Polystyrene passivation enables 24% efficient and stable perovskite solar cells

Researchers at Korea's Kyung Hee University, Korea Institute of Industrial Technology (KITECH) and Chung-Ang University have developed a polystyrene (PS)-based defect passivation strategy that targets grain boundaries and buried interfaces in perovskite solar cells, achieving a power conversion efficiency (PCE) of 24% alongside significantly improved operational stability. This work targets defect-induced trap states, which are concentrated primarily at grain boundaries and interfaces in polycry