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University of Manchester

1. Ezenwa, Emmanuel Tagbo. N,N-diethyl-N’-naphthoylacylchalcogoureatometal (II)complexes as precursors for ternary metal chalcogenide thin films via AACVD.

Degree: 2016, University of Manchester

Emmanuel Tagbo EzenwaDoctor of Philosophy (PhD)N,N-diethyl–N’-naphthoylacylchalcogoureatometal(II)complexes as precursors for ternary metal chalcogenide thin film via AACVDAbstractIn this thesis complexes of acylchalcogoureas with cadmium (II), lead (II) and nickel (II) have been synthesised and investigated as single source precursors for the formation of metal chalcogenide thin films viaaerosol assisted chemical vapour deposition (AACVD). Routes to binary thin films have been explored using homoleptic complexes of the general structure bis(N,N-diethyl-N’-naphthoylchalcogoureato)metal(II). Analysis of the thin films produced showed the successful deposition of the binary materials from the synthesised complexes when characterised by powder XRD, ICP-OES, SEM and EDX.Routes to ternary thin films with the general structure MExE’1-x, where M represents a metal (Cd, Ni and Pb); and E chalcogen (S or Se) have been investigated using heteroleptic metal complexes of cadmium, nickel or lead including different chalcogen containing N,N-diethyl-N’-naphthoylchalcogoureato ligands and diethyldithiocarbamate. The precursors were fully characterised and novel compounds had their crystal structures determined. The heteroleptic complexes were thermolysed by AACVD forming the MExE’1-x thin films. In the cases of lead, nickel and cadmium the thin films produced showed that the composition of the film tended heavily towards the metal selenide.Ternary films of type MS1-xSex was prepared by mixing their binary precursors of type bis(N,N–diethyl-N’-naphthoylselenoureato)metal(II) and bis(N,N-diethyl-N’-naphthoylthioureato)metal(II) [metal = Cd, Ni and Pb]. In the case of lead and cadmium chalcogenide films variation of the ratio of sulphur and selenium containing precursors allowed for the full transition in composition between metal sulphide and metal selenide. In the case of CdS1-xSexthe band gap of the films was determined from UV-visible spectroscopy to vary from 2.4 eV (CdS) to 1.7 eV(CdSe). In the case of NiS1-xSex the movement from sulphide to selenide was less simple with multiple phases of nickel chalcogenides produced.

NMR DATA ON SAMPLES PREPARED AND ANALYSED IN THE PROGRAMME.

Advisors/Committee Members: WINPENNY, RICHARD REP, O'Brien, Paul, Winpenny, Richard.

Subjects/Keywords: ELEMENTAL ANALYSIS; TGA; AACVD; HOMOLEPTIC PRECURSORS; MIXED LIGAND PRECURSORS; TERNARY MATERIALS; NMR; IR; POWDER XRD; SEM; EDX; ICPOES; DEPOSITION TEMPEFATURES

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Ezenwa, E. T. (2016). N,N-diethyl-N’-naphthoylacylchalcogoureatometal (II)complexes as precursors for ternary metal chalcogenide thin films via AACVD. (Doctoral Dissertation). University of Manchester. Retrieved from http://www.manchester.ac.uk/escholar/uk-ac-man-scw:302608

Chicago Manual of Style (16th Edition):

Ezenwa, Emmanuel Tagbo. “N,N-diethyl-N’-naphthoylacylchalcogoureatometal (II)complexes as precursors for ternary metal chalcogenide thin films via AACVD.” 2016. Doctoral Dissertation, University of Manchester. Accessed October 16, 2019. http://www.manchester.ac.uk/escholar/uk-ac-man-scw:302608.

MLA Handbook (7th Edition):

Ezenwa, Emmanuel Tagbo. “N,N-diethyl-N’-naphthoylacylchalcogoureatometal (II)complexes as precursors for ternary metal chalcogenide thin films via AACVD.” 2016. Web. 16 Oct 2019.

Vancouver:

Ezenwa ET. N,N-diethyl-N’-naphthoylacylchalcogoureatometal (II)complexes as precursors for ternary metal chalcogenide thin films via AACVD. [Internet] [Doctoral dissertation]. University of Manchester; 2016. [cited 2019 Oct 16]. Available from: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:302608.

Council of Science Editors:

Ezenwa ET. N,N-diethyl-N’-naphthoylacylchalcogoureatometal (II)complexes as precursors for ternary metal chalcogenide thin films via AACVD. [Doctoral Dissertation]. University of Manchester; 2016. Available from: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:302608

2. Ezenwa, Emmanuel. N,N-diethyl-N'-naphthoylacylchalcogourea to metal (II)complexes as precursors for ternary metal chalcogenide thin films via AACVD.

