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

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

doi:10.1038/s41377-024-01532-z

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

Original Articles

- Exciton-harvesting enabled efficient charged particle detection in zero-dimensional halides
- Light: Science & Applications Vol. 13, Issue 9, Pages: 1944-1955(2024)
- Affiliations：
  
  1.Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 201899, China
  2.Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
  3.National Engineering Research Center for Rare Earth, Grirem Advanced Materials Co., Ltd. and General Research Institute for Nonferrous Metals, Beijing 100088, China
  4.Department of Physics, Beihang University, Beijing 100191, China
  5.Spallation Neutron Source Science Center, Dongguan 523803, China
  6.Department of Optical Materials, Institute of Physics of the Czech Academy of Sciences, Prague 16200, Czech Republic
  7.Northwest Institute of Nuclear Technology, Xi'an 710024, China
- Author bio：
  
  Xilei Sun (sunxl@ihep.ac.cn)
  Xiaoping OuYang (oyxp2003@aliyun.com)
  Yuntao Wu (ytwu@mail.sic.ac.cn)
- Funds：
- DOI：10.1038/s41377-024-01532-z
  CLC：
- Received：10 February 2024，
  
  Revised：24 June 2024，
  
  Accepted：2024-07-15，
  
  Published Online：14 August 2024，
  
  Published：30 September 2024
- Accepted：
Scan QR Code
Wang, Q. et al. Exciton-harvesting enabled efficient charged particle detection in zero-dimensional halides. Light: Science & Applications, 13, 1944-1955 (2024).
DOI：

Wang, Q. et al. Exciton-harvesting enabled efficient charged particle detection in zero-dimensional halides. Light: Science & Applications, 13, 1944-1955 (2024). DOI： 10.1038/s41377-024-01532-z.

摘要

Abstract

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) Cs

: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 Cs

:Tl single crystals

outperforming the commercial ZnS:Ag/PVT composites for charged particle detection applications. Furthermore

a radiation detector prototype based on Cs

:Tl single crystal demonstrates th

e capability of identifying radioactive

220

Rn gas for environmental radiation monitoring applications. We believe that the exciton-harvesting strategy proposed here can greatly boost the applications of LDHs materials.

关键词

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references

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