Advanced search options

Advanced Search Options 🞨

Browse by author name (“Author name starts with…”).

Find ETDs with:

in
/  
in
/  
in
/  
in

Written in Published in Earliest date Latest date

Sorted by

Results per page:

You searched for subject:(Jsc enhancement). One record found.

Search Limiters

Last 2 Years | English Only

No search limiters apply to these results.

▼ Search Limiters


University of New South Wales

1. Wang, Qian. Light trapping for electron-beam evaporated polycrystalline silicon solar cells.

Degree: Photovoltaics & Renewable Energy Engineering, 2013, University of New South Wales

Effective light trapping is critical for polycrystalline silicon (poly-Si) thin-film solar cells to generate sufficiently high photocurrent. Glass substrate texturing is a standard and very effective light-trapping approach for poly-Si solar cells fabricated by plasma enhanced chemical vapour deposition but it cannot be applied to poly-Si cells deposited by electron beam (e-beam) evaporation, which is a preferred deposition process. Attempts to develop effective light trapping for e-beam poly-Si cells, by texturing of either glass substrate or poly-Si film itself has been studied in this thesis. A spray etching method is designed for glass texturing, but it is proved not to be suitable for producing light trapping textures. Light trapping is then implemented by texturing of the rear surface of e-beam poly-Si films deposited on planar glass. Water-based solutions of KOH, NH4F and NH4F/H2O2 are found to be able to texture poly-Si films and, thus, to significantly improve light-trapping. The related texturing processes and resulting textures are characterised by Si etching rates, the surface roughness versus removed Si thickness, texture angle distributions, optical absorption and spectral response enhancement. Both 2.5% KOH and NH4F-only texturing are found to provide roughness over 200 nm RMS, steep peak feature angles up to 20˚ and higher absorption enhancement of 30~40% compared to planar films. With a removed Si thickness of less than 2 µm, NH4F-only texturing provides more advantages than 2.5% KOH etching. In order to apply this etch-back texturing to functional e-beam cells, a new spin-on diffused back-surface-field (BSF) subsequent to the texturing process has been successfully developed and therefore the short-circuit current (Jsc) enhancement with various etch-back texturing can be compared. A 3.6 µm thick e-beam cell with KOH etch-back texturing was demonstrated ~21% Jsc enhancement compared to a reference planar cell with a rear reflector and a 3 µm thick e-beam cell with NH4F-based texturing is achieved even higher Jsc enhancement of 28%. Thus, it is demonstrated that a wet-chemical etch-back texturing is a very promising approach to light-trapping in e-beam cells on planar substrates.

Subjects/Keywords: Jsc enhancement; Light-trapping; Texturing

Record DetailsSimilar RecordsGoogle PlusoneFacebookTwitterCiteULikeMendeleyreddit

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

APA (6th Edition):

Wang, Q. (2013). Light trapping for electron-beam evaporated polycrystalline silicon solar cells. (Doctoral Dissertation). University of New South Wales. Retrieved from http://handle.unsw.edu.au/1959.4/53288 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:11983/SOURCE02?view=true

Chicago Manual of Style (16th Edition):

Wang, Qian. “Light trapping for electron-beam evaporated polycrystalline silicon solar cells.” 2013. Doctoral Dissertation, University of New South Wales. Accessed November 13, 2019. http://handle.unsw.edu.au/1959.4/53288 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:11983/SOURCE02?view=true.

MLA Handbook (7th Edition):

Wang, Qian. “Light trapping for electron-beam evaporated polycrystalline silicon solar cells.” 2013. Web. 13 Nov 2019.

Vancouver:

Wang Q. Light trapping for electron-beam evaporated polycrystalline silicon solar cells. [Internet] [Doctoral dissertation]. University of New South Wales; 2013. [cited 2019 Nov 13]. Available from: http://handle.unsw.edu.au/1959.4/53288 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:11983/SOURCE02?view=true.

Council of Science Editors:

Wang Q. Light trapping for electron-beam evaporated polycrystalline silicon solar cells. [Doctoral Dissertation]. University of New South Wales; 2013. Available from: http://handle.unsw.edu.au/1959.4/53288 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:11983/SOURCE02?view=true

.