Changing in irradiation behavior and temperature-coefficient variation caused by light-induced degradation of a-Si/μc-Si solar cells

In our work we observe the light behavior before and after light-induced degradation of amorphous/microcrystalline (a-Si/μc-Si) tandem silicon-based solar cells. We show that during light-induced degradation the efficiency increases for illumination levels lower than standard test condition illumination. Additionally we examine the temperature coefficient of the open circuit voltage, short circuit current and fill factor. The temperature-coefficient of silicon-based thin film solar cells varies during the light-induced degradation.