题目：

Perovskite Films with Reduced Interfacial Strains via a Molecular-Level Flexible Interlayer for Photovoltiac Application

作者：

Cong-Cong Zhang,^1,3 Shuai Yuan,¹ Yan-Hui Lou,² Qing-Wei Liu,¹ MengLi,¹ Hiroyuki Okada³ and Zhao-Kui Wang^1,*

单位：

¹Institute of Functional Nano and Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University, Suzhou, China.

²School of Energy, Soochow Institute for Energy and Materials Innovations and Key Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu Province, Soochow University, Suzhou, 215006, China.

³Graduate School of Science and Engineering University of Toyama, Toyama 930-8555, Japan

摘要：

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 TiO₂ 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 undercoordinated 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.

影响因子：

25.809

分区情况：

一区

链接：

https://onlinelibrary.wiley.com/doi/10.1002/adma.202001479