Efficient and photostable CsPbI2Br solar cells realized by adding PMMA. (May 2021) - Shang, Yanbo; Fang, Zhimin; Hu, Wanpei; Zuo, Chuantian; Li, Bairu; Li, Xingcheng; Wang, Mingtai; Ding, Liming; Yang, Shangfeng