Temperature-dependent electroluminescence and voltages of multi-junction solar cells

被引：16
作者：
Karcher, Christian [1 ]
Helmers, Henning [1 ]
Schachtner, Michael [1 ]
Dimroth, Frank [1 ]
Bett, Andreas W. [1 ]
机构：
[1] Fraunhofer Inst Solar Energy Syst ISE, D-79110 Freiburg, Germany
来源：
PROGRESS IN PHOTOVOLTAICS | 2014年 / 22卷 / 07期
关键词：
III-V semiconductors; multi-junction solar cells; electroluminescence; temperature dependence; CPV; space;
D O I：
10.1002/pip.2431
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 spectral electroluminescence of a monolithic triple-junction solar cell reveals the sub-cell open-circuit voltages under variation of temperature and carrier concentration. We present an electroluminescence set-up that is able to acquire a full spectrum in less than 10s and give insight into the voltage-extraction process. The sum of the sub-cell voltages is in excellent agreement to open-circuit voltages acquired under concentrated illumination. The temperature-induced voltage losses are investigated and explained by a bandgap dependent increase in intrinsic carrier concentration. Finally, the accurate extraction of the sub-cell bandgaps helps to identify a temperature rise with increasing current density. Copyright (c) 2013 John Wiley & Sons, Ltd.
引用
收藏
页码：757 / 763
页数：7
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