Bond Polarizability as a Probe of Local Crystal Fields in Hybrid Lead-Halide Perovskites

• DOI: 10.1021/acs.jpclett.3c01158
• Publication Date: 2023-07-05T14:56:04Z
• Authors: Yujing Wei; Artem G. Volosniev; Dusan Lorenc; Ayan A. Zhumekenov; Osman M. Bakr; Mikhail Lemeshko; Zhanybek Alpichshev
• Keywords: Crystal (programming language)

A rotating organic cation and a dynamically disordered soft inorganic cage are the hallmark features of organic-inorganic lead-halide perovskites. Understanding interplay between these two subsystems is challenging problem, but it this coupling that widely conjectured to be responsible for unique behavior photocarriers in materials. In work, we use fact polarizability strongly depends on ambient electrostatic environment put molecule forward as sensitive probe local crystal fields inside lattice cell. We measure average C/N-H bond stretching mode by means infrared spectroscopy, which allows us deduce character motion molecule, find magnitude field, place an estimate strength hydrogen halide atoms. Our results pave way understanding electric perovskites using spectroscopy.