Near-unity broadband emissive hybrid manganese bromides as highly-efficient radiation scintillators  

作　　者：Zhongliang Gong Jie Zhang Xiangyuan Deng Meng-Ping Ren Wen-Qi Wang Yu-Jiao Wang Hong Cao Li Wang Yuan-Chun He Xiao-Wu Lei 

机构地区：[1]School of Chemistry,Chemical Engineering and Materials,Jining University,Qufu,Shandong,People’s Republic of China [2]College of Chemistry and Chemical Engineering,Qufu Normal University,Qufu,Shandong,People’s Republic of China [3]Beijing Key Lab of Microstructure and Property of Advanced Materials,College of Materials Science and Engineering,Beijing University of Technology,Beijing,People’s Republic of China

出　　处：《Aggregate》2024年第5期265-273,共9页聚集体（英文）

基　　金：National Nature Science Foundation of China,Grant/Award Numbers:22171105,12004384;Shandong Provincial Natural Science Foundation,Grant/Award Numbers:ZR2020KB012,ZR2022YQ14;State Key Laboratory of Structural Chemistry,Grant/Award Number:20210015;Special Foundation of Taishan Scholar Project。

摘　　要：Zero-dimensional(0D)hybrid manganese halides have gained wide attention for the various crystal structures,excellent optical performance and scintillation properties compared with 3D lead halide perovskite nanocrystals.In this work,a new family of 0D hybrid manganese halides of A_(2)MnBr_(4)(A=BzTPP,Br-BzTPP,and F-BzTPP)based on discrete[MnBr_(4)]^(2-) tetrahedral units is reported as highly efficient lead-free scintillators.Excited by UV or blue light,these hybrids emit bright green light originating from the d–d transition of Mn^(2+) with near-unity PLQY(99.5%).Signif-icantly,high PLQY and low self-absorption render extraordinary radioluminescence properties with the highest light yield of 80,100 photons MeV-1,which reached the climax of present hybrid manganese halides and surpassed most commercial scin-tillators.The radioluminescence intensity features a linear response to X-ray doses with a detection limit of 30 nGyair s^(-1),far lower than the requirement of medical diagnostic(5.5µGyair s^(-1)).X-ray imaging demonstrates ultrahigh spatial resolution of 14.06 lp mm^(-1) and short afterglow of 0.3 ms showcasing promising application prospects in radiography.Overall,we demonstrated new hybrid manganese halides as promising scintillators for advanced applications in X-ray imaging with multi-ple superiorities of nontoxicity,facile-assembly process,high irradiation light yield,excellent resolution,and stability.

关 键 词：0D HALIDES MANGANESE SCINTILLATORS 

分 类 号：O62[理学—有机化学]