Exploring centimeter-sized crystals of bismuth-iodide perovskite toward highly sensitive X-ray detection

作     者：Xin Dong Jing Liang Zhijin Xu Huajie Wu Lei Wang Shihai You Junhua Luo Lina Li Xin Dong;Jing Liang;Zhijin Xu;Huajie Wu;Lei Wang;Shihai You;Junhua Luo;Lina Li

作者机构：College of ChemistryFuzhou UniversityFuzhou 350116China State Key Laboratory of Structure ChemistryFujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China University of Chinese Academy of SciencesBeijing 100049China 

出 版 物：《Chinese Chemical Letters》 (中国化学快报（英文版）)

年 卷 期：2024年第35卷第6期

页      面：185-188页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 070302[理学-分析化学] 0703[理学-化学] 

基　　金：financially supported by the National Natural Science Foundation of China(Nos.22175177,21971238,22193042,21833010,22125110,22122507,21921001,and U21A2069) the Key Research Program of Frontier Sciences of the Chinese Academy of Sciences(No.ZDBS-LY-SLH024) The National Postdoctoral Program for Innovative Talents(No.BX2021315) the National Key Research and Development Program of China(No.2019YFA0210402) 

主　　题：Perovskite Lead-free Bismuth-based X-ray detection Sensitivity 

摘      要：Lead-halide perovskites exhibit outstanding performance in X-ray detection due to their intrinsic features such as high charge carrier mobility,large atomic number,and long carrier lifetime,but the toxicity of lead is regarded as the major factor hindering their ***,we introduce organic molecule(R)-(-)-2-methylpiperazine(R-MPz)into the bismuth-based structure to synthesize lead-free(R)-(H_(2)MPz)BiI_(5)(R-MBI).The high-quality centimeter-sized single crystals have been obtained,which show a low dark current and superior environmental ***,the single-crystal device of R-MBI exhibits a highμτproduct up to 1.88×10^(-4)cm^(2)/V and a low trap density of 1.21×10^(10)cm^(-3).Further,the detector displays excellent detection sensitivity of 263.58μC Gy_(air)^(-1)cm^(-2)and a favorable low detection limit of 4.35μGyair/s,both of which meet the requirement for medical *** findings shed light on the exploration of innovative bismuth-based hybrid perovskites for high-performance X-ray detection.