Alleviating hysteresis and improving device stability of perovskite solar cells via alternate voltage sweeps
Xia Chao1, Song Wei-Dong1, Zhang Chong-Zhen1, Yuan Song-Yang1, Hu Wen-Xiao1, Qin Ping1, Wang Ru-Peng1, Zhao Liang-Liang1, Wang Xing-Fu1, He Miao1, Li Shu-Ti1, 2, †
       

(color online) (a) Schematic image of the device structure of the perovskite solar cell. (b) Current–voltage curves under forward and reverse scans, respectively.