Peng Cui, Dong Wei, Jun Ji, Hao Huang, Endong Jia, Shangyi Dou, Tianyue Wang, Wenjing Wang, Meicheng Li,
Planar p–n homojunction perovskite solar cells with efficiency exceeding 21.3% Nature Energy. ,vol. 4, pp. 150- 159 ,(2019) ,
10.1038/S41560-018-0324-8