Buried Interfaces in Halide Perovskite Photovoltaics

• DOI: 10.1002/adma.202006435
• Publication Date: 2021-01-04T08:47:15Z
• Authors: Xiaoyu Yang; Deying Luo; Yuren Xiang; Lichen Zhao; Miguel Anaya; Yonglong Shen; Jiang Wu; Wenqiang Yang; Yu‐Hsien Chiang; Yongguang Tu; Rui Su; Qin Hu; Hongyu Yu; Guosheng Shao; Wei Huang; Thomas P. Russell; Qihuang Gong; Samuel D. Stranks; Wei Zhang; Rui Zhu
• Keywords: Passivation; Microscale chemistry

Abstract Understanding the fundamental properties of buried interfaces in perovskite photovoltaics is paramount importance to enhancement device efficiency and stability. Nevertheless, accessing poses a sizeable challenge because their non‐exposed feature. Herein, mystery interface full stacks deciphered by combining advanced situ spectroscopy techniques with facile lift‐off strategy. By establishing microstructure–property relations, basic losses at contact are systematically presented, it found that induced both sub‐microscale extended imperfections lead‐halide inhomogeneities major roadblocks toward improvement performance. The can be considerably mitigated use passivation‐molecule‐assisted microstructural reconstruction, which unlocks potential for improving findings open new avenue understanding performance thus design passivation strategies remove top surfaces photovoltaics, resulting substantial