Keyou Yan1 2 Jian-Bin Xu1 Jiangsheng Xie1 Mingzhu Long1

1, The Chinese University of Hong Kong, Shatin, , Hong Kong
2, South China University of Technology, Guang Zhou, , China

The stability issue is a big challenge in perovskite solar cell. We study the degradation of perovskite and perform coordination enginnering to enhance the stability. The intermediate compounds of degradation and formation are identified and new reaction routes are developed. Large gain and high performance perovskite solar cell with efficiency above 20% are achieved. Through the interface passivation, the optoelectronic and stability are greatly enhanced, aiming to promote the commercialization step.