook (7th Edition):
Kaur, Manpreet. “Dual Spin-Cast Thermally Interdiffused Polymeric Photovoltaic Devices.” 2011. Web. 21 Feb 2020.
Vancouver:
Kaur M. Dual Spin-Cast Thermally Interdiffused Polymeric Photovoltaic Devices. [Internet] [Doctoral dissertation]. Virginia Tech; 2011. [cited 2020 Feb 21].
Available from: http://hdl.handle.net/10919/77159.
Council of Science Editors:
Kaur M. Dual Spin-Cast Thermally Interdiffused Polymeric Photovoltaic Devices. [Doctoral Dissertation]. Virginia Tech; 2011. Available from: http://hdl.handle.net/10919/77159
13.
Jadhav, Kedar Girish.
Synthesis of Monomers for New Conjugated Polymers.
Degree: MS, Chemistry, 2012, University of Massachusetts
URL: https://scholarworks.umass.edu/theses/753
► ABSTRACT SYNTHESIS OF MONOMERS FOR NEW CONJUGATED POLYMERS This dissertation addresses the problem of synthesis of different monomers for donor and acceptor polymers in…
(more)
▼ ABSTRACT
SYNTHESIS OF MONOMERS FOR NEW
CONJUGATED POLYMERS
This dissertation addresses the problem of synthesis of different monomers for donor and acceptor
polymers in photovoltaic applications. In general, functionalization of
conjugated polymers and understanding of molecular packing of electron donors and electron acceptors are very important to produce efficient solar cells. As a result, it is important to design and synthesize novel monomers which will require making new π-
conjugated donors and acceptors
polymers and understand the influence of these new
polymers in bulk heterojunction to design polymer solar cells. In this study, two different monomers were synthesized. The first monomer was designed and synthesized to investigate the effect of π-
conjugated linker directly attached to the polymer backbone where the polymer backbone was based on thiophene unit and
conjugated linker was 1,2,3-triazole. In a different study, a
conjugated monomer based on benzthiadiazole was designed and synthesized in order to synthesize new acceptor homopolymers and alternating copolymers. Two different monomers with different alkyl side chains based on benzthiadiazole were synthesized and
subject to Suzuki and Stille polymerization to get respective
polymers.
Advisors/Committee Members: Dhandapani Venkataraman.
Subjects/Keywords: Monomers; New Conjugated Polymers; Organic Chemistry
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APA (6th Edition):
Jadhav, K. G. (2012). Synthesis of Monomers for New Conjugated Polymers. (Masters Thesis). University of Massachusetts. Retrieved from https://scholarworks.umass.edu/theses/753
Chicago Manual of Style (16th Edition):
Jadhav, Kedar Girish. “Synthesis of Monomers for New Conjugated Polymers.” 2012. Masters Thesis, University of Massachusetts. Accessed February 21, 2020.
https://scholarworks.umass.edu/theses/753.
MLA Handbook (7th Edition):
Jadhav, Kedar Girish. “Synthesis of Monomers for New Conjugated Polymers.” 2012. Web. 21 Feb 2020.
Vancouver:
Jadhav KG. Synthesis of Monomers for New Conjugated Polymers. [Internet] [Masters thesis]. University of Massachusetts; 2012. [cited 2020 Feb 21].
Available from: https://scholarworks.umass.edu/theses/753.
Council of Science Editors:
Jadhav KG. Synthesis of Monomers for New Conjugated Polymers. [Masters Thesis]. University of Massachusetts; 2012. Available from: https://scholarworks.umass.edu/theses/753
14.
Fong, Darryl.
Latently-reactive conjugated polymer-coated single-walled carbon nanotubes.
Degree: PhD, 2019, McMaster University
URL: http://hdl.handle.net/11375/24328
► Latently-reactive conjugated polymer-coated single-walled carbon nanotubes
Single-walled carbon nanotubes (SWNTs) are intensely investigated nanomaterials that exhibit intriguing physical and optoelectronic properties. Although SWNTs are highly…
(more)
▼ Latently-reactive conjugated polymer-coated single-walled carbon nanotubes
Single-walled carbon nanotubes (SWNTs) are intensely investigated nanomaterials that exhibit intriguing physical and optoelectronic properties. Although SWNTs are highly regarded in terms of their potential societal impact, commercialization of SWNT applications has been dampened by the difficulty in SWNT processability and purification. Current commercially viable carbon nanotube syntheses produce complex mixtures of metallic and semiconducting SWNTs, as well as amorphous carbon and metal catalyst particles. Furthermore, the ability to decorate carbon nanotube surfaces to modulate their properties is non-trivial, especially if concurrent preservation of optoelectronic properties is desired. To date, the issues of SWNT solubilization, sorting, and functionalization have been approached in a piecemeal fashion. Conjugated polymers, which are macromolecules that possess extended π-systems, have the potential to address all of these issues simultaneously. In my Thesis, I explore conjugated polymer structures to investigate (i) factors that influence dispersion selectivity, and (ii) the decoration of polymer-SWNT complexes by incorporating reactive moieties into the polymer structure.
The work presented in this Thesis begins by examining the ability of conjugated polymers to sort SWNTs. To date, the selective dispersion of metallic SWNTs is unrealized. In Chapter 2, I examine the effect of the electronic nature of the conjugated backbone on the selective dispersion of SWNTs by preparing SWNT dispersions pre- and post-methylation of a pyridine-containing conjugated polymer. In doing so, I prepare a series of polymers with identical degrees of polymerization and dispersity (to minimize extraneous selectivity factors) and find that electron rich π-systems disperse only semiconducting SWNTs, while electron poor π-systems disperse relatively more metallic SWNTs. In Chapter 3, I challenge the conventional wisdom that complete backbone conjugation is required to selectively disperse semiconducting SWNTs by introducing non-conjugated linkers into the polymer backbone and demonstrating that nanotube sorting is still possible.
I next examine conjugated polymers as tools that can simultaneously sort SWNTs and impart reactivity to the polymer-SWNT complex, while preserving SWNT optoelectronic properties. In Chapter 4, I incorporate azides into polyfluorene side chains and perform solution-phase Strain-Promoted Azide-Alkyne Cycloaddition (SPAAC). I show that the polymer-SWNT complex can be rapidly decorated with strained cyclooctyne derivatives, and that only pre-clicked polymer enables for sorting of semiconducting SWNTs. The sorted SWNT population can then be made water soluble post-SPAAC, enabling for the study of SWNT emission in solvents with very different polarity. In Chapter 5, I examine the reactivity of azide-containing polymer-SWNT thin films and show that thin film properties can be drastically altered. Interfacial chemistry enables for the…
Advisors/Committee Members: Adronov, Alex, Chemistry and Chemical Biology.
Subjects/Keywords: Conjugated Polymers; Carbon Nanotubes; Click Chemistry
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APA (6th Edition):
Fong, D. (2019). Latently-reactive conjugated polymer-coated single-walled carbon nanotubes. (Doctoral Dissertation). McMaster University. Retrieved from http://hdl.handle.net/11375/24328
Chicago Manual of Style (16th Edition):
Fong, Darryl. “Latently-reactive conjugated polymer-coated single-walled carbon nanotubes.” 2019. Doctoral Dissertation, McMaster University. Accessed February 21, 2020.
http://hdl.handle.net/11375/24328.
MLA Handbook (7th Edition):
Fong, Darryl. “Latently-reactive conjugated polymer-coated single-walled carbon nanotubes.” 2019. Web. 21 Feb 2020.
Vancouver:
Fong D. Latently-reactive conjugated polymer-coated single-walled carbon nanotubes. [Internet] [Doctoral dissertation]. McMaster University; 2019. [cited 2020 Feb 21].
Available from: http://hdl.handle.net/11375/24328.
Council of Science Editors:
Fong D. Latently-reactive conjugated polymer-coated single-walled carbon nanotubes. [Doctoral Dissertation]. McMaster University; 2019. Available from: http://hdl.handle.net/11375/24328
Cornell University
15.
Gopalakrishnan, Deepti.
Synthesis Of Conjugated Porous Organic Polymers Using Metathesis
.
