A photoluminescence study of polycrystalline thin-film CdTe/CdS solar cells

被引:46
作者
Halliday, DP [1 ]
Eggleston, JM [1 ]
Durose, K [1 ]
机构
[1] Univ Durham, Dept Phys, Sci Labs, Durham DH1 3LE, England
基金
英国工程与自然科学研究理事会;
关键词
CdTe/CdS; solar cell; photoluminescence;
D O I
10.1016/S0022-0248(97)00819-1
中图分类号
O7 [晶体学];
学科分类号
0702 ; 070205 ; 0703 ; 080501 ;
摘要
The structures studied here are photovoltaic cells composed of indium tin oxide (ITO) coated glass, 500 nm of CdS and 5 mu m of CdTe. The devices are grown by close-space sublimation (CSS). The as-grown cells have a photovoltaic efficiency of eta = 0.8%. Following deposition of CdCl2 and annealing in air at 400 degrees C, the efficiency increases to around 10%. A study of the cells is made by examining the variation in the photoluminescence from the surface of the CdTe layer with laser power and sample temperature for an as-grown cell, an air-annealed cell and a cell which has undergone CdCl2 treatment. Three luminescence bands are observed at 1.590, 1.555 and 1.45 eV. These are attributed to shallow donor and acceptor bound excitons, a free to bound transition and a deep-level acceptor complex. The observed emissions are analysed and correlated to the changes in the cell characteristics. (C) 1998 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:543 / 549
页数:7
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