Degree: PhD, 2016, University of Manchester

In this thesis complexes of acylchalcogoureas with cadmium (II), lead (II) and nickel (II) have been synthesised and investigated as single source precursors for the formation of metal chalcogenide thin films viaaerosol assisted chemical vapour deposition (AACVD). Routes to binary thin films have been explored using homoleptic complexes of the general structure bis(N,N-diethyl-N'-naphthoylchalcogoureato)metal(II). Analysis of the thin films produced showed the successful deposition of the binary materials from the synthesised complexes when characterised by powder XRD, ICP-OES, SEM and EDX. Routes to ternary thin films with the general structure MExE'1-x, where M represents a metal (Cd, Ni and Pb); and E chalcogen (S or Se) have been investigated using heteroleptic metal complexes of cadmium, nickel or lead including different chalcogen containing N,N-diethyl-N'-naphthoylchalcogoureato ligands and diethyldithiocarbamate. The precursors were fully characterised and novel compounds had their crystal structures determined. The heteroleptic complexes were thermolysed by AACVD forming the MExE'1-x thin films. In the cases of lead, nickel and cadmium the thin films produced showed that the composition of the film tended heavily towards the metal selenide. Ternary films of type MS1-xSex was prepared by mixing their binary precursors of type bis(N,N-diethyl-N'-naphthoylselenoureato)metal(II) and bis(N,N-diethyl-N'-naphthoylthioureato)metal(II) [metal = Cd, Ni and Pb]. In the case of lead and cadmium chalcogenide films variation of the ratio of sulphur and selenium containing precursors allowed for the full transition in composition between metal sulphide and metal selenide. In the case of CdS1-xSexthe band gap of the films was determined from UV-visible spectroscopy to vary from 2.4 eV (CdS) to 1.7 eV(CdSe). In the case of NiS1-xSex the movement from sulphide to selenide was less simple with multiple phases of nickel chalcogenides produced.

Subjects/Keywords: 546; elemental analysis; TGA; AACVD; homoleptic precursors; mixed ligand precursors; ternary materials; NMR; IR; powder XRD; SEM; EDX; ICPOES; deposition temperatures

Record DetailsSimilar RecordsGoogle PlusoneFacebookTwitterCiteULikeMendeleyreddit

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Ezenwa, E. (2016). N,N-diethyl-N'-naphthoylacylchalcogourea to metal (II)complexes as precursors for ternary metal chalcogenide thin films via AACVD. (Doctoral Dissertation). University of Manchester. Retrieved from https://www.research.manchester.ac.uk/portal/en/theses/nndiethylnnaphthoylacylchalcogoureatometal-iicomplexes-as-precursors-for-ternary-metal-chalcogenide-thin-films-via-aacvd(85420a4c-89d4-4465-9734-ca40a75ba924).html ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.727876

Chicago Manual of Style (16th Edition):

Ezenwa, Emmanuel. “N,N-diethyl-N'-naphthoylacylchalcogourea to metal (II)complexes as precursors for ternary metal chalcogenide thin films via AACVD.” 2016. Doctoral Dissertation, University of Manchester. Accessed October 16, 2019. https://www.research.manchester.ac.uk/portal/en/theses/nndiethylnnaphthoylacylchalcogoureatometal-iicomplexes-as-precursors-for-ternary-metal-chalcogenide-thin-films-via-aacvd(85420a4c-89d4-4465-9734-ca40a75ba924).html ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.727876.

MLA Handbook (7th Edition):

Ezenwa, Emmanuel. “N,N-diethyl-N'-naphthoylacylchalcogourea to metal (II)complexes as precursors for ternary metal chalcogenide thin films via AACVD.” 2016. Web. 16 Oct 2019.

Vancouver:

Ezenwa E. N,N-diethyl-N'-naphthoylacylchalcogourea to metal (II)complexes as precursors for ternary metal chalcogenide thin films via AACVD. [Internet] [Doctoral dissertation]. University of Manchester; 2016. [cited 2019 Oct 16]. Available from: https://www.research.manchester.ac.uk/portal/en/theses/nndiethylnnaphthoylacylchalcogoureatometal-iicomplexes-as-precursors-for-ternary-metal-chalcogenide-thin-films-via-aacvd(85420a4c-89d4-4465-9734-ca40a75ba924).html ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.727876.

Council of Science Editors:

Ezenwa E. N,N-diethyl-N'-naphthoylacylchalcogourea to metal (II)complexes as precursors for ternary metal chalcogenide thin films via AACVD. [Doctoral Dissertation]. University of Manchester; 2016. Available from: https://www.research.manchester.ac.uk/portal/en/theses/nndiethylnnaphthoylacylchalcogoureatometal-iicomplexes-as-precursors-for-ternary-metal-chalcogenide-thin-films-via-aacvd(85420a4c-89d4-4465-9734-ca40a75ba924).html ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.727876

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