缺陷太阳电池EL图像及伏安特性分析

本文基于电致发光（Electroluminescence，EL）的理论，利用红外检测的方法，通过CCD近红外相机实验检测出了晶体硅太阳电池中存在的隐性缺陷，如隐裂、断栅、电阻不均匀、花片等，并将可见光下电池图像与EL图像进行对比。对存在缺陷的太阳电池进行了伏安特性测试，得出隐裂缺陷对太阳电池伏安特性、填充因子、效率等性能的影响，也证明电致发光技术检测太阳电池缺陷的准确性。

Electroluminescence Images and I-V Characteristic Analysis of Defective Crystalline Silicon Solar Cells

Based on Electroluminescence （EL） theory, the micro-cracks of crystalline silicon solar cells were detected by the near-infrared CCD camera, such as the cracks, off-grid, non-uniform resistance, flower slice. Then we compared the EL images with the images under visible light. I-V characteristic of the defective solar cells was tested, and we got that the defects would affect the I-V curve, fill factor, efficiency of the solar cell, meanwhile EL technology is proved to be an accurate measurement to detect solar cells.