Stable Formamidinium-Based Perovskite Solar Cells via In Situ Grain Encapsulation

Tanghao Liu, Yuanyuan Zhou^*, Zhen Li, Lin Zhang, Ming-Gang Ju, Deying Luo, Ye Yang, Mengjin Yang, Dong Hoe Kim, Wenqiang Yang, Nitin P. Padture, Matthew C. Beard, Xiao Cheng Zeng, Kai Zhu^*, Qihuang Gong, Rui Zhu^*