Abstract CIGS solar cells with power conversion efficiency (PCE) in the range of 1.82%–12.30% were obtained by using two-step process, and were further analyzed through various measurement techniques. Material parameters showed diverse values and some trends depending on the device performance. The lower performance device showed small integrated PL intensity, short minority life time, larger defect density and lower activation energy, whereas the higher performance device showed opposite values. We investigated relationship between material parameters and PCE of solar cells, and found that some physical parameters such as integrated PL intensity, minority life time, defect density, and difference between band gap and activation energy (Eg-Ea), which all reflect defect states in bulk and at pn interface, are strongly related with PCE and would be used as a good indicator to evaluate device performance quickly.

中文翻译：

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与器件性能相关的CIGS太阳能电池的特征材料参数

摘要 通过两步法获得了功率转换效率（PCE）在1.82%~12.30%范围内的CIGS太阳能电池，并通过各种测量技术进行了进一步分析。材料参数显示出不同的值和一些趋势，具体取决于器件性能。性能较低的器件显示出较小的积分 PL 强度、较短的少数寿命、较大的缺陷密度和较低的活化能，而性能较高的器件则显示出相反的值。我们研究了太阳能电池的材料参数与 PCE 之间的关系，发现一些物理参数，如积分 PL 强度、少数寿命、缺陷密度、带隙和活化能之间的差异 (Eg-Ea)，都反映了缺陷状态批量和在 pn 接口，