多量子阱二维钙钛矿的快中子闪烁

中文摘要 AI 辅助

快中子闪烁体必须高效地将中子能量转换为可探测的光，同时能够在中子与γ射线背景之间实现选择性。在此，我们报告了一种层状二维（2D）卤化铅钙钛矿闪烁体的合成策略，该策略能够独立控制宏观探测器几何形状和微观相组成。我们的合成方法可生产毫米厚、大面积闪烁体，其具有精心设计的多量子阱能级景观，在保持纳秒级发射动力学的同时实现了有效的谱分离。我们的闪烁体在137Cs辐照下，于662 keV处表现出5.4%的能量分辨率。在氘-氘聚变中子辐照下，我们通过脉冲形状甄别直接展示了中子与γ射线事件的分离，品质因子为3.51。综合来看，这些结果确立了多量子阱二维钙钛矿作为一种可扩展的材料平台，该平台在可控的探测器形状因子内兼具快中子灵敏度和选择性。

英文摘要

Fast-neutron scintillators must efficiently convert neutron energy into detectable light while enabling selectivity between neutrons and the γ-ray background. Here, we report a synthesis strategy for layered two-dimensional (2D) lead halide perovskite scintillators with independent control of the macroscopic detector geometry and microscopic phase composition. Our synthesis approach produces mm-thick, large-area scintillators with a deliberately engineered multi-quantum-well energy landscape, creating an effective spectral separation while retaining nanosecond emission dynamics. Our scintillators exhibit an energy resolution of 5.4% at 662 keV under 137Cs irradiation. Under deuterium-deuterium fusion neutron irradiation, we directly demonstrate neutron and γ-ray event separation by pulse shape discrimination, with a figure of merit of 3.51. Taken together, these results establish multi-quantum-well 2D perovskites as a scalable materials platform that combines fast-neutron sensitivity and selectivity within a controllable detector form factor.

发表机构

• Massachusetts Institute of Technology（麻省理工学院）
• Seoul National University（首尔大学）
• Università degli Studi Milano - Bicocca（米兰比可卡大学）
• SN Display Co. Ltd.（SN显示有限公司）

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