Degree: 2015, Cornell University
URL: http://hdl.handle.net/1813/41081
► Conjugated porous organic polymers (CPOPs) are a class of polymers that have persistent porosity and inherently amorphous. Due to their extended conjugation and porosity these…
(more)
▼ Conjugated porous organic
polymers (CPOPs) are a class of
polymers that have persistent porosity and inherently amorphous. Due to their extended conjugation and porosity these materials can be applied in sensors, light emitting devices, transistors, diodes, capacitors, catalysis, and several other devices. Different reactions have been utilized for synthesizing CPOPs like aryl-aryl cross coupling reactions, cyclotrimerization. More recently, reversible reactions have been used to form covalent organic frameworks (COFs). It is believed that reversible reactions enable error correction over the period of the reaction time. This leads to high surface area materials and also predictable solid-state order. However, most of the reactions utilized in the synthesis of
conjugated porous organic
polymers are irreversible, thus limiting the highest achievable surface area. The reactions utilized for making CPOPs and COFs are limited. Here I report the development of
conjugated polymer networks synthesized by reversible reactions: alkene and alkyne metathesis. Trisphenylene vinylene
polymers (TPV) synthesized by alkene metathesis were utilized to detect low volatility explosives like RDX and PETN from vapor phase, for the first time. CPOPs were synthesized using alkyne metathesis catalyst (trisamido)molybdenum alkylidyne, after extensive studies on kinetic activities of the catalyst. Both these studies highlighted the vast scope of the metathesis reactions in the synthesis of CPOPs and the applications like explosive sensing, that result from the extended conjugation in the system, which has a potential application in real world explosive sensors. iii
Advisors/Committee Members: Abruna,Hector D (committeeMember), Coates,Geoffrey (committeeMember).
Subjects/Keywords: RDX detection;
alkyne metathesis;
conjugated porous polymers
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APA (6th Edition):
Gopalakrishnan, D. (2015). Synthesis Of Conjugated Porous Organic Polymers Using Metathesis
. (Thesis). Cornell University. Retrieved from http://hdl.handle.net/1813/41081
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Gopalakrishnan, Deepti. “Synthesis Of Conjugated Porous Organic Polymers Using Metathesis
.” 2015. Thesis, Cornell University. Accessed February 21, 2020.
http://hdl.handle.net/1813/41081.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Gopalakrishnan, Deepti. “Synthesis Of Conjugated Porous Organic Polymers Using Metathesis
.” 2015. Web. 21 Feb 2020.
Vancouver:
Gopalakrishnan D. Synthesis Of Conjugated Porous Organic Polymers Using Metathesis
. [Internet] [Thesis]. Cornell University; 2015. [cited 2020 Feb 21].
Available from: http://hdl.handle.net/1813/41081.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Gopalakrishnan D. Synthesis Of Conjugated Porous Organic Polymers Using Metathesis
. [Thesis]. Cornell University; 2015. Available from: http://hdl.handle.net/1813/41081
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
16.
Peterson, Eric David.
Nanocomposites for Enhancing Current in Organic Solar Cells.
Degree: 2012, Wake Forest University
URL: http://hdl.handle.net/10339/37435
► The enhancement of charge collection in organic photovoltaics by using nanocomposite materials is investigated. Two such approaches are detailed in this thesis. Chapter 1 addresses…
(more)
▼ The enhancement of charge collection in organic photovoltaics by using nanocomposite materials is investigated. Two such approaches are detailed in this thesis. Chapter 1 addresses the addition of metal nanorods to the PEDOT layer of an organic solar cell in an attempt to focus incident light for better absorption by the polymer layer. Composites designed to facilitate charge transfer from nanoparticles to the polymer/fullerene system are the focus of the second chapter. Chapter 3 details a refinement to the research presented in chapter 2, adding fullerenes to the mix and creating ternary systems and providing an analytical framework for evaluating these systems. The material choices are expanded in chapter 4; we investigate a new, lower band gap conjugated polymer (PCPDTBT) as well as core-shell nanoparticles and how they interact in the system. Results are reported and further avenues of research are suggested.
Subjects/Keywords: conjugated polymers
…with conjugated
polymers.
Efforts to incorporate CdSe into hybrid organic devices have… …choices are expanded in chapter 4; we investigate a new, lower
band gap conjugated polymer (…
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APA (6th Edition):
Peterson, E. D. (2012). Nanocomposites for Enhancing Current in Organic Solar Cells. (Thesis). Wake Forest University. Retrieved from http://hdl.handle.net/10339/37435
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Peterson, Eric David. “Nanocomposites for Enhancing Current in Organic Solar Cells.” 2012. Thesis, Wake Forest University. Accessed February 21, 2020.
http://hdl.handle.net/10339/37435.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Peterson, Eric David. “Nanocomposites for Enhancing Current in Organic Solar Cells.” 2012. Web. 21 Feb 2020.
Vancouver:
Peterson ED. Nanocomposites for Enhancing Current in Organic Solar Cells. [Internet] [Thesis]. Wake Forest University; 2012. [cited 2020 Feb 21].
Available from: http://hdl.handle.net/10339/37435.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Peterson ED. Nanocomposites for Enhancing Current in Organic Solar Cells. [Thesis]. Wake Forest University; 2012. Available from: http://hdl.handle.net/10339/37435
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Georgia Tech
17.
Ponder, James.
A Pedot by any other name: Tuning the electroactivity of dioxy-heterocycles for redox and solid state applications.
Degree: PhD, Chemistry and Biochemistry, 2017, Georgia Tech
URL: http://hdl.handle.net/1853/60158
► Redox active conjugated polymers are used in a variety of applications including electrochromism, charge storage, plasmonic resonance tuning, and electrochemical transistors. This thesis describes the…
(more)
▼ Redox active
conjugated polymers are used in a variety of applications including electrochromism, charge storage, plasmonic resonance tuning, and electrochemical transistors. This thesis describes the development of processable, electron-rich dioxyheterocycle-based
polymers for use in electrochromic and charge-storage applications. This thesis reports the development of soluble
polymers that can be solution processed from organic or aqueous solutions (inks) and are redox active in organic or aqueous electrolytes with variable optical and redox properties through subtle differences in the repeat units and heteroatoms used. This thesis describes the development of processable, electron-rich dioxyheterocycle-based
polymers for use in electrochromic and charge-storage applications. Materials with low onsets of oxidation and broad electroactivity over a large voltage window, as seen with electropolymerized poly(3,4-ethylenedioxythiophene) (PEDOT), are of interest for charge storage applications. Chapter 3 reports and discusses the copolymerization of alkoxy-functionalized 3,4-propylenedioxythiophenes (ProDOTs) with unfunctionalized 3,4-ethylenedioxythiophene (EDOT) in varying ratios using direct arylation to produce a series of solution processable
polymers with highly tunable optical and electronic properties. Within this series, we have identified poly(ProDOT-alt-biEDOT) (PE2), a copolymer containing 67% EDOT compositionally, which combines the low oxidation potential, the redox behavior, and the deep-blue neutral color that are characteristic of PEDOT with the high solubility, exceptional electrochromic contrast, and color neutrality in the oxidized state characteristic of alkoxy-functionalized polyProDOTs. 3,4-Phenylenedioxythiophene (PheDOT) is a unit that is similar to EDOT in terms of planarity and steric interactions but has different electronic properties due to an attached phenyl ring that allows for electron delocalization away from the thiophene ring. This unit, and its use in soluble copolymers prepared via direct (hetero) arylation polymerization (DHAP), is discussed in Chapter 4. The notable C-H inactivity of the attached phenylene unit is compared to aromatic solvents used for DHAP and the redox stability of these copolymers are demonstrated. The first example of a solution processable dioxythiophene-alt-dioxyselenophene polymer, poly(ProDOT-alt-EDOS), prepared via DHAP is reported and its optical and electrochemical properties are compared to the all thiophene analog and other relevant dioxythiophene
polymers. By substituting the sulfur atom for a selenium atom on one of the monomers in the repeat unit, a significant red-shift of both the neutral and polaronic absorbances results, as well as a reduction in the onset of oxidation compared to the all thiophene analog.Due to the redox and optical similarities of PE2 and PEDOT, the solid-state electrical conductivity of the chemically doped ProDOTxEDOTy series (discussed in Chapter 3) is studied in Chapter 6. Additional polymer structures are introduced to…
Advisors/Committee Members: Reynolds, John R. (advisor), Marder, Seth R. (committee member), France, Stefan (committee member), Reichmanis, Elsa (committee member), Bottomley, Lawrence A. (committee member).
Subjects/Keywords: Conjugated polymers; Dioxythiophene; Supercapacitor; Electrochromism; Direct arylation
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APA (6th Edition):
Ponder, J. (2017). A Pedot by any other name: Tuning the electroactivity of dioxy-heterocycles for redox and solid state applications. (Doctoral Dissertation). Georgia Tech. Retrieved from http://hdl.handle.net/1853/60158
Chicago Manual of Style (16th Edition):
Ponder, James. “A Pedot by any other name: Tuning the electroactivity of dioxy-heterocycles for redox and solid state applications.” 2017. Doctoral Dissertation, Georgia Tech. Accessed February 21, 2020.
http://hdl.handle.net/1853/60158.
MLA Handbook (7th Edition):
Ponder, James. “A Pedot by any other name: Tuning the electroactivity of dioxy-heterocycles for redox and solid state applications.” 2017. Web. 21 Feb 2020.
Vancouver:
Ponder J. A Pedot by any other name: Tuning the electroactivity of dioxy-heterocycles for redox and solid state applications. [Internet] [Doctoral dissertation]. Georgia Tech; 2017. [cited 2020 Feb 21].
