Performance evaluation of multi-junction solar cells by spatially resolved electroluminescence microscopy

被引：0
作者：
Lijing Kong
Zhiming Wu
Shanshan Chen
Yiyan Cao
Yong Zhang
Heng Li
Junyong Kang
机构：
[1] Xiamen University,Department of Physics, Fujian Key Laboratory of Semiconductor Materials and Applications
[2] Xiamen Changelight Co.,undefined
[3] Ltd,undefined
来源：
Nanoscale Research Letters | 2015年 / 10卷
关键词：
Multi-junction solar cells; Electroluminescence imaging; Quantum efficiency; Current matching;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
An electroluminescence microscopy combined with a spectroscopy was developed to visually analyze multi-junction solar cells. Triple-junction solar cells with different conversion efficiencies were characterized by using this system. The results showed that the mechanical damages and material defects in solar cells can be clearly distinguished, indicating a high-resolution imaging. The external quantum efficiency (EQE) measurements demonstrated that different types of defects or damages impacted cell performance in various degrees and the electric leakage mostly degraded the EQE. Meanwhile, we analyzed the relationship between electroluminescence intensity and short-circuit current density JSC. The results indicated that the gray value of the electroluminescence image corresponding to the intensity was almost proportional to JSC. This technology provides a potential way to evaluate the current matching status of multi-junction solar cells.
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