Photonics Research, Volume. 9, Issue 3, 351(2021)

Solution-processed lead-free bulk 0D Cs3Cu2I5 single crystal for indirect gamma-ray spectroscopy application

Qiang Xu1、*, Juan Wang1, Qindong Zhang1, Xiao Ouyang2,3, Maheng Ye1, Weiting Xie4, Xuewen Yan4, Deyuan Li4, Xiaoping Ouyang2,3,5, Xiaobing Tang1, and Xiaodong Zhang4
Author Affiliations
  • 1Department of Nuclear Science and Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China
  • 2Shaanxi Engineering Research Center of Controllable Neutron Source, School of Science, Xijing University, Xi’an 710123, China
  • 3Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China
  • 4China Institute for Radiation Protection, Taiyuan 030012, China
  • 5Northwest Institute of Nuclear Technology, Xi’an 710024, China
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    Figures & Tables(5)
    (a) Powder XRD pattern of Cs3Cu2I5. (b) Crystal structure of NaI and Cs3Cu2I5. (c) XPS survey spectrum of Cs3Cu2I5 SC. (d)–(f) High-resolution XPS spectra of Cu 2p, I 3d, and Cs 3d, respectively.
    Optical properties. (a) Optical absorption spectra and PL spectra of Cs3Cu2I5 single crystal. Inset: photograph of crystal irradiated by 266 nm UV light. (b) Time-resolved PL decay of Cs3Cu2I5 single crystal (310 nm laser excitation). (c) PL spectra excited with various power densities of 266 nm UV light. (d) Normalized temperature-dependent PL spectrum from 77 to 300 K. (e) Integrated PL intensity as a function of excited power density (266 nm). (f) FWHM of PL versus temperature from 85 to 295 K.
    (a) Theoretical calculated absorption spectra of Cs3Cu2I5, CsI, LaBr3, and NaI versus photon energy from 1 keV to 10 MeV. (b) X-ray excited luminescence (XEL) spectra of Cs3Cu2I5 as a function of X-ray dose rate. The excited X-ray uses X-ray tube with Ag target, operated at 45 kV. (c) XEL decay profile of Cs3Cu2I5. (d) Schematic diagram of a band model scintillation mechanism of Cs3Cu2I5. VB, valence band; CB, conduction band; STEB, self-trapped exciton (STE) band.
    (a) Pulse height spectra of 662 keV gamma-ray from C137s radiation source. (b) Relative light yield as a function of gamma-ray energy.
    (a) XEL spectra of Cs3Cu2I5 crystal after irradiation with different doses of gamma rays from C60o. (b) Relative output of bulk Cs3Cu2I5 crystal stored in air at room temperature for 30 days.
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    Qiang Xu, Juan Wang, Qindong Zhang, Xiao Ouyang, Maheng Ye, Weiting Xie, Xuewen Yan, Deyuan Li, Xiaoping Ouyang, Xiaobing Tang, Xiaodong Zhang, "Solution-processed lead-free bulk 0D Cs3Cu2I5 single crystal for indirect gamma-ray spectroscopy application," Photonics Res. 9, 351 (2021)

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    Paper Information

    Category: Optical and Photonic Materials

    Received: Oct. 21, 2020

    Accepted: Jan. 8, 2021

    Published Online: Feb. 24, 2021

    The Author Email: Qiang Xu (xuqiangxmu@hotmail.com)

    DOI:10.1364/PRJ.412959

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