Available from: http://hdl.handle.net/1853/60158.
Council of Science Editors:
Ponder J. A Pedot by any other name: Tuning the electroactivity of dioxy-heterocycles for redox and solid state applications. [Doctoral Dissertation]. Georgia Tech; 2017. Available from: http://hdl.handle.net/1853/60158
Texas A&M University
18.
Zeits, Paul.
Olefin Metatheses in Metal Coordination Spheres: Development of Gyroscope-like trans-Spanning Bis(pyridine) Complexes and Organometallic pi-Adducts of Conjugated Polymers.
Degree: 2012, Texas A&M University
URL: http://hdl.handle.net/1969.1/ETD-TAMU-2011-12-10265
► The olefin metathesis reaction has become one of the most powerful carbon-carbon bond forming reaction in synthetic chemistry. This work has expanded the utility of…
(more)
▼ The olefin metathesis reaction has become one of the most powerful carbon-carbon bond forming reaction in synthetic chemistry. This work has expanded the utility of olefin metathesis in metal coordination spheres in three major directions (1) the synthesis and characterization of trans-spanning bis(pyridine)PtCl2 complexes, (2) the developme-adducts of polyacetylene (PA), and (3) the development of regioregular -adducts of poly(phenylene-vinylene) (PPV).
Chapter I gives a brief overview of olefin metathesis and previous applications to organometallic substrates.
Chapter II details the synthesis of pyridine ligands containing alkenyl substituents, 2-NC5H4(CH2O(CH2)nCH=CH2) (n = 1, 2), 3-NC5H4(CH2O(CH2)nCH=CH2) (n = 1-5, 8, 9), and 3,5-NC5H3(p-C6H4O(CH2)7CH=CH2)2. Metalation of the new ligands with PtCl2 affords the corresponding trans-bis(pyridine)dichloroplatinum complexes, trans-PtCl2(2-NC5H4(CH2O(CH2)nCH=CH2))2 (n = 1, 2), trans-PtCl2(3-NC5H4(CH2O(CH2)nCH=CH2))2 (n = 1-5, 8, 9), and trans-PtCl2(3,5-NC5H3(p-C6H4O(CH2)7CH=CH2))2. Ring-closing metathesefirst generation catalyst followed by hydrogenations with Pd/C afford the title complexes trans-PtCl2-(NC5H4(CH2O(CH2)2n+2OCH2)H4C5N)] (n = 1, 2), trans-PtCl2-(NC5H4(CH2O(CH2)2n+2OCH2)H4C5N)] (n = 4, 8, 9), and trans-PtCl2-(NC5H3(p-C6H4O(CH2)12O-p-C6H4)2H3C5N)]. Reactions with methylmagnesium bromide afford trans-PtCl(CH3)(3-NC5H4(CH2O(CH2)nCH=CH2))2 (n = 2, 8) and trans-PtCl(CH3-(NC5H4(CH2O(CH2)nOCH2)H4C5N)] (n = 10, 18), which feature dipolar rotators. Low temperature NMR spectra in the latter remained facile on the NMR time scale in CDFCl2 at -120 degrees Celsius.
Chapter III focuses on the application of ROMP with organometallic monomers to form metal pi-adducts of polyacetylene. The new complex (n4-benzene)Cp*Ir has been synthesized, crystallographically characterized, and evaluated in the ROMP reaction. Monomers (n4-benzene)CpIr, [(n6-COT)CpRu][PF6], and (n4-COT)Fe(CO)3 were also evaluated in the ROMP reaction. ROMP of (?4-benzene)CpIr with Grubbs' first generation catalyst afforded the conductive regioregular polymer CpIr-PA.
Chapter IV focuses on the synthesis of the divinyl benzene complexes [Cp*Ir(C6H4(CH=CH2)2)][BF4]2 and [Cp*Ru(C6H4(CH=CH2)2)][OTf] and their polymerization via ADMET to afford PPV systems. Treatment of divinyl benzene ed the conductive regioregular
polymers [Cp*Ir-PPV][BF4]2n and [Cp*Ru-PPV][OTf]n. The photophysical properties of the new -metal adducts of PPV exhibit blue-shifts relative to typical PPVs and retain strong UV absorption.
Advisors/Committee Members: Gladysz, John A. (advisor), Darensbourg, Donald J. (committee member), Gabbai, Francois P. (committee member), Grunlan, Jaime C. (committee member).
Subjects/Keywords: olefin metathesis; conjugated polymers; conducting polymers; molecular gyroscopes
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APA ·
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APA (6th Edition):
Zeits, P. (2012). Olefin Metatheses in Metal Coordination Spheres: Development of Gyroscope-like trans-Spanning Bis(pyridine) Complexes and Organometallic pi-Adducts of Conjugated Polymers. (Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/ETD-TAMU-2011-12-10265
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Zeits, Paul. “Olefin Metatheses in Metal Coordination Spheres: Development of Gyroscope-like trans-Spanning Bis(pyridine) Complexes and Organometallic pi-Adducts of Conjugated Polymers.” 2012. Thesis, Texas A&M University. Accessed February 21, 2020.
http://hdl.handle.net/1969.1/ETD-TAMU-2011-12-10265.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Zeits, Paul. “Olefin Metatheses in Metal Coordination Spheres: Development of Gyroscope-like trans-Spanning Bis(pyridine) Complexes and Organometallic pi-Adducts of Conjugated Polymers.” 2012. Web. 21 Feb 2020.
Vancouver:
Zeits P. Olefin Metatheses in Metal Coordination Spheres: Development of Gyroscope-like trans-Spanning Bis(pyridine) Complexes and Organometallic pi-Adducts of Conjugated Polymers. [Internet] [Thesis]. Texas A&M University; 2012. [cited 2020 Feb 21].
Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2011-12-10265.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Zeits P. Olefin Metatheses in Metal Coordination Spheres: Development of Gyroscope-like trans-Spanning Bis(pyridine) Complexes and Organometallic pi-Adducts of Conjugated Polymers. [Thesis]. Texas A&M University; 2012. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2011-12-10265
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Louisiana State University
19.
Choi, JinWoo.
Semiconducting Polymers and Block Copolymers Prepared by Chain-Growth Living Polymerization.
Degree: PhD, Chemistry, 2011, Louisiana State University
URL: etd-07112011-153829
;
https://digitalcommons.lsu.edu/gradschool_dissertations/2308
► Organic semiconducting polymers are the unique materials that considered a basis for the next generation of electronic and optoelectronic applications. However, high device performance of…
(more)
▼ Organic semiconducting polymers are the unique materials that considered a basis for the next generation of electronic and optoelectronic applications. However, high device performance of semiconducting polymers strongly depends on their molecular structure and nanoscale organization. Therefore, it is an essential task to develop robust and versatile synthetic approaches to build such well-defined semiconducting polymer materials. This Ph.D. study aimed at design of state-of-the-art synthetic approaches towards organic semiconducting polymers via chain-growth living polymerization as well as development of polymer architectures which can self-organize into supramolecular nanoassemblies or allow external control of the polymer’s properties. First, we prepared a series of temperature-responsive water-soluble poly(N-isopropylacrylamide)-functionalized polythiophenes, and showed that their supramolecular organization and temperature control of their conformation and conjugation length was strongly dependent on the extent of regioregularity of the polythiophene backbone. In order to improve the regioregularity, we developed a general approach to highly efficient external catalytic initiators for the synthesis of various semiconducting polymers. Extensive studies allowed better understanding of the unusual catalytic systems, and their behavior in chain-growth living polymerization reactions. Using this approach, we synthesized a variety of amphiphilic polythiophene block copolymers incorporating a low energy gap perylenedicarboximide (PDCI) unit to demonstrate the possibility to control supramolecular organization and photophysical properties of such systems by using external stimuli (such as solvent and temperature). As part of our general studies towards design of near-infrared (NIR) fluorescent conjugated polymers, we developed a synthetic approach to a novel class of such materials which are based on cyanine dyes as monomeric repeating units. The obtained polymers showed a variety of properties (thermal stability, solubility, absorption and fluorescence in the NIR range) that may make them a useful class of NIR fluorescent conjugated polymers.
Subjects/Keywords: semiconducting polymers; block copolymers; living polymerization; conjugated polymers
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APA (6th Edition):
Choi, J. (2011). Semiconducting Polymers and Block Copolymers Prepared by Chain-Growth Living Polymerization. (Doctoral Dissertation). Louisiana State University. Retrieved from etd-07112011-153829 ; https://digitalcommons.lsu.edu/gradschool_dissertations/2308
Chicago Manual of Style (16th Edition):
Choi, JinWoo. “Semiconducting Polymers and Block Copolymers Prepared by Chain-Growth Living Polymerization.” 2011. Doctoral Dissertation, Louisiana State University. Accessed February 21, 2020.
etd-07112011-153829 ; https://digitalcommons.lsu.edu/gradschool_dissertations/2308.
