首页|Exciton-harvesting enabled efficient charged particle detection in zero-dimensional halides

Exciton-harvesting enabled efficient charged particle detection in zero-dimensional halides

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  • 国家科技期刊平台
  • NETL
  • NSTL
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Materials for radiation detection are critically important and urgently demanded in diverse fields,starting from fundamental scientific research to medical diagnostics,homeland security,and environmental monitoring.Low-dimensional halides(LDHs)exhibiting efficient self-trapped exciton(STE)emission with high photoluminescence quantum yield(PLQY)have recently shown a great potential as scintillators.However,an overlooked issue of exciton-exciton interaction in LDHs under ionizing radiation hinders the broadening of its radiation detection applications.Here,we demonstrate an exceptional enhancement of exciton-harvesting efficiency in zero-dimensional(0D)Cs3Cu2I5∶Tl halide single crystals by forming strongly localized Tl-bound excitons.Because of the suppression of non-radiative exciton-exciton interaction,an excellent α/β pulse-shape-discrimination(PSD)figure-of-merit(FoM)factor of 2.64,a superior rejection ratio of 10-9,and a high scintillation yield of 26 000 photons MeV-1 under 5.49 MeV α-ray are achieved in Cs3Cu2I5∶Tl single crystals,outperforming the commercial ZnS:Ag/PVT composites for charged particle detection applications.Furthermore,a radiation detector prototype based on Cs3Cu2I5:Tl single crystal demonstrates the capability of identifying radioactive 220Rn gas for environmental radiation monitoring applications.We believe that the exciton-harvesting strategy proposed here can greatly boost the applications of LDHs materials.

Qian Wang、Chenger Wang、Hongliang Shi、Jie Chen、Junye Yang、Alena Beitlerova、Romana Kucerkova、Zhengyang Zhou、Yunyun Li、Martin Nikl、Xilei Sun、Xiaoping OuYang、Yuntao Wu

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Shanghai Institute of Ceramics,Chinese Academy of Sciences,Shanghai 201899,China

Institute of High Energy Physics,Chinese Academy of Sciences,Beijing 100049,China

National Engineering Research Center for Rare Earth,Grirem Advanced Materials Co.,Ltd.and General Research Institute for Nonferrous Metals,Beijing 100088,China

Department of Physics,Beihang University,Beijing 100191,China

Spallation Neutron Source Science Center,Dongguan 523803,China

Department of Optical Materials,Institute of Physics of the Czech Academy of Sciences,Prague 16200,Czech Republic

Northwest Institute of Nuclear Technology,Xi'an 710024,China

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National Key R&D Program of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaShanghai Municipal Natural Science FoundationShanghai Municipal Natural Science FoundationCAS Cooperative Research ProjectCAS Project for Young Scientist in Basic ResearchOP Research,Development,and Education financed by European Structural and Investment Funds,(Czech MEYS project)

2022YFB350360011975303122115305611230521120ZR147390021TS1400100121631KYSB20210017YSBR-024SOLID21 CZ.02.1.01/0.0/0.0/16_019/0000760

2024

10.1038/s41377-024-01532-z

光:科学与应用(英文版)
中国科学院长春光学精密机械与物理研究所

光:科学与应用(英文版)

CSTPCD
ISSN：2095-5545
年,卷(期)：2024.13(9)
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