Metastable Operating Stability of Perovskite/Silicon Tandem Solar Cell Modules

The performance of perovskite/silicon tandem solar cells (PTSCs) has achieved remarkable progress in recent years, showing the great potential of commercialization. Nevertheless, the operational stability of PTSC modules under real working conditions remains poorly understood. In this study, we investigated the module stability by connecting individual PTSCs. Evident hot spot effect caused by partial light occlusion was firstly observed in PTSCs. Moreover, the module exhibited a rapid output power degradation under maximum power point tracking (MPPT) condition, but it spontaneously recovers to initial output power within one minute in dark environment. Impressively, the module stability improves significantly after several MPPT cycles. These findings provide critical insights into the stability mechanisms of PTSC modules and offer practical guidelines for improving the performance in future applications.