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人工晶体学报 ›› 2025, Vol. 54 ›› Issue (11): 1931-1936.DOI: 10.16553/j.cnki.issn1000-985x.2025.0103

• 研究论文 • 上一篇    下一篇

Eu2+掺杂Cs2BaBr4晶体的生长和闪烁性能研究

殷洁1(), 张小强2, 陈灿2, 潘建国2()   

  1. 1.湖南化工职业技术学院,湖南省无机高纯纳米粉体材料开发与应用工程技术研究中心,株洲 412000
    2.宁波大学材料科学与化学工程学院,浙江省光电探测材料及器件重点实验室,宁波 315211
  • 收稿日期:2025-05-17 出版日期:2025-11-20 发布日期:2025-12-11
  • 通信作者: 潘建国,博士,教授。E-mail:panjianguo@nbu.edu.cn
  • 作者简介:殷洁(1991—),女,湖南省人,讲师。E-mail:654611004@qq.com
  • 基金资助:
    国家自然科学基金(12375180)

Growth and Scintillation Properties of Eu2+-Doped Cs2BaBr4 Crystals

YIN Jie1(), ZHANG Xiaoqiang2, CHEN Can2, PAN Jianguo2()   

  1. 1. Hunan Research Center of Inorganic High Purity Nano Powder Materials Development and Application Engineering,Hunan Chemical Vocational Technical College,Zhuzhou 412000,China
    2. Key Laboratory of Photoelectric Detection Materials and Devices of Zhejiang Province,School of Materials Science and Chemical Engineering,Ningbo University,Ningbo 315211,China
  • Received:2025-05-17 Online:2025-11-20 Published:2025-12-11

摘要: 采用坩埚下降法成功生长出Cs2BaBr4:x% Eu2+ x=1、2、4、8)晶体。通过X射线粉末衍射和热重测试进行物相分析,结果表明晶体为一致熔融物,随着Eu2+浓度的增加,衍射峰向小角度偏移。测试了晶体的光学透射率、光致发光、X射线激发发光和衰减时间等光学和闪烁性能,并对比分析了晶体与Rb2BaBr4、LaBr3晶体的吸湿性,结果表明,不同浓度掺杂的晶体均具有良好的光学透过率,其中Cs2BaBr4:2% Eu2+晶体的光学透过率高达87.5%;在紫外光和X射线激发下,晶体在425~445 nm有尖锐发射峰;紫外激发时,不同掺杂浓度晶体的衰减时间有所不同,Eu2+掺杂浓度为1%、2%、4%和8%的Cs2BaBr4晶体所对应的衰减时间分别为2.10、1.57、2.19和2.76 μs。此外,Cs2BaBr4晶体具有较低的吸湿性。

关键词: Cs2BaBr4晶体; 闪烁晶体; 坩埚下降法; 闪烁性能; 光致发光; X射线激发发光; 衰减时间; 吸湿性

Abstract: Cs2BaBr4:x% Eu2+x=1, 2, 4, 8) crystals were successfully grown by Bridgman method. Phase analysis was performed by X-ray powder diffraction and thermogravimetric testing.The results indicate that the crystals are congruently melting compounds. As the concentration of Eu2+ increases, the diffraction peaks shift toward smaller angles. The optical and scintillation properties of the crystals were investigated by measuring the optical transmittance, photo luminescence, X-ray induced luminescence and decay time. And a comparative analysis of the hygroscopicity of the crystal with Rb2BaBr4 and LaBr3 crystals was conducted. The results reveal that crystals doped with different concentrations all exhibit good optical transmittance, and the optical transmittance of Cs2BaBr4:2% Eu2+ crystal is up to 87.5%. Under the excitation of ultraviolet light and X-rays, these crystals exhibit an emission peak in the range of 425~445 nm. Under ultraviolet excitation, the decay time of crystals with different doping concentrations is 2.10, 1.57, 2.19, and 2.76 μs, respectively. Cs2BaBr4:2% Eu2+ crystal exhibits the best scintillation performance. In addition, Cs2BaBr4 crystals exhibit low hygroscopicity.

Key words: Cs2BaBr4 crystal; scintillation crystal; Bridgman method; scintillation property; photo luminescence; X-ray induced luminescence; decay time; hygroscopicity

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