Characterization of a CH3NH3PbI3 perovskite microwire by Raman spectroscopy

• DOI: 10.1002/jrs.6286
• Publication Date: 2022-01-05T07:50:13Z
• Authors: Xiaoming Chen; Ying Xu; Zixian Wang; Ren‐Jie Wu; Horng‐Long Cheng; Hsiang‐Chen Chui
• Keywords: Crystal (programming language); Tetragonal crystal system; Characterization

Abstract We investigated the structural properties of organic–inorganic lead halide perovskite microwires through joint experimental and theoretical Raman spectroscopy. High‐quality methyl ammonium iodide (MAPBI 3 , MA = CH NH + ) with tetragonal phases explicit crystalline orientation were prepared. spectroscopy was used in studying as‐prepared determining not only crystal quality but also MAPBI aid normal mode calculations. features verified by well‐resolved peaks related to inorganic cage (IPbI stretching bending modes below 100 cm −1 ), organic cation motions (libration ~150–200 torsional ~200–250 a coupled liberation (~105–110 almost undetectable degraded signal at 95 . In micro‐Raman mapping, an intensity ratio 105 for direct imaging along microwire. The characterization posed challenge, which can be addressed using polarized technique analysis. believe that proposed method extended other perovskites different structures, such as polycrystalline films single crystals.