零维钙钛矿结构Cs_(3)Cu_(2)Br_(5)单晶的生长和X射线探测性能  

Crystal Growth and X-Ray Detection Performance of 0D Cs_(3)Cu_(2)Br_(5) Single Crystal Perovskite

作　　者：王谦 王京康 成双良 任国浩[2] 朱兴文[1] 吴云涛 WANG Qian;WANG Jingkang;CHENG Shuangliang;REN Guohao;ZHU Xingwen;WU Yuntao(School of Materials Science and Engineering, Shanghai University, Shanghai 200444, China;Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China;School of Materials Science and Engineering, University of Shanghai for Science and Technology, Shanghai 200082, China)

机构地区：[1]上海大学材料科学与工程学院,上海200444 [2]中国科学院上海硅酸盐研究所,上海200050 [3]上海理工大学材料科学与工程学院,上海200082

出　　处：《人工晶体学报》2021年第10期1919-1924,共6页Journal of Synthetic Crystals

基　　金：国家自然科学基金(11975303);上海市自然科学基金(20ZR1473900);上海市高新技术领域项目(20511107400)。

摘　　要：金属卤化物低维钙钛矿具有高效的发光性能,并且作为闪烁体在辐射探测领域表现出极大的潜力。本文采用布里奇曼坩埚下降法生长出全无机零维钙钛矿结构Cs_(3)Cu_(2)Br_(5)单晶。研究了Cs_(3)Cu_(2)Br_(5)的光学吸收、光致激发和发射,时间分辨光致发光和以及X射线探测性能。Cs_(3)Cu_(2)Br_(5)晶体结构为正交晶系,空间群为Pnma。在X射线激发下,Cs_(3)Cu_(2)Br_(5)晶体具有峰值约为467 nm的宽带发射,该发射来自自陷激子发射。Cs_(3)Cu_(2)Br_(5)的稳态光产额约为4000 ph./MeV,且X射线余辉性能表现与BGO晶体相当。Metal halides low-dimensional perovskites have highly efficient luminescent properties and shown great potential as scintillators for radiation detection applications.Herein,single crystal of all-inorganic zero-dimensional Cs_(3)Cu_(2)Br_(5)was grown by the Bridgman technique.The optical absorption,photoluminescence emission and excitation,time-resolved photoluminescence,and X-ray detection performance of Cs_(3)Cu_(2)Br_(5)were measured.The Cs_(3)Cu_(2)Br_(5)crystallized into orthorhombic system with a space group of Pnma.Under the excitation of X-ray,Cs_(3)Cu_(2)Br_(5)crystal has a broad emission peaking at about 467 nm originated from self-trapped exciton emission.The steady state light yield of Cs_(3)Cu_(2)Br_(5)is about 4000 ph./MeV and its afterglow performance is comparable to that of BGO crystal.

关 键 词：零维钙钛矿 闪烁体 Cs_(3)Cu_(2)Br_(5)单晶 坩埚下降法 X射线探测 自陷激子 

分 类 号：O73[理学—晶体学]