MLA Handbook (7th Edition):
Choi, JinWoo. “Semiconducting Polymers and Block Copolymers Prepared by Chain-Growth Living Polymerization.” 2011. Web. 21 Feb 2020.
Vancouver:
Choi J. Semiconducting Polymers and Block Copolymers Prepared by Chain-Growth Living Polymerization. [Internet] [Doctoral dissertation]. Louisiana State University; 2011. [cited 2020 Feb 21].
Available from: etd-07112011-153829 ; https://digitalcommons.lsu.edu/gradschool_dissertations/2308.
Council of Science Editors:
Choi J. Semiconducting Polymers and Block Copolymers Prepared by Chain-Growth Living Polymerization. [Doctoral Dissertation]. Louisiana State University; 2011. Available from: etd-07112011-153829 ; https://digitalcommons.lsu.edu/gradschool_dissertations/2308
Iowa State University
20.
Mike, Jared Franklin.
Synthesis and characterization of new conjugated materials based on benzobisazoles and their incorporation into electronic devices.
Degree: 2011, Iowa State University
URL: https://lib.dr.iastate.edu/etd/10394
► Benzobisazoles (specifically benzobisoxazoles and benzobisthiazoles) have proven themselves to be useful heterocycles when included as part of conjugated materials. Unfortunately, the traditional reaction conditions that…
(more)
▼ Benzobisazoles (specifically benzobisoxazoles and benzobisthiazoles) have proven themselves to be useful heterocycles when included as part of conjugated materials. Unfortunately, the traditional reaction conditions that are used to produce these moieties are rather harsh. This work discloses easier, softer methods for the production of benzobisazoles and their subsequent incorporation into some of the first organic soluble benzobisazole containing conjugated polymers. These materials are then incorporated into electronic devices including solar cells, light-emitting diodes, and field effect transistors. The evaluation of device performances along with basic chemical and physical characterization such as NMR, UV/Vis spectroscopy, fluorescence spectroscopy, atomic force microscopy and X-ray diffraction, among others, are used to establish links between chemical structure and overall material function, which can then be used to guide future research efforts.
Subjects/Keywords: benzobisoxazole; benzobisthiazole; conjugated polymers; heterocycles; organic electronics; polymers; Chemistry
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APA (6th Edition):
Mike, J. F. (2011). Synthesis and characterization of new conjugated materials based on benzobisazoles and their incorporation into electronic devices. (Thesis). Iowa State University. Retrieved from https://lib.dr.iastate.edu/etd/10394
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Mike, Jared Franklin. “Synthesis and characterization of new conjugated materials based on benzobisazoles and their incorporation into electronic devices.” 2011. Thesis, Iowa State University. Accessed February 21, 2020.
https://lib.dr.iastate.edu/etd/10394.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Mike, Jared Franklin. “Synthesis and characterization of new conjugated materials based on benzobisazoles and their incorporation into electronic devices.” 2011. Web. 21 Feb 2020.
Vancouver:
Mike JF. Synthesis and characterization of new conjugated materials based on benzobisazoles and their incorporation into electronic devices. [Internet] [Thesis]. Iowa State University; 2011. [cited 2020 Feb 21].
Available from: https://lib.dr.iastate.edu/etd/10394.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Mike JF. Synthesis and characterization of new conjugated materials based on benzobisazoles and their incorporation into electronic devices. [Thesis]. Iowa State University; 2011. Available from: https://lib.dr.iastate.edu/etd/10394
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Indian Institute of Science
21.
Kanimozhi, K Catherine.
Rational Design of Diketopyrrolopyrrole-Based Conjugated Polymers for Ambipolar Charge Transport.
Degree: 2013, Indian Institute of Science
URL: http://etd.iisc.ernet.in/2005/3389
;
http://etd.iisc.ernet.in/abstracts/4255/G25850-Abs.pdf
► The present thesis is focused on the rational design of Diketopyrrolopyrrole based π- conjugated polymers for organic electronics. The thesis is organized into six different…
(more)
▼ The present thesis is focused on the rational design of Diketopyrrolopyrrole based π-
conjugated polymers for organic electronics. The thesis is organized into six different chapters and a brief description of the individual chapters is provided below.
Chapter 1 briefly describes the physics governing the electronic processes occurring in organic photovoltaics (OPVs) and organic field-effect transistors (OFETs) followed by design rules for the synthesis of
conjugated polymers for organic electronics. Diketopyrrolopyrrole (DPP) based π-
conjugated materials and their development in OPVs and OFETs have been highlighted.
Chapter 2 discusses the synthesis and characterization of a series of small molecules of DPP derivatives attached with different alkyl chains. Influence of side chains on the photophysical properties of these DPP derivatives have been studied by UV-visible spectroscopy and DFT calculations. Crystal structure studies revealed the effect of alkyl chains on the torsional angle, crystal packing, and intermolecular interactions such as π-π stacking.
Chapter 3 reports the synthesis of novel diketopyrrolopyrrole-diketopyrrolopyrrole (DPPDPP) based
conjugated copolymers and their application in high mobility organic field-effect transistors. Effect of insulating alkyl chains on polymer thin film morphology, lamellar packing and π-π stacking interactions have been studied in detail. Investigation of OFET performance of these DPP-DPP copolymers with branched alkyl chains (N-CS2DPP-ODEH) resulted in low charge carrier mobilities as compared to the
polymers (N-CS2DPP-ODHE) with linear alkyl chains. Polymer with triethylene glycol side chains (N-CS2DPP-ODTEG) exhibited a high field-effect electron mobility value of ~3 cm2V-1s-1 with a very low threshold voltage of ~2 V.
Chapter 4 investigates the effect of torsional angle on the intermolecular interactions and charge transport properties of diketopyrrolopyrrole (DPP) based
polymers (PPDPP-OD-HE and PPDPP-OD-TEG). Grazing incidence x-ray diffraction studies shows the different orientation of the polymer crystallites and lamellar packing involved in polymer thin films. Investigation of OFETs evidenced the effect of torsional angle on the charge transport properties where the polymer with higher torsional angle PPDPP-OD-TEG resulted in high threshold voltage with less charge carrier mobility compared to the polymer with lower torsional angle (N-CS2DPP-OD-TEG).
Chapter 5 investigates the effect of photoactive material morphology on the solar cell device performance, and charge transfer kinetics by adding high boiling point processing additives. DPP based donor-acceptor (D-A) type low band gap
polymers (PTDPPQ and PPDPPQ) have been synthesized and employed in bulk-heterojunction (BHJ) solar cells with the acceptor PC71BM. Addition of processing additive 1,8-diiodooctane (DIO) resulted in three order improvements in power conversion efficiency (PCE).
Chapter 6 describes the design and synthesis of two diketopyrrolopyrrole based copolymers (PPDPP-BBT and PTDPP-BBT) for…
Advisors/Committee Members: Patil, Satish.
Subjects/Keywords: Organic Electronics; Diketopyrrolopyrrole Conjugated Polymers; Conjugated Polymers - Synthesis; Ambipolar Charge Transport; Organic Field-Effect Transistors; Diketopyrrolopyrrole Polymers - Charge Transport; Polymer Semiconductors; Organic Photovoltaics; Donor-Acceptor Conjugated Polymers; Diketopyrrolopyrrole Copolymers; Diketopyrrolopyrrole Copolymer Interfaces - Thin Film Devices; Thiophene Diketopyrrolopyrroles; Conjugated Polymers - Organic Electronics; Polymer Solar Cells; Organic Chemistry
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APA ·
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Export
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APA (6th Edition):
Kanimozhi, K. C. (2013). Rational Design of Diketopyrrolopyrrole-Based Conjugated Polymers for Ambipolar Charge Transport. (Thesis). Indian Institute of Science. Retrieved from http://etd.iisc.ernet.in/2005/3389 ; http://etd.iisc.ernet.in/abstracts/4255/G25850-Abs.pdf
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Kanimozhi, K Catherine. “Rational Design of Diketopyrrolopyrrole-Based Conjugated Polymers for Ambipolar Charge Transport.” 2013. Thesis, Indian Institute of Science. Accessed February 21, 2020.
http://etd.iisc.ernet.in/2005/3389 ; http://etd.iisc.ernet.in/abstracts/4255/G25850-Abs.pdf.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Kanimozhi, K Catherine. “Rational Design of Diketopyrrolopyrrole-Based Conjugated Polymers for Ambipolar Charge Transport.” 2013. Web. 21 Feb 2020.
Vancouver:
Kanimozhi KC. Rational Design of Diketopyrrolopyrrole-Based Conjugated Polymers for Ambipolar Charge Transport. [Internet] [Thesis]. Indian Institute of Science; 2013. [cited 2020 Feb 21].
