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Title: The effect of temperature on resistive ZnO layers and the performance of thin film CdTe solar cells
Authors: Bittau, Francesco
Abbas, Ali
Barth, Kurt L.
Bowers, Jake W.
Walls, Michael
Keywords: Cadmium telluride
Zinc oxide
Thin films
Electrical resistivity
Solar cells
Issue Date: 2016
Publisher: Elsevier © The Authors
Citation: BITTAU, F. ... et al, 2016. The effect of temperature on resistive ZnO layers and the performance of thin film CdTe solar cells. Thin Solid Films, doi:10.1016/j.tsf.2016.10.068.
Abstract: The use of a highly resistive transparent (HRT) layer has been shown to increase the efficiency of thin film CdTe heterostructure solar cells incorporating a thin CdS layer. In this study ZnO HRT layers were deposited at different substrate temperatures on soda lime glass and on fluorine-doped tin oxide-coated glass to enable structural, optical and electrical characterization. The performance of equivalent films was tested within CdS/CdTe solar cells. The ZnO thickness was limited to 150 nm, whilst the substrate temperature was varied from 20 °C to 400 °C during deposition. X-ray diffraction patterns and transmission electron microscopy of the cross-sectional microstructure of completed devices showed that the growth of the ZnO is improved when the films are deposited at higher temperatures. Film resistivity was lowest at 100 °C and highest at 400 °C, ranging from 10− 2 Ω·cm to 0.33 Ω·cm. The high temperature deposited ZnO exhibits improved micro-structural growth and an improvement in device efficiency.
Description: This is an Open Access Article. It is published by Elsevier under the Creative Commons Attribution 4.0 Unported Licence (CC BY). Full details of this licence are available at: http://creativecommons.org/licenses/by/4.0/
Sponsor: EPSRC SUPERGEN SuperSolar Hub funding (EP/J017361/1).
Version: Published
DOI: 10.1016/j.tsf.2016.10.068
URI: https://dspace.lboro.ac.uk/2134/23406
Publisher Link: http://dx.doi.org/10.1016/j.tsf.2016.10.068
ISSN: 0040-6090
Appears in Collections:Published Articles (Mechanical, Electrical and Manufacturing Engineering)

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