A hybrid organic-inorganic perovskite with robust SHG switching  

作　　者：Mengjuan Yang Hao Cheng Yuqiu Xu Mengzhen Li Yong Ai 

机构地区：[1]Ordered Matter Science Research Center,Nanchang University,Nanchang 330031,China

出　　处：《Chinese Chemical Letters》2022年第4期2143-2146,共4页中国化学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China (No. 21901099)。

摘　　要：Owing to the diversity of structure and potential applications in the field of electrics,sensors,and light-emitting diodes,lead halide perovskites have attracted great attention in recent years.Especially those lead halide perovskites with non-centrosymmetric crystal structures usually exhibit nonlinear optical(NLO) characteristics,which may endow them photoelectricity switching functionality.In this work,a lead-based hybrid organic-inorganic perovskite(HOIP) material,trimethyliodomethylammonium lead trichloride(TMIM·PbCl_(3)),is obtained on the basis of tetramethylammonium lead chloride through halogen substitution on the cation part.It shows dual-phase-transition behavior around 345 and 358 K, which is significantly improved.TMIM·PbCl_(3)crystallizes in the chiral space group,P2_(1)2_(1)2_(1), and shows a welldefined second harmonic generation(SHG) response,and good switching endurance,which makes it an excellent candidate for SHG switching material.This work highlights the importance of halogen substitution for crystal engineering and may pave way for the further exploration of the optoelectronic devices.

关 键 词：Lead hybrid perovskite Second harmonic generation Single-crystal X-ray diffraction Nonlinear optical switching Halogen substitution 

分 类 号：TB30[一般工业技术—材料科学与工程]