基于金属卤化钙钛矿的X射线探测与成像-中国材料进展

文章信息/Info

Author(s):: WU Rong; LIU Fangze; BAO Yuchun; LI Hongbo; (School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, China)

Keywords:: X-ray; detectors; metal halide perovskites; radiation; imaging; sensitivity

摘要:: X射线探测技术广泛应用于医疗诊断、安检和质量检测等无损探测领域。金属卤化钙钛矿因具备易于制备、低缺陷密度、高电阻率和高载流子迁移率-寿命乘积等性质而成为理想的X射线吸收材料。首先从X射线与半导体吸收材料相互作用的物理机制、探测器结构和评价指标出发，分析了金属卤化钙钛矿作为X射线探测吸收材料的优势，进一步介绍了面向X射线探测的金属卤化钙钛矿的合成方法。总结了近年来基于金属卤化钙钛矿的X射线探测的重要研究进展，并围绕如何提升灵敏度和检测限开展了系统的讨论。同时，还介绍了X射线探测器与读出电路的集成方式和近年来X射线成像的研究进展。最后，展望了基于金属卤化钙钛矿的X射线探测与成像未来发展面临的挑战和方向。

Abstract:: X-ray detection technology is a widely used technology in non-destructive inspections, including medical diagnosis, safety inspection and quality inspection. Metal halide perovskites are ideal X-ray absorption materials because of their easy preparation, low defect density, high resistivity and high carrier mobility-lifetime product. Starting from the fundamental interactions between X-ray and absorption material, detector structure and evaluation metrics, this review analyses the advantages of metal halide perovskites as X-ray absorption material and further introduces the synthesis methods of metal halide perovskites. Next, this review summarizes the recent progress of X-ray detectors based on metal halide perovskites in recent years, and systematically discusses how to improve the sensitivity and detection limit. The integration methods of X-ray detector and read out circuit, and the research progress of X-ray imaging detectors in recent years are also overviewed. Finally, the challenges and outlooks of X-ray detection and imaging based on metal halide perovskites are proposed.