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在高流量CdZnTe探测器上使用高性能金接触器
Manuele Bettelli1, Silvia Zanettini2, Leonardo Abbene3
1IMEM-CNR, 43124, Parma, Italy. manuele.bettelli@imem.cnr.it.
Scientific reports
|October 20, 2023
概括
新的白金电接触器显著改善了高级X射线应用的高流量 Telluride (CZT) 探测器. 这些优化的接触器减少了泄漏电流,提高了检测器在高光子流量环境中的性能.
科学领域:
- 材料科学 材料科学 材料科学
- 半导体物理 半导体物理
- 在X射线检测技术.
背景情况:
- 对高流量X射线探测器的需求随着第四代同步光源和先进的医疗/工业成像技术的发展而激增.
- 标准的甲 (CZT) 探测器 (LF-CZT) 在高光子流量下受到极化效应和高暗电流的影响.
- 新型 Telluride (CZT) 材料 (HF-CZT) 提供了改进的孔运输,但需要优化电气接触.
研究的目的:
- 对高流量 Telluride (HF-CZT) 探测器的新型喷雾电接触器进行研究和描述.
- 为了解决HF-CZT设备上的标准接触器所观察到的高暗泄漏电流的问题.
- 为了评估使用优化接口的高频-CZT探测器的性能提升.
主要方法:
- 使用喷雾金阳极和阴极接触器制造和测试HF-CZT探测器.
- 电气和光谱调查以评估探测器性能.
- 传输电子显微镜 (TEM) 和聚焦离子束 (FIB) 对/CZT接口的分析.
主要成果:
- 优化的喷金接触器在HF-CZT探测器上表现出卓越的性能.
- 与或金阴极相结合的白金阳极产生了最好的结果,显著减少了黑暗泄漏电流.
- 在TEM/FIB分析中,Pt/CZT接口上发现了CdTeO3氧化物的存在,这为接触行为提供了洞察力.
结论:
- 喷射接口有效地减轻HF-CZT探测器中的暗泄漏电流.
- 优化的 Pt/CZT 接触提高了探测器适用于高流量X射线应用的适用性.
- 了解接口化学对于进一步开发高性能X射线探测器至关重要.
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