Introducing Ferroelasticity into 1D Hybrid Lead Halide Semiconductor by Halogen Substitution Strategy

作者：Meng‐Meng Lun, Chang‐Yuan Su, Jie Li, Qiang‐Qiang Jia, Hai‐Feng Lu, Da‐Wei Fu, Yi Zhang, Zhi‐Xu Zhang · 发表于：Small · 年份：2023 · DOI：10.1002/smll.202303127 · 被引用次数：37 · 研究领域：Perovskite Materials and Applications、Solid-state spectroscopy and crystallography、Photorefractive and Nonlinear Optics

Abstract Organic–inorganic hybrid lead halide perovskites (OLHPs), represented by (CH 3 NH 3 )PbI 3 , are one of the research focus due to their exceptional performance in optoelectronic applications, and ferroelastic domain walls are benign to their charge carrier transport that is confirmed recently. Among them, the 1D OLHPs feature better stability against desorption and moisture, but related 1D ones possessing ferroelasticity are rarely investigated and reported so far. In this work, the 1D ferroelastic semiconductor ( N ‐iodomethyl‐ N ‐methyl‐morpholinium)PbI 3 ((IDMML)PbI 3 ) is prepared successfully by introducing successively halogenate atoms from Cl, Br to I into the organic cation of the prototype ( N,N ‐dimethylmorpholinium)PbI 3 ((DMML)PbI 3 ). Notably, (IDMML)PbI 3 shows the narrow bandgap energy (≈2.34 eV) according to the ultraviolet‐visible absorption spectrum and the theoretical calculation, and possesses the evident photoconductive characteristic with the on/off ratio of current of ≈50 under the 405 nm light irradiation. This work provides a new case for the ferroelastic OLHPs and will inspire intriguing research in the field of optoelectronic.