Available from: http://etd.iisc.ernet.in/2005/3389 ; http://etd.iisc.ernet.in/abstracts/4255/G25850-Abs.pdf.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Kanimozhi KC. Rational Design of Diketopyrrolopyrrole-Based Conjugated Polymers for Ambipolar Charge Transport. [Thesis]. Indian Institute of Science; 2013. Available from: http://etd.iisc.ernet.in/2005/3389 ; http://etd.iisc.ernet.in/abstracts/4255/G25850-Abs.pdf
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Indian Institute of Science
22.
Chaudhuri, Debansu.
Investigation Of A Novel Class Of Conducting Polyaniline And Related Systems.
Degree: 2006, Indian Institute of Science
URL: http://hdl.handle.net/2005/322
► The interest in conjugated polymers has been two-fold. A rich variety of intriguing physical phenomena, combined with its immense technological implications in the area of…
(more)
▼ The interest in
conjugated polymers has been two-fold. A rich variety of intriguing physical phenomena, combined with its immense technological implications in the area of molecular electronics, sensors etc. has inspired the researchers all over the globe. The work presented in this thesis is focussed on one of the most widely studied
conjugated polymers, namely polyaniline (PANI), which is well known for its high conductivity and remarkable stability in the proton-doped form. The thesis is divided into two chapters and each chapter is further divided into several parts.
In the first chapter, we take a look at some novel systems based on PANI that exhibit interesting electrical and optical properties. To begin with, we report the synthesis and characterization (Part I, Chapter 3) a new class of highly conducting polyaniline doped with electron deficient Lewis acids, namely the boron trihalides (BX3, X = F, Cl, and Br). We discuss the various attributes of this interesting class of materials that set it apart from the conventional proton-doped PANI systems. It is known that the conductivity in doped PANI is greatly influenced by the presence of structural disorder. Previous studies have associated the conductivity in doped PANI with the partial crystallinity that is achieved upon proton doping. At the same time, the amorphous regions that have a high degree of disorder were believed to suppress the metallic nature in these doped systems. In view of this "higher-crystallinity-higher-conductivity" picture, it is interesting to note that the BX3 doped PANI remain absolutely amorphous despite being more conducting than previously known samples. Through our investigation, we have been able to address some of the most important and long-standing questions pertaining to the nature of the charge carriers and the role of disorder in doped PANI.
A detailed study of the transport properties in Part II, Chapter 3 helps us to understand the mechanism of charge transfer in these novel systems. With the help of our results, we establish that the present systems do not belong to the family of quasi one-dimensional conductors, in stark contrast to the conventional proton-doped samples. Instead, our systems are best described as granular metals, where the conduction mechanism is controlled by the size of the conducting grains and the nature of the grain boundaries. Through a comprehensive study of the magnetic properties based on d. c. magnetic susceptibility and EPR spectroscopy, we further establish that the intrinsic conductivity of these samples are much higher than the previously known systems. By studying the interaction of the mobile charge carriers and the localized spins in the systems, we have established that our samples are far less disordered, and therefore qualify as superior systems when compared to the more conventional proton-doped PANI.
One of the serious disadvantages of the conventional protonated PANI lies in its thermal instability. On heating above 75 ±C in air, the polymer backbone undergoes an irreversible…
Advisors/Committee Members: Sarma, D D.
Subjects/Keywords: Polyaniline (PANI); Doped Polyaniline; Novel Polyaniline Systems; Conjugated Polymers; Polymers - Conduction; Conducting Polyaniline; Organic Chemistry
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APA (6th Edition):
Chaudhuri, D. (2006). Investigation Of A Novel Class Of Conducting Polyaniline And Related Systems. (Thesis). Indian Institute of Science. Retrieved from http://hdl.handle.net/2005/322
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Chaudhuri, Debansu. “Investigation Of A Novel Class Of Conducting Polyaniline And Related Systems.” 2006. Thesis, Indian Institute of Science. Accessed February 21, 2020.
http://hdl.handle.net/2005/322.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Chaudhuri, Debansu. “Investigation Of A Novel Class Of Conducting Polyaniline And Related Systems.” 2006. Web. 21 Feb 2020.
Vancouver:
Chaudhuri D. Investigation Of A Novel Class Of Conducting Polyaniline And Related Systems. [Internet] [Thesis]. Indian Institute of Science; 2006. [cited 2020 Feb 21].
Available from: http://hdl.handle.net/2005/322.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Chaudhuri D. Investigation Of A Novel Class Of Conducting Polyaniline And Related Systems. [Thesis]. Indian Institute of Science; 2006. Available from: http://hdl.handle.net/2005/322
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of California – San Diego
23.
Savagatrup, Suchol.
Semiconducting polymers for stretchable, ultra-flexible, and mechanically robust organic photovoltaics.
Degree: Chemical Engineering, 2016, University of California – San Diego
URL: http://www.escholarship.org/uc/item/8p7441px
► The original vision of organic electronics comprises the use of organic conductors and semiconductors specifically designed to accommodate large strains to enable highly deformable and…
(more)
▼ The original vision of organic electronics comprises the use of organic conductors and semiconductors specifically designed to accommodate large strains to enable highly deformable and mechanically robust devices for organic photovoltaics, biosensors, and electronic skins. However, mechanical properties of organic materials are often overlooked; as a result, many of these materials are unable to accommodate the mechanical stresses required for their intended applications. Thus, it is important to understand the parameters that govern mechanical properties of these materials. Chapter 1 provides an introduction to the characteristics, applications, and fabrications of stretchable electronics. The idea of intrinsically stretchable electronics comprising molecularly designs of semiconducting polymers is outlined. Chapter 2 focuses on the mechanical degradation and stability of organic solar cells. The key highlights are the importance of mechanical properties and mechanical effects on the viability of organic solar cells during manufacture and in operational environment. Chapter 3 and Appendix A investigate the effects of the length of the alkyl side chains in poly(3-alkylthiophenes) on the deformability of the pure polymer films and their blends with fullerenes. Chapter 4, 5, and Appendix B provide studies on the inherent competition between good photovoltaic performance and mechanical compliance; a critical length of the alkyl side chains on the poly(3-alkylthiophene) allows for co-optimization of both photovoltaic and mechanical properties. In Chapter 6 and Appendix C, the effect of incompletely separated grades of electron acceptors on the mechanical deformability of organic solar cells is investigated in an effort to simultaneously improve the mechanical robustness of the organic solar cells and reduce the energy of production. Chapter 7 describes the plasticization of the common transparent electrode using common processing additives. Chapter 8, 9, and 10 investigate the mechanical properties of low-bandgap polymers as the function of the molecular structure and solid-state packing. Chapter 11 introduces a novel experimental method, photovoltaic mapping (PVMAP), which combines the use of non-damaging electrode and gradients in processing parameter to spatially map the photovoltaic properties of organic solar cells.
Subjects/Keywords: Chemical engineering; Nanotechnology; Conjugated Polymers; Mechanical Properties; Organic Electronics; Organic Solar Cells; Polymers; Stretchable Electronics
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APA (6th Edition):
Savagatrup, S. (2016). Semiconducting polymers for stretchable, ultra-flexible, and mechanically robust organic photovoltaics. (Thesis). University of California – San Diego. Retrieved from http://www.escholarship.org/uc/item/8p7441px
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Savagatrup, Suchol. “Semiconducting polymers for stretchable, ultra-flexible, and mechanically robust organic photovoltaics.” 2016. Thesis, University of California – San Diego. Accessed February 21, 2020.
http://www.escholarship.org/uc/item/8p7441px.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Savagatrup, Suchol. “Semiconducting polymers for stretchable, ultra-flexible, and mechanically robust organic photovoltaics.” 2016. Web. 21 Feb 2020.
Vancouver:
Savagatrup S. Semiconducting polymers for stretchable, ultra-flexible, and mechanically robust organic photovoltaics. [Internet] [Thesis]. University of California – San Diego; 2016. [cited 2020 Feb 21].
Available from: http://www.escholarship.org/uc/item/8p7441px.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Savagatrup S. Semiconducting polymers for stretchable, ultra-flexible, and mechanically robust organic photovoltaics. [Thesis]. University of California – San Diego; 2016. Available from: http://www.escholarship.org/uc/item/8p7441px
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Southern California
24.
Xu, Bing.
Influence of polymer structure on electronic properties and
performance as donor materials in bulk heterojunction solar
cells.
Degree: PhD, Chemistry, 2015, University of Southern California
URL: http://digitallibrary.usc.edu/cdm/compoundobject/collection/p15799coll3/id/541051/rec/3481
► Essential to the achievement of higher efficiencies in polymer:fullerene bulk heterojunction solar cells is the development of a polymer donor material that simultaneously meets the…
(more)
▼ Essential to the achievement of higher efficiencies in
polymer:fullerene bulk heterojunction solar cells is the
development of a polymer donor material that simultaneously meets
the requirements of a broad absorption profile, suitable energy
levels and a favorable morphology with fullerene derivatives. In an
effort to pursue the ideal polymer, copolymerizing electron‐rich
and electron‐poor monomers in a perfectly alternating manner
(alternating donor‐acceptor (D-A) copolymers) has produced
state‐of‐the‐art polymer samples through the “monomer approach”. As
an alternative strategy, polymer properties can be modulated by the
strategic combination of monomers through the “polymer approach”.
