Combining Efficiency and Stability in Mixed Tin–Lead Perovskite Solar Cells by Capping Grains with an Ultrathin 2D Layer

Mingyang Wei, Ke Xiao, Grant Walters, Renxing Lin, Yongbiao Zhao, Makhsud I. Saidaminov, Petar Todorović, Andrew Johnston, Ziru Huang, Haijie Chen, Aidong Li, Jia Zhu, Zhenyu Yang, Ya-Kun Wang, Andrew H. Proppe, Shana O. Kelley, Yi Hou, Oleksandr Voznyy, Hairen Tan, E. Sargent