Oleylamine‐Formamidinium Coherent Structure Boosts the Synergistic Enhancement of Efficiency and Stability in Perovskite Solar Cells
Xuewei Jiao·Weiguang Kong·Song Yin·Jiawei Lu·Xudong Liu·Bingshun Xu·Haibin Chen·Li Guan·Zhaoyi Jiang·Shaopeng Yang·Fei Yan
ABSTRACT Interface optimization is an indispensable key step for planar high‐efficiency and stable perovskite solar cells (PSCs). However, existing interface optimization strategies mostly focus on defect passivation or energy level alignment on the upper surface of perovskite, making it difficult to construct a dense and stable protective layer on the perovskite surface to effectively resist structural degradation caused by moisture intrusion and ion migration. In this study, the perovskite sur