A 350 W xenon light source (ShangHai) was used to provide the J-V curves under an incident irradiance of AM 1.5G (100 mW/cm2) for solar cells. EIS analyses were conducted with the bias voltage set at an applied voltage of 0.8 V and the frequency set from 0.1 Hz to 100 kHz with oscillation amplitude of 5 mV at AM 1.5G (100 mW/cm2).