2025年3月27日,陕西师范大学“天工”学术报告在致知楼2118学术报告厅举行。中国科学院深圳先进技术研究院李云龙副研究员应邀作学术报告。报告会由赵奎教授主持,学院教师及相关专业研究生参加了此次报告。
李云龙副研究员的报告以“直接型X射线探测器离子迁移调控研究”为题。金属卤化物钙钛矿(MIHPs)因其优异的X射线表减系数、高载流子迁移率-寿命(IT)积、卓越的成像检测效率以及可溶液加工的可扩展性,在X射线探测领域受到了广泛关注。这些特性使MIHPS成为新一代高性能辐射探测半导体材料的有力竞争者。然而,MHPs内部不可控的离子迁移会导致器件响应的不稳定性和可靠性受限,严重制约其在成像应用中的实际应用,尤其是在三维钙钛矿体系中。本报告将探讨离子迁移导致非线性响应行为的根本机制之一,并讨论针对该问题的先进解决策略。具体而言,将重点介绍异质结设计、分子工程、维度调控及复合材料创新等方法,以实现高性能、稳定的直接转换X射线探测器,推动其实用化进程。
报告会后,李云龙副研究员与老师、同学就目前钙钛矿X射线探测器所面临的难题以及离子迁移导致非线性响应行为的根本机制进行了深入的学术交流和讨论,在场师生都受益匪浅,报告会在热烈的掌声中圆满结束。
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