A Comprehensive Study of Light Soaking Effect in CdTe Solar Cells

In this work, both experiments and simulations were employed to study Cu ion's role in light soaking effect of CdTe solar cells. Both experiment and simulation show Cu ion's migration under forward-bias could cause device performance enhancement. As consistent results are achieved from both aspects, we conclude that migration of Cu ions or other charged species could be the cause of device performance enhancement observed in light soaking experiments.