Following this concept, in particular, a number of random
copolymers have been reported in literature, revealing their
distinct advantages in the ease of synthesis, as well as in the
convenience and broad scope of property tuning ability. ❧ This
thesis has been inspired by the previous works on electroactive
polymers for organic photovoltaics that are synthesized through the
“polymer approach”, especially those with random
conjugated
backbones. Focus in this thesis is on the synthesis of
electroactive
polymers following the “polymer approach” and their
structure‐property relationships. Chapter 1 reviews the reported
examples of random
conjugated polymers in the context of organic
solar cell applications, with an emphasis on their synthetic
strategies, structure‐property relationships and photovoltaic
device performance. Several specific strategies to produce random
copolymers are recognized and discussed according to comonomer
structures and reaction features. In particular, three popular
strategies reviewed in Chapter 1, namely the random regioregular
polythiophenes, random D‐A copolymers and semi‐random D‐A
copolymers, will be reflected in the polymer structures reported in
Chapter 2, 3 and 4. In addition, a brief summary is included in
Chapter 1 on the advantages of random
conjugated copolymers,
especially in comparison to alternating D‐A copolymers. ❧ Chapter 2
describes the investigation of two sets of copolymers containing
varying percentages of strongly electron‐donating
3-hexyloxythiophene units (3HOT). The
polymers synthesized here
include both random regioregular polythiophenes and semi‐random
diketopyrrolopyrrole (DPP) ‐containing copolymers. The influence of
3HOT content on UV−Vis absorption, HOMO energy levels, polymer
crystallinity and polymer:fullerene solar cell performance,
especially the open‐circuit voltage (Voc), is discussed in detail.
Importantly, this study demonstrates that significant changes in
polymer electronic properties can be induced with only small
percentage of 3HOT comonomers in random and semi‐random
conjugated
polymers. ❧ Chapter 3 continues the investigation on the effect of
3HOT units on polymer properties, but with another parent polymer
based on alternating 2,7-carbazole and
dithienyl-2,1,3-benzothiadiazole. A 2,1,3-benzothiadiazole‐based
comonomer containing 3HOT units was used to replace…
Advisors/Committee Members: Thompson, Barry C. (Committee Chair), Prakash, G. K. Surya (Committee Member), Gupta, Malancha (Committee Member).
Subjects/Keywords: electro‐active polymers; random conjugated polymers; polymer bulk heterojunction solar cells; structure‐property relationship
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APA ·
Chicago ·
MLA ·
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CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Xu, B. (2015). Influence of polymer structure on electronic properties and
performance as donor materials in bulk heterojunction solar
cells. (Doctoral Dissertation). University of Southern California. Retrieved from http://digitallibrary.usc.edu/cdm/compoundobject/collection/p15799coll3/id/541051/rec/3481
Chicago Manual of Style (16th Edition):
Xu, Bing. “Influence of polymer structure on electronic properties and
performance as donor materials in bulk heterojunction solar
cells.” 2015. Doctoral Dissertation, University of Southern California. Accessed February 21, 2020.
http://digitallibrary.usc.edu/cdm/compoundobject/collection/p15799coll3/id/541051/rec/3481.
MLA Handbook (7th Edition):
Xu, Bing. “Influence of polymer structure on electronic properties and
performance as donor materials in bulk heterojunction solar
cells.” 2015. Web. 21 Feb 2020.
Vancouver:
Xu B. Influence of polymer structure on electronic properties and
performance as donor materials in bulk heterojunction solar
cells. [Internet] [Doctoral dissertation]. University of Southern California; 2015. [cited 2020 Feb 21].
Available from: http://digitallibrary.usc.edu/cdm/compoundobject/collection/p15799coll3/id/541051/rec/3481.
Council of Science Editors:
Xu B. Influence of polymer structure on electronic properties and
performance as donor materials in bulk heterojunction solar
cells. [Doctoral Dissertation]. University of Southern California; 2015. Available from: http://digitallibrary.usc.edu/cdm/compoundobject/collection/p15799coll3/id/541051/rec/3481
Georgia Tech
25.
Bakbak, Selma.
Structural manipulation of conjugated polymers.
Degree: PhD, Chemistry and Biochemistry, 2006, Georgia Tech
URL: http://hdl.handle.net/1853/10440
► The syntheses of new classes of conjugated polymers are presented. The synthesis of novel alkyne bridged trispyrazolylmethane ligands, their coordination behavior and their crystallographic properties…
(more)
▼ The syntheses of new classes of
conjugated polymers are presented. The synthesis of novel alkyne bridged trispyrazolylmethane ligands, their coordination behavior and their crystallographic properties are studied. A series of functionalized poly(paraphenyleneethynylene)s, PPEs, are produced by click chemistry with post and pre-polymerization. Unpredictable solid-state polymerizations of defect free
conjugated polythiophenes are investigated. Finally, by click chemistry aromatic diazides and aromatic diynes are coupled to produce a library of 1,2,3-triazoles and new
conjugated polymers, poly(arylenetriazoline)s.
Advisors/Committee Members: Dr. Uwe H. F. Bunz (Committee Chair), Dr. Anselm C. Griffin (Committee Member), Dr. David M. Collard (Committee Member), Dr. Joseph Perry (Committee Member), Dr. Laren M. Tolbert (Committee Member).
Subjects/Keywords: Organic chemistry; Conjugated polymers; Polymers; Conjugation
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APA ·
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APA (6th Edition):
Bakbak, S. (2006). Structural manipulation of conjugated polymers. (Doctoral Dissertation). Georgia Tech. Retrieved from http://hdl.handle.net/1853/10440
Chicago Manual of Style (16th Edition):
Bakbak, Selma. “Structural manipulation of conjugated polymers.” 2006. Doctoral Dissertation, Georgia Tech. Accessed February 21, 2020.
http://hdl.handle.net/1853/10440.
MLA Handbook (7th Edition):
Bakbak, Selma. “Structural manipulation of conjugated polymers.” 2006. Web. 21 Feb 2020.
Vancouver:
Bakbak S. Structural manipulation of conjugated polymers. [Internet] [Doctoral dissertation]. Georgia Tech; 2006. [cited 2020 Feb 21].
Available from: http://hdl.handle.net/1853/10440.
Council of Science Editors:
Bakbak S. Structural manipulation of conjugated polymers. [Doctoral Dissertation]. Georgia Tech; 2006. Available from: http://hdl.handle.net/1853/10440
26.
Tiitu, Mari.
Investigations of Functional Electroactive Polymers.
Degree: 2006, Helsinki University of Technology
URL: http://lib.tkk.fi/Diss/2006/isbn9512282240/
► Conjugated polymers containing pi-conjugated backbones form a scientifically and technologically important class of polymers. In their undoped form they are semiconductors, but they can be…
(more)
▼ Conjugated polymers containing pi-conjugated backbones form a scientifically and technologically important class of polymers. In their undoped form they are semiconductors, but they can be doped for electrical conductivity, and allow redox-activity, which all can lead to functional materials. One of the most important conjugated polymers in large scale applications is polyaniline due to its economics and good stability. Polyaniline is used for applications requiring conductivity as well as corrosion inhibition. In this thesis, conducting network structures based on acid doped polyaniline are prepared within solvent and polymer matrices, in order to investigate percolation phenomena. Self-assembled structures have been investigated to study confinement of the polyaniline chain in nanosized domains and its effects on conductivity. A concept was identified and patented to achieve a novel anticorrosion coating based on polyaniline/epoxy compositions. In some applications ionic or protonic conductivity is preferred instead of electronic conductivity. These include e.g. fuel cell membranes or applications where colorless conductive materials are needed. The thesis describes a model material for fuel cell membranes, where the mechanical and conductivity properties can be separately tailored due to self-assembly, as well as a novel material to allow colorless antistatic paper coatings.
