高性能工业级的 CsPbBrBr 是一个高性能工业级的 CsPbBr
Qihao Sun1, Bangzhi Ge1, Bao Xiao1
1State Key Laboratory of Solidification Processing & Key Laboratory of Radiation Detection Materials and Devices, MIIT, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an, 710072, China.
概括
大型化 (CsPbBr3) 晶体通过优化晶体生长来实现室温马射线检测的高性能. 这一突破使得实用应用的成本效益高,高效的马射线探测器成为可能.
科学领域:
- 材料科学 材料科学 材料科学
- 固态物理 固态物理
- 核仪器仪表 核仪器仪表 核仪器仪表
背景情况:
- 全无机金属化物罗夫斯基特CsPbBr3晶体对室温马射线检测具有前景.
- 现有的大型CsPbBr3晶体的检测效率较低,原因是二次相内含物捕获电荷载体.
研究的目的:
- 设计CsPbBr3的晶体生长,以克服大晶体性能方面的局限性.
- 为了获得高质量,大直径的CsPbBr3晶体,适合于实际的马射线检测.
主要方法:
- 通过控制温度梯度和生长速度,优化了晶体生长过程中的固体-液体接口.
- 在晶体结构中最小化了二次相的形成.
- 制造的工业级CsPbBr3晶体,直径为30毫米.
主要成果:
- 在大型CsPbBr3晶体中实现了35.4cm2V-1s-1的高载体流动性.
- 证明了卓越的马射线检测性能,在662 keV的137Cs峰值下以9.91%的能量分辨率解决.
- 获得了迄今为止大型CsPbBr3晶体报告的最高性能指标.
结论:
- 工程结晶生长成功地抑制了大型CsPbBr3晶体的二次相形成.
- 开发出的大型CsPbBr3晶体表现出卓越的载体移动性和玛射线检测分辨率.
- 这一进步为具有成本效益的,可部署的室温马射线探测器铺平了道路.
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