Stabilizing black-phase formamidinium perovskite formation at room temperature and high humidity

Wei Hui, Lingfeng Chao, Hui Lu, Fei Xia, Qi Wei, Zhenhuang Su, Tingting Niu, Lei Tao, Bin Du, Deli Li, Yue Wang, He Dong, Shouwei Zuo, Bixin Li, Wei Shi, Xueqin Ran, Ping Li, Hui Zhang, Zhongbin Wu, Chenxin RanLin Song, Guichuan Xing, Xingyu Gao, Jing Zhang, Yingdong Xia, Yonghua Chen, Wei Huang