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Effects of Cd1-xZnxS alloy composition and post-deposition air anneal on ultra-thin CdTe solar cells produced by MOCVD

Clayton, AJ, Baker, Mark, Babar, S, Grilli, R, Gibson, PN, Kartopu, G, Lamb, DA, Barrioz, V and Irvine, SJC (2017) Effects of Cd1-xZnxS alloy composition and post-deposition air anneal on ultra-thin CdTe solar cells produced by MOCVD Materials Chemistry and Physics, 192. pp. 244-252.

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Abstract

Ultra-thin CdTe:As/Cd1-xZnxS photovoltaic solar cells with an absorber thickness of 0.5 µm were deposited by metal-organic chemical vapour deposition on indium tin oxide coated boro-aluminosilicate substrates. The Zn precursor concentration was varied to compensate for Zn leaching effects after CdCl2 activation treatment. Analysis of the solar cell composition and structure by X-ray photoelectron spectroscopy depth profiling and X-ray diffraction showed that higher concentrations of Zn in the Cd1-xZnxS window layer resulted in suppression of S diffusion across the CdTe/Cd1-xZnxS interface after CdCl2 activation treatment. Excessive Zn content in the Cd1-xZnxS alloy preserved the spectral response in the blue region of the solar spectrum, but increased series resistance for the solar cells. A modest increase in the Zn content of the Cd1-xZnxS alloy together with a post-deposition air anneal resulted in an improved blue response and an enhanced open circuit voltage and fill factor. This device yielded a mean efficiency of 8.3% over 8 cells (0.25 cm2 cell area) and best cell efficiency of 8.8%.

Item Type: Article
Subjects : Mechanical Engineering Science
Divisions : Faculty of Engineering and Physical Sciences > Mechanical Engineering Sciences
Authors :
NameEmailORCID
Clayton, AJUNSPECIFIEDUNSPECIFIED
Baker, MarkM.Baker@surrey.ac.ukUNSPECIFIED
Babar, SUNSPECIFIEDUNSPECIFIED
Grilli, RUNSPECIFIEDUNSPECIFIED
Gibson, PNUNSPECIFIEDUNSPECIFIED
Kartopu, GUNSPECIFIEDUNSPECIFIED
Lamb, DAUNSPECIFIEDUNSPECIFIED
Barrioz, VUNSPECIFIEDUNSPECIFIED
Irvine, SJCUNSPECIFIEDUNSPECIFIED
Date : 25 January 2017
Identification Number : 10.1016/j.matchemphys.2017.01.067
Copyright Disclaimer : © 2017 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
Related URLs :
Depositing User : Symplectic Elements
Date Deposited : 25 Jan 2017 16:40
Last Modified : 07 Jul 2017 10:37
URI: http://epubs.surrey.ac.uk/id/eprint/813366

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