材料科学
钙钛矿(结构)
溴化铵
卤化物
卤素
光电子学
化学工程
半导体
烷基
无机化学
肺表面活性物质
有机化学
工程类
化学
作者
Congcong Zhang,Shuai Yuan,Yanhui Lou,Qingwei Liu,Meng Li,Hiroyuki Okada,Zhao-Kui Wang
标识
DOI:10.1002/adma.202001479
摘要
Abstract Interface strains and lattice distortion are inevitable issues during perovskite crystallization. Silane as a coupling agent is a popular connector to enhance the compatibility between inorganic and organic materials in semiconductor devices. Herein, a protonated amine silane coupling agent (PASCA‐Br) interlayer between TiO 2 and perovskite layers is adopted to directionally grasp both of them by forming the structural component of a lattice unit. The pillowy alkyl ammonium bromide terminals at the upper side of the interlayer provide well‐matched growth sites for the perovskite, leading to mitigated interface strain and ensuing lattice distortion; meanwhile, its superior chemical compatibility presents an ideal effect on healing the under‐coordinated Pb atoms and halogen vacancies of bare perovskite crystals. The PASCA‐Br interlayer also serves as a mechanical buffer layer, inducing less cracked perovskite film when bending. The developed molecular‐level flexible interlayer provides a promising interfacial engineering for perovskite solar cells and their flexible application.
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