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人工晶体学报 ›› 2026, Vol. 55 ›› Issue (1): 58-67.DOI: 10.16553/j.cnki.issn1000-985x.2025.0156

• 研究论文 • 上一篇    下一篇

Cu+或Ag+共掺杂LaBr3∶Ce晶体的生长及性能研究

赵美丽1(), 宗蕾2, 王谦2, 李云云2(), 张春生1(), 吴云涛2   

  1. 1.北京玻璃研究院有限公司,北京 101111
    2.中国科学院上海硅酸盐研究所功能晶体与器件全国重点实验室,上海 201899
  • 收稿日期:2025-07-23 出版日期:2026-01-20 发布日期:2026-02-05
  • 通信作者: 李云云,张春生
  • 作者简介:赵美丽(1995—),女,河北省人,工程师。E-mail:zhaomeilizm@163.com
  • 基金资助:
    国家重点研发计划(2022YFB3503600)

Growth and Properties of Cu+ or Ag+ Co-Doped LaBr3∶Ce Crystals

ZHAO Meili1(), ZONG Lei2, WANG Qian2, LI Yunyun2(), ZHANG Chunsheng1(), WU Yuntao2   

  1. 1. Beijing Glass Research Institute Co. ,Ltd. ,Beijing 101111,China
    2. State Key Laboratory of Functional Crystals and Devices,Shanghai Institute of Ceramics,Chinese Academy of Sciences,Shanghai 201899,China
  • Received:2025-07-23 Online:2026-01-20 Published:2026-02-05
  • Contact: LI Yunyun, ZHANG Chunsheng

摘要: LaBr3:Ce晶体因高光产额、优异能量分辨率及快衰减时间等优异特性,被公认为是高性能闪烁体的代表,在核辐射探测与医学成像等领域具有重要应用前景。本文采用坩埚下降法成功制备了Cu+或Ag+共掺杂的LaBr3∶Ce晶体,并探究了不同Cu+或Ag+浓度共掺杂对LaBr3∶Ce晶体发光和闪烁性能的影响。结果表明,在光致发光和X射线激发下,Cu+或Ag+共掺杂并未改变晶体的发光机制,所有样品在325~425 nm均显示Ce3+的5d→4f特征发射。在闪烁性能方面,Cu+共掺杂晶体的光产额和能量分辨率与未掺杂样品相当,其中LaBr3∶Ce,0.2%Cu晶体的能量分辨率为2.8%@662 keV;而Ag+共掺杂则导致晶体光产额显著下降,其中LaBr3∶Ce,0.2%Ag晶体的能量分辨率劣化至4.5%@662 keV。本研究表明Cu+或Ag+共掺杂策略不能提升LaBr3∶Ce的闪烁性能,为该体系后续掺杂策略的选择提供了重要实验参考。

关键词: 闪烁晶体; LaBr3∶Ce; 共掺杂; 坩埚下降法; 光产额; 能量分辨率

Abstract: LaBr3∶Ce crystals are recognized as representative high-performance scintillators due to their outstanding properties such as high light yield, excellent energy resolution, and fast decay time, demonstrating significant application potential in fields including nuclear radiation detection and medical imaging. In this study, Cu+ or Ag+ co-doped LaBr3∶Ce crystals were successfully grown by the Bridgman method, and the effects of different Cu+ or Ag+ co-doping concentrations on their luminescence and scintillation performances of LaBr3∶Ce crystals were systematically investigated. The results show that under both photoluminescence and X-ray excitation, neither Cu+ nor Ag+ co-doping alters the luminescence mechanism of the crystals. All samples exhibit the 5d→4f characteristic emission of Ce3+ in the range of 325~425 nm. In terms of scintillation performance, the light yields and energy resolutions of Cu? co-doped crystals are comparable to those of undoped sample. Specifically, the LaBr3∶Ce,0.2%Cu crystal achieves an energy resolution of 2.8% at 662 keV. In contrast, Ag+ co-doping leads to a significant decrease in the light yield of crystal. The LaBr3∶Ce,0.2%Ag crystal exhibits an energy resolution deteriorated to 4.5% at 662 keV. These findings indicate that neither Cu+ nor Ag+ co-doping strategy improves the scintillation performance of LaBr3∶Ce, providing an important experimental guidance for the selection of future doping strategies in this system.

Key words: scintillation crystal; LaBr3∶Ce; co-doping; Bridgman method; light yield; energy resolution

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