Perovskite solar cells with high-efficiency exceeding 25%: a review

Metal halide perovskite solar cells (PSCs) are one of the most promising photovoltaic devices. Over time, many strategies have been adopted to improve PSC efficiency, and the certified efficiency has reached 26.1%. However, only a few research groups have fabricated PSCs with an efficiency of >25%, indicating that achieving this efficiency remains uncommon. To develop the PSC industry, outstanding talent must be reserved with the latest technologies. Herein, we summarize the recent developments in high-efficiency PSCs (>25%) and highlight their effective strategies in crystal regulation, interface passivation, and component layer structural design. Finally, we propose perspectives based on current research to further enhance the efficiency and promote the commercialization process of PSCs.