Highly luminescent zero-dimensional lead-free manganese halides forβ-ray scintillation  

作　　者：Linyuan Lian Wei Qi Huaiyi Ding Hao Tian Qi Ye Yong-Biao Zhao Long Zhao Jianbo Gao Daoli Zhang Jianbing Zhang 

机构地区：[1]School of Optical and Electronic Information,Huazhong University of Science and Technology,1037 Luoyu Road,Wuhan 430074,China [2]Hubei Key Laboratory of Bioinorganic Chemistry&Materia Medica,School of Chemistry and Chemical Engineering,Huazhong University of Science and Technology,Wuhan 430074,China [3]Key Laboratory of Yunnan Provincial Higher Education Institutions for Optoelectronics Device Engineering,School of Physics and Astronomy,Yunnan University,Kunming 650504,China [4]State Key Laboratory of Advanced Electromagnetic Engineering and Technology,School of Electrical and Electronic Engineering,Huazhong University of Science and Technology,Wuhan 430074,China [5]Department of Physics and Astronomy,Ultrafast Photophysics of Quantum Devices Laboratory,Clemson University,Clemson,SC 29634,USA [6]Wuhan National Laboratory for Optoelectronics,Huazhong University of Science and Technology,Wuhan 430074,China [7]Shenzhen Huazhong University of Science and Technology Research Institute,Shenzhen 518057,China

出　　处：《Nano Research》2022年第9期8486-8492,共7页纳米研究（英文版）

基　　金：the National Natural Science Foundation of China(Nos.61974052,11774239,and 61827815);the Fund from Science,Technology and Innovation Commission of Shenzhen Municipality(No.JCYJ20190809180013252);the Key Research and Development Program of Hubei Province(No.YFXM2020000188).

摘　　要：Because of their moderate penetration power,β-rays(high-energy electrons)are a useful signal for evaluating the surface contamination of nuclear radiation.However,the development ofβ-ray scintillators,which convert the absorbed high-energy electrons into visible photons,is hindered by the limitations of materials selection.Herein,we report two highly luminescent zerodimensional(0D)organic-inorganic lead-free metal halide hybrids,(C_(13)H_(30)N)_(2)MnBr_(4)and(C_(19)H_(34)N)_(2)MnBr_(4),as scintillators exhibiting efficientβ-ray scintillation.These hybrid scintillators combine the superior properties of organic and inorganic components.For example,organic components that contain light elements C,H,and N enhance the capturing efficiency ofβparticles;isolated inorganic[MnBr_(4)]2−tetrahedrons serve as highly localized emitting centers to emit intense radioluminescence(RL)underβ-ray excitation.Both hybrids show a narrow-band green emission peaked at 518 nm with photoluminescence quantum efficiencies(PLQEs)of 81.3%for(C_(13)H_(30)N)_(2)MnBr_(4)and 86.4%for(C_(19)H_(34)N)_(2)MnBr_(4),respectively.To enable the solution processing of this promising metal halide hybrid,we successfully synthesized(C_(13)H_(30)N)_(2)MnBr_(4)colloidal nanocrystals for the first time.Being excited byβ-rays,(C_(13)H_(30)N)_(2)MnBr_(4)scintillators show a linear response toβ-ray dose rate over a broad range from 400 to 2,800 Gy·s^(−1),and also display robust radiation resistance that 80%of the initial RL intensity can be maintained after an ultrahigh accumulated radiation dose of 240 kGy.This work will open up a new route for the development ofβ-ray scintillators.

关 键 词：ZERO-DIMENSIONAL metal halide hybrids radiation sterilization β-ray scintillation NANOCRYSTALS 

分 类 号：O62[理学—有机化学]