Konjugoidut polymeerit, joissa on pii-konjugoituja pääketjuja, muodostavat tieteellisesti ja teknologisesti kiinnostavan ryhmän. Dooppaamattomassa muodossaan ne ovat puolijohteita, mutta ne voidaan doopata sähköä johtaviksi, ja niissä voi tapahtua sisäisiä hapetus-pelkistys -reaktiota. Tämä mahdollistaa funktionaaliset materiaalit. Polyaniliini on yksi tärkeimmistä suuren mittakaavan sovelluksissa käytettävistä konjugoiduista polymeereista sen taloudellisuuden ja stabiiliuden takia. Polyaniliinia käytetään sovelluksissa, joissa vaaditaan sähkönjohtavuutta tai korroosionestokykyä. Tässä väitöskirjassa valmistetaan hapolla doopattuun polyaniliiniin perustuvia johtavia verkostorakenteita liuos- ja polymeerimatriiseissa tarkoituksena tutkia perkolaatioilmiöitä. Itsejärjestyneitä rakenteita on tutkittu, jotta voidaan saada tietoa polyaniliiniketjun rajoittumisesta nanokokoisiin alueisiin ja tämän vaikutusta johtavuuteen. Väitöskirjassa on myös kehitetty ja tähän työhön perustuen patentoitu uudenlainen korroosiolta suojaava pinnoite, joka perustuu polyaniliiniin ja epoksiin. Tiettyihin sovelluksiin ioni- tai protonijohtavuus sopii paremmin kuin elektroninen johtavuus. Tällaisia ovat mm. polttokennokalvot, tai sovellukset, joissa tarvitaan värittömiä materiaaleja. Väitöskirja kuvaa polttokennokalvon mallimateriaalin, jossa mekaaniset ja sähköiset ominaisuudet ovat erikseen räätälöitävissä itsejärjestymisen ansiosta. Myös uudenlainen materiaali värittömiin antistaattisesti johtaviin paperin pinnoitteisiin kuvataan.
TKK dissertations, ISSN 1795-4584; 33
Advisors/Committee Members: Helsinki University of Technology, Department of Engineering Physics and Mathematics, Optics and Molecular Materials.
Subjects/Keywords: conjugated polymers; polyaniline; self-assembly; networks; konjugoidut polymeerit; polyaniliini; itsejärjestäytyminen; verkostot
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Record Details
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APA ·
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MLA ·
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CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Tiitu, M. (2006). Investigations of Functional Electroactive Polymers. (Thesis). Helsinki University of Technology. Retrieved from http://lib.tkk.fi/Diss/2006/isbn9512282240/
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Tiitu, Mari. “Investigations of Functional Electroactive Polymers.” 2006. Thesis, Helsinki University of Technology. Accessed February 21, 2020.
http://lib.tkk.fi/Diss/2006/isbn9512282240/.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Tiitu, Mari. “Investigations of Functional Electroactive Polymers.” 2006. Web. 21 Feb 2020.
Vancouver:
Tiitu M. Investigations of Functional Electroactive Polymers. [Internet] [Thesis]. Helsinki University of Technology; 2006. [cited 2020 Feb 21].
Available from: http://lib.tkk.fi/Diss/2006/isbn9512282240/.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Tiitu M. Investigations of Functional Electroactive Polymers. [Thesis]. Helsinki University of Technology; 2006. Available from: http://lib.tkk.fi/Diss/2006/isbn9512282240/
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Durham University
27.
Daik, Rusli.
Synthesis and characterisation of poly(arylene vinylene)s.
Degree: PhD, 1997, Durham University
URL: http://etheses.dur.ac.uk/5037/
;
http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.245381
► The synthesis of a series of poly(arylene vinylene)s via transition metals catalysed polycondensation with a view to producing well defined and clean samples for study…
(more)
▼ The synthesis of a series of poly(arylene vinylene)s via transition metals catalysed polycondensation with a view to producing well defined and clean samples for study , particularly for the incorporation of the material in light emitting devices has been described. Initially the McMurry reaction was applied in the synthesis of poly(4,4'-diphenylene diphenylvinylene). The reaction conditions have been optimised and relatively high molecular weight polymers with narrow molecular weight distributions were produced by fractionating the polymer. The feasibility of the McMurry reaction was established in the synthesis of related polymers; including poly(l,3-phenylene diphenylvinylene), poly(l,3-phenylene dimesitoylvinylene) and poly(4,4'-diphenylene-l,2-bis(pentafluorophenyl)vinylene). In other attempts the Yamamoto and Suzuki polycondensations were applied in the synthesis of structurally defined poly(arylene vinylene)s which could not be made via the route used earlier. Studies on UV-visible absorption, photoluminescence and electroluminescence properties of polymers produced were carried out and correlation between polymer structure and electro-optical properties of the polymer, particularly photoluminescence has been established.
Subjects/Keywords: 547; Conjugated polymers; Electroluminescence
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APA (6th Edition):
Daik, R. (1997). Synthesis and characterisation of poly(arylene vinylene)s. (Doctoral Dissertation). Durham University. Retrieved from http://etheses.dur.ac.uk/5037/ ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.245381
Chicago Manual of Style (16th Edition):
Daik, Rusli. “Synthesis and characterisation of poly(arylene vinylene)s.” 1997. Doctoral Dissertation, Durham University. Accessed February 21, 2020.
http://etheses.dur.ac.uk/5037/ ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.245381.
MLA Handbook (7th Edition):
Daik, Rusli. “Synthesis and characterisation of poly(arylene vinylene)s.” 1997. Web. 21 Feb 2020.
Vancouver:
Daik R. Synthesis and characterisation of poly(arylene vinylene)s. [Internet] [Doctoral dissertation]. Durham University; 1997. [cited 2020 Feb 21].
Available from: http://etheses.dur.ac.uk/5037/ ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.245381.
Council of Science Editors:
Daik R. Synthesis and characterisation of poly(arylene vinylene)s. [Doctoral Dissertation]. Durham University; 1997. Available from: http://etheses.dur.ac.uk/5037/ ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.245381
University of Hong Kong
28.
張偉基.; Cheung, Wai-kei.
Low band-gap donor-acceptor polymers and heterolyptic
ruthenium complex containing polymers for photovoltaic
applications.
Degree: M. Phil., 2012, University of Hong Kong
URL: Cheung,
W.
[張偉基].
(2012).
Low
band-gap
donor-acceptor
polymers
and
heterolyptic
ruthenium
complex
containing
polymers
for
photovoltaic
applications.
(Thesis).
University
of
Hong
Kong,
Pokfulam,
Hong
Kong
SAR.
Retrieved
from
http://dx.doi.org/10.5353/th_b4775300
;
http://dx.doi.org/10.5353/th_b4775300
;
http://hdl.handle.net/10722/174480
► A series of low band-gap conjugated polymers with intramolecular charge transfer properties were synthesized and bulk heterojunction devices based on these polymers were fabricated. The…
(more)
▼ A series of low band-gap conjugated polymers with
intramolecular charge transfer properties were synthesized and bulk
heterojunction devices based on these polymers were fabricated. The
electrochemical and photophysical properties of the polymers were
tuned by using different electron withdrawing molecules or
ruthenium complexes as the comonomer. Preliminary results suggested
that the electronic structures of the polymer were significantly
altered by the incorporation of different acceptor units. The
polymers also demonstrated intense absorption bands in the visible
region, indicating that they are suitable photoactive materials in
bulk heterojunction devices. The synthesis and characterization of
a series of organic donor-acceptor copolymers were studied. All of
the polymers contained alternating cyclopenta[2,1-
b:3,4-b’]dithiophene (CPDT) units. The effects of the different
acceptor monomers were evaluated. The electron-withdrawing
carboxylate and amide functional groups of the acceptors were found
to effectively stabilize the HOMO levels of the polymer, and the
optical band-gaps were significantly reduced. Bulk heterojunction
devices were fabricated using the polymers and 6,6-phenyl C61
butyric acid methyl ester (PCBM) as donors and acceptors
respectively. These devices exhibited high open circuit voltage
(Voc) up to 0.86 V. The extended photosensitizing range was
confirmed by the external quantum efficiency (EQE) spectra. The
device performance was further improved by optimizing the active
layer thickness and applying 1,8-diiodooctane in the blend
solution. A new synthetic route to novel ruthenium containing
polymers was also reported. [Ru(L)(L’)Cl2] complexes (L and L’ =
bidentate N^N ligands) with a dibromo-substituted ligand were found
to be polymerizable by Stille cross-coupling reaction. The
subsequent displacement of the chloride ligands by thiocyanate was
highly effective and the structures of the target polymers were
fully characterized. The main chain absorption showed a significant
red-shift upon metal coordination and the metal-to-ligand charge
transfer (MLCT) of the complex strengthens the photon harvesting
ability of the polymer. The dual function of these Ru(II) complexes
demonstrated a new avenue to develop new classes of optoelectronic
materials. The extent of _-delocalization of the ancillary ligands
also showed interesting effects on the electronic properties of the
polymers. Bulk heterojunction devices were fabricated. Photovoltaic
response was observed in these devices, and the device performance
can be improved by further modifying the surface morphology of the
blend films.
published_or_final_version
Chemistry
Master
Master of Philosophy
Advisors/Committee Members: Chan, WK.
Subjects/Keywords: Organic compounds - Synthesis.; Conjugated polymers.; Ruthenium compounds - Synthesis.
