Structure design of lead-free chiral-polar perovskites for sensitive self-powered X-ray detection
作者机构：State Key Laboratory of Structural ChemistryFujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou350002China Fujian Science&Technology Innovation Laboratory for Optoelectronic Information of ChinaFuzhou350108China University of the Chinese Academy of SciencesBeijing100039China
出 版 物：《Chinese Journal of Structural Chemistry》 (结构化学（英文）)
年 卷 期：2024年第43卷第6期
页 面：34-39页
核心收录：
学科分类：1007[医学-药学(可授医学、理学学位)] 10[医学]
基 金：supported by the National Natural Science Foundation of China(22322506,22175177,22193042,22125110,22122507,21921001 and U21A2069) the Natural Science Foundation of Fujian Province(2023J06052) the Key Research Program of Frontier Sciences of the Chinese Academy of Sciences(ZDBS-LY-SLH024)
主 题：Lead-free perovskite Self-powered Chiral-polar X-ray detection
摘 要：Metal halide perovskites have made significant progress in X-ray detection owing to their exceptional optoelec-tronic ***,most of these materials suffer from toxic element lead and require for high operating ***,it is imperative to explore environmentally friendly perovskite crystals without external bias for X-ray ***,we strategically introduce chiral cations to synthesize a pair of lead-free chiral-polar hybrid perovskites(S-MPz)_(6)Bi_(3)I_(21)·6H_(2)O and(R-MPz)_(6)Bi_(3)I_(21)·6H_(2)O(1S and 1R,S/R-MPz=S/R-2-methylpipera-zinium),which exhibit strong circular dichroism(CD)signals with an anisotropic g-factor reaching approximately ***,the chiral-polar feature gives rise to distinctive spontaneous polarization,which leads to a photovoltage of 1.1 V under X-ray illumination,endowing self-powered detection capabilities for *** exploration of X-ray devices based on 1R single crystal(SC)demonstrates a high sensitivity of 5.2 pC Gy_(air)^(-1)cm^(-2)at zero *** study realizes passive X-ray detection depending on the intrinsic spontaneous polarization induced built-in electric field of chiral-polar perovskite,providing an effective approach to the chemical design of desired materials for high-performancegreenself-powered radiation detection.
维普期刊数据库