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