White, red and blue light-induced metastabilities in Cu2ZnSnS 4 (Se 4 ) solar cells were investigated by temperature dependent current-voltage measurements, drive level capacitance profiling, impedance and thermal admittance spectroscopy. A set of devices were studied where white and blue light soaking at room temperature led to degradation of the device performance, while after red light soaking the solar cell efficiency did not change. We observed a significant effect of light soaking on capacitance data measured in both low and high-temperature ranges for these devices. In particular, the net doping concentration extracted from drive-level capacitance profiling substantially increased after light soaking treatments. Low and high-temperature capacitance steps observed in the reference capacitance-frequency spectra were assigned to Fermi level pinning and bulk defects, correspondingly. Light soaking with different-wavelength light led to a shift ...

中文翻译：

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CuZnSnSSe薄膜太阳能电池光致亚稳的电流电压和电容研究

通过与温度相关的电流-电压测量，驱动级电容分析，阻抗和热导率光谱研究了Cu2ZnSnS 4（Se 4）太阳能电池中白光，红光和蓝光引起的亚稳态。研究了一组器件，其中室温下浸泡白光和蓝光会导致器件性能下降，而浸泡红光后太阳能电池的效率不会改变。我们观察到光浸泡对这些器件在低温和高温范围内测得的电容数据的显着影响。特别地，在光浸泡处理之后，从驱动级电容轮廓提取的净掺杂浓度显着增加。在参考电容-频谱中观察到的低温和高温电容阶跃分别对应于费米能级钉扎和体缺陷。用不同波长的光浸泡导致了光的偏移