Xiangnan Sun, Wenda Shi, Tianjun Liu, Jinzhan Cheng, Xin Wang, Peng Xu, Wei Zhang, Xiaoming Zhao, Wanlin Guo

Science   ，2025，388（6750），957-963

Abstract: Natural illumination variations in light-dark cycles induce irreversible ion migration in perovskite solar cells, posing substantial challenges to their long-term outdoor operational stability. We addressed this issue by isolating defective octahedra at the perovskite surface using a vapor-deposited polydentate ligand. Surface octahedra isolation suppresses ion migration into the charge transport layer and reduces surface ionic defects, modulating the kinetics of ion migration during light-dark cycles. Our 785-square-centimeter industrial-scale perovskite solar modules achieved a power conversion efficiency (PCE) of 19.6%. Our modules demonstrated enhanced diurnal stability, retaining more than 97% of their initial PCE even after 101 light-dark cycles at 50°C. Our perovskite modules maintained stable power output during 45 days of outdoor operation under severe summer conditions, exhibiting stability comparable with that of the reference silicon cell.

Link: https://www.science.org/doi/abs/10.1126/science.adv4280