Laser beam induced current measurements of Cd1-xZnxS/CdTe solar cells

被引：24

作者：

Brooks, W. S. M. ^{[1
]}

Irvine, S. J. C. ^{[1
]}

Barrioz, V. ^{[1
]}

Clayton, A. J. ^{[1
]}

机构：

[1] OpT1C Glyndwr, Ctr Solar Energy Res, St Asaph LL17 0JD, Denbigh, Wales

来源：

SOLAR ENERGY MATERIALS AND SOLAR CELLS | 2012年 / 101卷

基金：

英国工程与自然科学研究理事会;

关键词：

CdZnS; CdTe; Open-circuit voltage; Photoresponse; Laser; THIN-FILMS; ELECTRON;

D O I：

10.1016/j.solmat.2012.02.006

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

The role of the window layer in Cd1-xZnxS/CdTe photovoltaic (PV) device structures was investigated using a triple wavelength laser beam induced current (LBIC) technique. Full pn structures were deposited using metal organic chemical vapour deposition (MOCVD). The triple wavelength LBIC technique allowed for the diagnostic analysis of carrier collection uniformity at 3 wavelength dependent photon penetration depths, delta(p). An assessment of the Cd1-xZnxS window layer film thickness and surface coverage showed a correlation between lateral device performance and window layer thickness distribution. Islands of thick Cd1-xZnxS were shown to increase localised blue absorption, correlating to isolated regions of increased red and IR photoresponse. Overall device open-circuit voltage, V-oc is shown to demonstrate a linear dependence on thick (similar to 300 nm) Cd1-xZnxS surface coverage. V-oc and shunt resistance R-sh losses attributed to the window layer were found to jointly contribute to the overall cell efficiency losses. A non-uniform pin-hole distribution, leading to R-sh loss, was found to be independent of the overall Cd1-xZnxS thickness distribution; thus the triple wavelength LBIC measurement was able to identify causes for the observed losses in both V-oc and R-sh. (C) 2012 Elsevier B.V. All rights reserved.

引用

页码：26 / 31

页数：6

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