金属卤化物闪烁体薄膜的X射线成像研究进展  

Research Progress in X-ray Imaging of Metal Halide Scintillator Films

作　　者：王鲁凯 林宏健 吴坤 曹亭亭 李志远 孙炼 张磊磊 王尊刚 WANG Lukai;LIN Hongjian;WU Kun;CAO Tingting;LI Zhiyuan;SUN Lian;ZHANG Leilei;WANG Zungang(State Key Laboratory of NBC Protection for Civilian,Beijing 102205,China;Institute of Crystal Materials,Shandong University,Jinan 250100,China)

机构地区：[1]国民核生化灾害防护国家重点实验室,北京102205 [2]山东大学晶体材料研究院,山东济南250100

出　　处：《发光学报》2024年第8期1266-1280,共15页Chinese Journal of Luminescence

基　　金：国家重点实验室科研基金(SKLNBC2021-02)。

摘　　要：X射线成像在核辐射安全、无损检测、安全检查、医学诊断等领域有着广泛需求。然而,传统闪烁单晶受限于高成本耗时工艺、有限体积尺寸以及固有脆性,难以实现高效、灵活的X射线成像。相较而言,基于金属卤化物纳米晶/微晶设计的闪烁体薄膜具有简便制备、大面积尺寸、柔性变形、高效发光等显著优点,在X射线成像应用上展现出巨大潜力。本文详细综述了近几年金属卤化物闪烁体薄膜的X射线成像研究进展,首先以是否单独合成金属卤化物纳米晶/微晶为依据,将金属卤化物闪烁体薄膜制备方法概括分为两类:晶体复合成膜法、原位结晶成膜法,对比分析了两类制备方法的优缺点;其次明晰了金属卤化物晶体的发光机理,对改善闪烁体薄膜发光性能做出指导,并据此总结发光效率提升方法;再次归纳了与金属卤化物闪烁体薄膜X射线成像应用相关的各种性能,主要包括空间分辨率、柔韧性、稳定性和自修复性;最后根据研究现状对闪烁体薄膜进行总结与展望。X-ray imaging has widespread demands in the fields of nuclear radiation safety,nondestructive testing,security inspection,and medical diagnosis.However,traditional scintillation single crystals have been impeded by high cost and time-consuming process,limited size,and intrinsic brittleness,which leads to extreme difficulty in achieving efficient and flexible X-ray imaging.In contrast,scintillator films based on metal halide nanocrystals/microcrystals have significant advantages such as simple fabrication,large area,flexible deformation,and efficient luminescence,providing a huge potential for X-ray imaging applications.In this work,the X-ray imaging research progress of metal halide scintillator films has been reviewed in detail in recent years.Firstly,according to whether the metal halide nanocrystal/microcrystal is synthesized individually or not,the preparation strategies of scintillator films have been generalized into two categories:crystal composite strategy and in-situ crystallization strategy,the advantages and disadvantages of which have been further analyzed in comparison.Secondly,the luminescence mechanism of metal halide crystals has been investigated,which has been utilized to improve the luminescence performances of scintillator films,gathering the effective methods for increasing the luminescence efficiency of scintillator films.Furthermore,various performances related to X-ray imaging of metal halide scintillator films have been further summarized,mainly including spatial resolution,flexibility,stability,and self-healing.Finally,the summarization and prospect have been put forward according to the current performances of scintillator films.

关 键 词：金属卤化物晶体 闪烁体薄膜 X射线成像 辐射发光 制备方法 

分 类 号：O482.31[理学—固体物理] TL816.1[理学—物理]