自动驱动的矿光子计数探测器
Ying Zhou1, Chengbin Fei1, Md Aslam Uddin1
1Department of Applied Physical Sciences, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA.
Nature
|April 5, 2023
概括
金属化物矿 (MHP) 允许自动供电的光子计数探测器与光倍增器竞争. 优化浅层陷提高了性能,降低了敏感弱光检测的暗数率.
科学领域:
- 材料科学
- 凝聚物质物理学
- 光子学
背景情况:
- 金属化物矿 (MHP) 是用于太阳能电池和LED等光电子设备的已知材料,通常在强光条件下使用.
- 目前的光子计数技术,如光倍增器 (SiPM),在灵敏度和操作条件方面存在局限性.
研究的目的:
- 研究用于光子计数应用的自动供电多晶光探测器的潜力.
- 识别和减轻限制矿器件光子计数性能的因素.
主要方法:
- 在多晶甲基三化中浅陷状态的表征.
- 捕获减少策略,包括增大粒度和使用二硫化物的表面被动化.
- 矿光子计数探测器 (PCD) 与商业光倍增器 (SiPM) 的性能评估.
主要成果:
- 在谷物边界和表面分别发现了两个主要的浅陷 (5.8 meV和57.2 meV).
- 通过陷缓解,在室温下从超过20,000cps/mm2降低到2cps/mm2.
- 与SiPM相比,实现了优越的弱光响应,更好的马射线光谱分辨率和稳定的高温性能 (高达85°C).
结论:
- 矿光子计数探测器 (PCD) 为SiPM提供了有竞争力的替代品,特别是用于弱光探测.
- 利用独特的缺陷特性,特别是浅层陷,对于推进基于矿的光子计数至关重要.
- 零偏差操作确保了稳定的噪声和检测特性,为矿的应用开辟了新的途径.
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