低降解的高灵敏性X射线探测器,基于化化矿矿单晶
Lishan Liu1, Mingxia Xu1, Xinguang Xu1
1State Key Laboratory of Crystal Materials, Shandong University, Jinan, Shandong, 250100, China.
Advanced materials (Deerfield Beach, Fla.)
|September 16, 2024
概括
甲基化单晶 (MAPbI3 SC) 的化增强了X射线探测器的稳定性和性能. 这一策略提高了先进的X射线检测系统的灵敏度和检测极限.
科学领域:
- 材料科学 材料科学 材料科学
- 固态物理 固态物理
- 探测器技术 探测器技术
背景情况:
- 甲基氧化单晶 (MAPbI3 SC) 由于其光电子特性和低成本,对X射线检测具有前景.
- 由离子迁移引起的不稳定性,暗流漂移和歇斯底里限制了MAPbI3 SC探测器的应用.
研究的目的:
- 研究将纳入MAPbI3 SC对X射线探测器性能的影响.
- 为了提高基于矿的X射线探测器的稳定性和灵敏度.
主要方法:
- 一系列化甲基酸单晶 (DxMAPbI3) X射线探测器的制造,其含量各不相同 (x = 0, 0.15, 0.75, 0.99).
- 离子迁移,电阻,灵敏度和检测极限的表征.
- 分析键 (N-D···I) 和离子激活能量.
主要成果:
- 化显著增加了离子激活能量,达到886 meV,这是由于更强的N-D··I键.
- D0.99MAPbI3 SC探测器的性能提高了五倍以上.
- 实现了5.39 × 10^-2 cm^2 V^-1的记录移动寿命 (μτ) 乘积,对于120 keV的X射线具有超高灵敏度 (2.18 × 10^6 μC Gy^-1 cm^-2),以及低检测极限 (4.8 nGy_air s^-1).
结论:
- 控制有机中的含量提供了一种调整探测器灵敏度,离子迁移和电阻率的方法.
- 化有效抑制离子迁移,从而提高探测器的稳定性和性能.
- 这种简单的策略使得使用矿SCs的超敏感X射线检测和成像系统的开发成为可能.
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