Cadmium chloride-assisted re-crystallization of CdTe: the effect of annealing over-treatment

Although the cadmium chloride treatment is an essential process for high efficiency thin film cadmium telluride photovoltaic devices, the precise mechanisms involved that improve the cadmium telluride layer are not fully understood. The treatment parameters have a narrow window, deviating from these...

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Main Authors:	Ali Abbas, Geoff West, Jake Bowers, Piotr Kaminski, Bianca Maniscalco, Michael Walls, Kurt L. Barth, Walajabad S. Sampath
Format:	Default Conference proceeding
Published:	2014
Subjects:	Mechanical engineering not elsewhere classified Cadmium chloride Solar cells Cadmium telluride Mechanical Engineering not elsewhere classified
Online Access:	https://hdl.handle.net/2134/15678
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id	rr-article-9554921
record_format	Figshare
spelling	rr-article-95549212014-01-01T00:00:00Z Cadmium chloride-assisted re-crystallization of CdTe: the effect of annealing over-treatment Ali Abbas (1253115) Geoff West (1250307) Jake Bowers (1253037) Piotr Kaminski (1253163) Bianca Maniscalco (7204187) Michael Walls (1251705) Kurt L. Barth (7204814) Walajabad S. Sampath (4951075) Mechanical engineering not elsewhere classified Cadmium chloride Solar cells Cadmium telluride Mechanical Engineering not elsewhere classified Although the cadmium chloride treatment is an essential process for high efficiency thin film cadmium telluride photovoltaic devices, the precise mechanisms involved that improve the cadmium telluride layer are not fully understood. The treatment parameters have a narrow window, deviating from these even slightly can be detrimental to cell performance. In this investigation we apply advanced microstructural characterization techniques to study the effects of varying two parameters: the temperature of the substrate during the cadmium chloride treatment and the length of time of the treatment. In both cases, the devices have been deliberately over-treated. The effect of the over-treatment on the microstructure of cadmium telluride solar cells, deposited by close spaced sublimation is investigated and related to cell performance. A range of techniques has been used to observe the changes to the microstructure as well as the chemical and crystallographic changes as a function of treatment parameters. Electrical tests that link the device performance with the microstructural properties of the cells have also been undertaken. Techniques used include Transmission Electron Microscopy (TEM) for sub-grain analysis, EDX for chemical analysis and XPS for composition-depth profiling. 2014-01-01T00:00:00Z Text Conference contribution 2134/15678 https://figshare.com/articles/conference_contribution/Cadmium_chloride-assisted_re-crystallization_of_CdTe_the_effect_of_annealing_over-treatment/9554921 CC BY-NC-ND 4.0
institution	Loughborough University
collection	Figshare
topic	Mechanical engineering not elsewhere classified Cadmium chloride Solar cells Cadmium telluride Mechanical Engineering not elsewhere classified
spellingShingle	Mechanical engineering not elsewhere classified Cadmium chloride Solar cells Cadmium telluride Mechanical Engineering not elsewhere classified Ali Abbas Geoff West Jake Bowers Piotr Kaminski Bianca Maniscalco Michael Walls Kurt L. Barth Walajabad S. Sampath Cadmium chloride-assisted re-crystallization of CdTe: the effect of annealing over-treatment
description	Although the cadmium chloride treatment is an essential process for high efficiency thin film cadmium telluride photovoltaic devices, the precise mechanisms involved that improve the cadmium telluride layer are not fully understood. The treatment parameters have a narrow window, deviating from these even slightly can be detrimental to cell performance. In this investigation we apply advanced microstructural characterization techniques to study the effects of varying two parameters: the temperature of the substrate during the cadmium chloride treatment and the length of time of the treatment. In both cases, the devices have been deliberately over-treated. The effect of the over-treatment on the microstructure of cadmium telluride solar cells, deposited by close spaced sublimation is investigated and related to cell performance. A range of techniques has been used to observe the changes to the microstructure as well as the chemical and crystallographic changes as a function of treatment parameters. Electrical tests that link the device performance with the microstructural properties of the cells have also been undertaken. Techniques used include Transmission Electron Microscopy (TEM) for sub-grain analysis, EDX for chemical analysis and XPS for composition-depth profiling.
format	Default Conference proceeding
author	Ali Abbas Geoff West Jake Bowers Piotr Kaminski Bianca Maniscalco Michael Walls Kurt L. Barth Walajabad S. Sampath
author_facet	Ali Abbas Geoff West Jake Bowers Piotr Kaminski Bianca Maniscalco Michael Walls Kurt L. Barth Walajabad S. Sampath
author_sort	Ali Abbas (1253115)
title	Cadmium chloride-assisted re-crystallization of CdTe: the effect of annealing over-treatment
title_short	Cadmium chloride-assisted re-crystallization of CdTe: the effect of annealing over-treatment
title_full	Cadmium chloride-assisted re-crystallization of CdTe: the effect of annealing over-treatment
title_fullStr	Cadmium chloride-assisted re-crystallization of CdTe: the effect of annealing over-treatment
title_full_unstemmed	Cadmium chloride-assisted re-crystallization of CdTe: the effect of annealing over-treatment
title_sort	cadmium chloride-assisted re-crystallization of cdte: the effect of annealing over-treatment
publishDate	2014
url	https://hdl.handle.net/2134/15678
_version_	1797104813376274432

Cadmium chloride-assisted re-crystallization of CdTe: the effect of annealing over-treatment

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