Effect of Edaravone (An Antioxidant) on the Performance of Organic Perovskite Solar Cells

Perovskite solar cells (PSCs) have broad application prospects in the field of renewable energy. The photovoltaic performance and long‐term stability of PSCs are important factors for the industrialization of PSCs. Passivation of perovskite films by antioxidants is an effective approach to not only reduce the density of defect states but also improve the environmental stability of the device. Herein, edaravone (EDA) is added to the perovskite precursor solution to passivate the defects and also scavenge ultraviolet(UV)‐induced free radicals during photoaging. The EDA‐optimized device achieves a champion power conversion efficiency (PCE) of 20.81%, and after 1000 h of exposure to the environment, the efficiency can maintain 72% of the original value.