Sc3+和Y3+共掺杂对LaBr3:Ce单晶发光和闪烁性能的影响

IF 1.7 4区材料科学 Q3 CRYSTALLOGRAPHY

Journal of Crystal Growth Pub Date : 2025-04-25 DOI:10.1016/j.jcrysgro.2025.128207

Lei Zong , Qian Wang , Yuhao Zhang , Lixi Wang , Yuntao Wu

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引用次数: 0

摘要

本文系统地研究了Sc和Y共掺杂对LaBr3:Ce单晶发光和闪烁性能的影响。采用垂直Bridgman法制备了不同Sc和Y浓度共掺杂的直径为7 mm的LaBr3:Ce单晶。发现Sc共掺杂不会改变发光机制，对产光率和能量分辨率的影响有限。而引入Y共掺杂后，LaBr3:Ce单晶呈现显色。除了Ce3+ 5d-4f发射外，Y共掺杂的LaBr3:Ce在光致发光和x射线激发下都具有450 ~ 800 nm的缺陷相关发射。此外，Y共掺杂引入了260 ns的慢闪烁衰减分量和增强的x射线余辉水平。Y共掺杂后，LaBr3:Ce的光产率和能量分辨率均明显下降。

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Effects of Sc3+ and Y3+ codoping on luminescence and scintillation properties of LaBr3:Ce single crystals

In this work, the effects of Sc and Y codoping on the luminescence and scintillation properties of LaBr₃:Ce single crystals were systematically studied. LaBr₃:Ce single crystals with a diameter of 7 mm codoped with different Sc and Y concentrations were grown by the vertical Bridgman method. It was found the incorporation of Sc codoping does not alter the luminescence mechanism and exhibits limited effects on light yield and energy resolution. In contrast, with the introduction of Y codopant, the LaBr₃:Ce single crystals exhibit coloration. In addition to the feature Ce³⁺ 5d-4f emission, Y codoped LaBr₃:Ce has a defect-related emission ranging from 450 nm to 800 nm under both photoluminescence and X-ray excitation. Moreover, Y codoping introduces a slow scintillation decay component of 260 ns and an enhanced X-ray afterglow level. Both light yield and energy resolution of LaBr₃:Ce were significantly deteriorated after Y codoping.

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来源期刊

Journal of Crystal Growth 化学-晶体学

CiteScore

3.60

自引率

11.10%

发文量

373

审稿时长

65 days

期刊介绍： The journal offers a common reference and publication source for workers engaged in research on the experimental and theoretical aspects of crystal growth and its applications, e.g. in devices. Experimental and theoretical contributions are published in the following fields: theory of nucleation and growth, molecular kinetics and transport phenomena, crystallization in viscous media such as polymers and glasses; crystal growth of metals, minerals, semiconductors, superconductors, magnetics, inorganic, organic and biological substances in bulk or as thin films; molecular beam epitaxy, chemical vapor deposition, growth of III-V and II-VI and other semiconductors; characterization of single crystals by physical and chemical methods; apparatus, instrumentation and techniques for crystal growth, and purification methods; multilayer heterostructures and their characterisation with an emphasis on crystal growth and epitaxial aspects of electronic materials. A special feature of the journal is the periodic inclusion of proceedings of symposia and conferences on relevant aspects of crystal growth.