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APA ·
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MLA ·
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CSE |
Export
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APA (6th Edition):
張偉基.; Cheung, W. (2012). Low band-gap donor-acceptor polymers and heterolyptic
ruthenium complex containing polymers for photovoltaic
applications. (Masters Thesis). University of Hong Kong. Retrieved from Cheung, W. [張偉基]. (2012). Low band-gap donor-acceptor polymers and heterolyptic ruthenium complex containing polymers for photovoltaic applications. (Thesis). University of Hong Kong, Pokfulam, Hong Kong SAR. Retrieved from http://dx.doi.org/10.5353/th_b4775300 ; http://dx.doi.org/10.5353/th_b4775300 ; http://hdl.handle.net/10722/174480
Chicago Manual of Style (16th Edition):
張偉基.; Cheung, Wai-kei. “Low band-gap donor-acceptor polymers and heterolyptic
ruthenium complex containing polymers for photovoltaic
applications.” 2012. Masters Thesis, University of Hong Kong. Accessed February 21, 2020.
Cheung, W. [張偉基]. (2012). Low band-gap donor-acceptor polymers and heterolyptic ruthenium complex containing polymers for photovoltaic applications. (Thesis). University of Hong Kong, Pokfulam, Hong Kong SAR. Retrieved from http://dx.doi.org/10.5353/th_b4775300 ; http://dx.doi.org/10.5353/th_b4775300 ; http://hdl.handle.net/10722/174480.
MLA Handbook (7th Edition):
張偉基.; Cheung, Wai-kei. “Low band-gap donor-acceptor polymers and heterolyptic
ruthenium complex containing polymers for photovoltaic
applications.” 2012. Web. 21 Feb 2020.
Vancouver:
張偉基.; Cheung W. Low band-gap donor-acceptor polymers and heterolyptic
ruthenium complex containing polymers for photovoltaic
applications. [Internet] [Masters thesis]. University of Hong Kong; 2012. [cited 2020 Feb 21].
Available from: Cheung, W. [張偉基]. (2012). Low band-gap donor-acceptor polymers and heterolyptic ruthenium complex containing polymers for photovoltaic applications. (Thesis). University of Hong Kong, Pokfulam, Hong Kong SAR. Retrieved from http://dx.doi.org/10.5353/th_b4775300 ; http://dx.doi.org/10.5353/th_b4775300 ; http://hdl.handle.net/10722/174480.
Council of Science Editors:
張偉基.; Cheung W. Low band-gap donor-acceptor polymers and heterolyptic
ruthenium complex containing polymers for photovoltaic
applications. [Masters Thesis]. University of Hong Kong; 2012. Available from: Cheung, W. [張偉基]. (2012). Low band-gap donor-acceptor polymers and heterolyptic ruthenium complex containing polymers for photovoltaic applications. (Thesis). University of Hong Kong, Pokfulam, Hong Kong SAR. Retrieved from http://dx.doi.org/10.5353/th_b4775300 ; http://dx.doi.org/10.5353/th_b4775300 ; http://hdl.handle.net/10722/174480
University of Hong Kong
29.
張啓賢.; Cheung, Kai-yin.
Metallopolyyne polymers based bulk heterojunction (BHJ)
solar cells.
Degree: PhD, 2009, University of Hong Kong
URL: Cheung,
K.
[張啓賢].
(2009).
Metallopolyyne
polymers
based
bulk
heterojunction
(BHJ)
solar
cells.
(Thesis).
University
of
Hong
Kong,
Pokfulam,
Hong
Kong
SAR.
Retrieved
from
http://dx.doi.org/10.5353/th_b4284171
;
http://dx.doi.org/10.5353/th_b4284171
;
http://hdl.handle.net/10722/56464
published_or_final_version
Physics
Doctoral
Doctor of Philosophy
Advisors/Committee Members: Chan, WK, Djurisic, A.Subjects/Keywords: Photovoltaic cells - Materials.; Conjugated polymers.
Record Details
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Record Details
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
張啓賢.; Cheung, K. (2009). Metallopolyyne polymers based bulk heterojunction (BHJ)
solar cells. (Doctoral Dissertation). University of Hong Kong. Retrieved from Cheung, K. [張啓賢]. (2009). Metallopolyyne polymers based bulk heterojunction (BHJ) solar cells. (Thesis). University of Hong Kong, Pokfulam, Hong Kong SAR. Retrieved from http://dx.doi.org/10.5353/th_b4284171 ; http://dx.doi.org/10.5353/th_b4284171 ; http://hdl.handle.net/10722/56464
Chicago Manual of Style (16th Edition):
張啓賢.; Cheung, Kai-yin. “Metallopolyyne polymers based bulk heterojunction (BHJ)
solar cells.” 2009. Doctoral Dissertation, University of Hong Kong. Accessed February 21, 2020.
Cheung, K. [張啓賢]. (2009). Metallopolyyne polymers based bulk heterojunction (BHJ) solar cells. (Thesis). University of Hong Kong, Pokfulam, Hong Kong SAR. Retrieved from http://dx.doi.org/10.5353/th_b4284171 ; http://dx.doi.org/10.5353/th_b4284171 ; http://hdl.handle.net/10722/56464.
MLA Handbook (7th Edition):
張啓賢.; Cheung, Kai-yin. “Metallopolyyne polymers based bulk heterojunction (BHJ)
solar cells.” 2009. Web. 21 Feb 2020.
Vancouver:
張啓賢.; Cheung K. Metallopolyyne polymers based bulk heterojunction (BHJ)
solar cells. [Internet] [Doctoral dissertation]. University of Hong Kong; 2009. [cited 2020 Feb 21].
Available from: Cheung, K. [張啓賢]. (2009). Metallopolyyne polymers based bulk heterojunction (BHJ) solar cells. (Thesis). University of Hong Kong, Pokfulam, Hong Kong SAR. Retrieved from http://dx.doi.org/10.5353/th_b4284171 ; http://dx.doi.org/10.5353/th_b4284171 ; http://hdl.handle.net/10722/56464.
Council of Science Editors:
張啓賢.; Cheung K. Metallopolyyne polymers based bulk heterojunction (BHJ)
solar cells. [Doctoral Dissertation]. University of Hong Kong; 2009. Available from: Cheung, K. [張啓賢]. (2009). Metallopolyyne polymers based bulk heterojunction (BHJ) solar cells. (Thesis). University of Hong Kong, Pokfulam, Hong Kong SAR. Retrieved from http://dx.doi.org/10.5353/th_b4284171 ; http://dx.doi.org/10.5353/th_b4284171 ; http://hdl.handle.net/10722/56464
University of Minnesota
30.
Speros, Joshua Cole.
A metathesis route to light harvesting polymers for organic solar cells.
Degree: PhD, Chemistry, 2013, University of Minnesota
URL: http://purl.umn.edu/156237
► Conjugated polymers (CPs), macromolecules consisting of alternating single and double bonds, are of tremendous interest to the scientific community considering their applications in field-effect transistors,…
(more)
▼ Conjugated polymers (CPs), macromolecules consisting of alternating single and double bonds, are of tremendous interest to the scientific community considering their applications in field-effect transistors, light-emitting diodes, sensors, and organic photovoltaics (OPVs). OPVs are an area of particular interest because cost-effective solution processing techniques can be employed to prepare flexible large-area light harvesting devices. In addition, light absorption and charge transport characteristics may be tuned by synthetically altering the CP scaffold. This dissertation describes the synthesis of a variety of CPs prepared by acyclic diene metathesis (ADMET) polymerization using versatile ruthenium-based Grubbs catalysts. All polymers were based on the low band gap poly(thienylene vinylene) (PTV) scaffold. The influence of polymer molecular weight, composition, and repeat unit architecture on both individual polymer behavior and OPV performance was investigated systematically.
Subjects/Keywords: Conjugated Polymers; Metathesis; Organic photovoltaics; Organic solar cells
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Speros, J. C. (2013). A metathesis route to light harvesting polymers for organic solar cells. (Doctoral Dissertation). University of Minnesota. Retrieved from http://purl.umn.edu/156237
Chicago Manual of Style (16th Edition):
Speros, Joshua Cole. “A metathesis route to light harvesting polymers for organic solar cells.” 2013. Doctoral Dissertation, University of Minnesota. Accessed February 21, 2020.
http://purl.umn.edu/156237.
MLA Handbook (7th Edition):
Speros, Joshua Cole. “A metathesis route to light harvesting polymers for organic solar cells.” 2013. Web. 21 Feb 2020.
Vancouver:
Speros JC. A metathesis route to light harvesting polymers for organic solar cells. [Internet] [Doctoral dissertation]. University of Minnesota; 2013. [cited 2020 Feb 21].
Available from: http://purl.umn.edu/156237.
Council of Science Editors:
Speros JC. A metathesis route to light harvesting polymers for organic solar cells. [Doctoral Dissertation]. University of Minnesota; 2013. Available from: http://purl.umn.edu/156237
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Open Access Theses and Dissertations
