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p型氯掺杂碲化镉中铟和铝肖特基接触的比较

In and Al Schottky Contacts Comparison on P-Type Chlorine-Doped CdTe.

作者信息

Vasylchenko Igor, Grill Roman, Betušiak Marián, Belas Eduard, Praus Petr, Moravec Pavel, Höschl Pavel

机构信息

Institute of Physics, Faculty of Mathematics and Physics, Charles University, Ke Karlovu 5, CZ-12116 Prague 2, Czech Republic.

出版信息

Sensors (Basel). 2021 Apr 15;21(8):2783. doi: 10.3390/s21082783.

DOI:10.3390/s21082783
PMID:33920852
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8071194/
Abstract

The performance of the CdTe radiation detectors heavily relies on the method of contact preparation. A convenient research method addressing this problem is the laser-induced transient current technique. In this paper, we compare the performance of two CdTe crystals which underwent different metallization processes. We showed that appropriately designed Au/Al contacts induce much less bulk polarization than commercial Pt/In electrodes under the same working conditions and can thus provide a convenient alternative to the industry standard. The comparison was based on the monitoring of the time-dependent sensor polarization measuring transient currents excited by above-bandgap laser illumination complemented by the Am 241 gamma spectroscopy. The theoretical analysis of current waveforms and radiation spectra enabled us to determine the charge carrier mobility, mobility-lifetime products of electrons and holes, and temporal and bias dependence of the space charge formation.

摘要

碲化镉辐射探测器的性能在很大程度上依赖于接触制备方法。一种解决该问题的便捷研究方法是激光诱导瞬态电流技术。在本文中，我们比较了两块经历不同金属化工艺的碲化镉晶体的性能。我们表明，在相同工作条件下，经过适当设计的金/铝接触所引起的体极化比商用铂/铟电极少得多，因此可以为行业标准提供一种便捷的替代方案。该比较基于对随时间变化的传感器极化的监测，通过监测由带隙以上激光照射激发的瞬态电流，并辅以镅241伽马能谱分析。对电流波形和辐射光谱的理论分析使我们能够确定电荷载流子迁移率、电子和空穴的迁移率-寿命乘积，以及空间电荷形成的时间和偏置依赖性。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b8dc/8071194/bc9eaa9ffd60/sensors-21-02783-g014.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b8dc/8071194/97efdc8d24f1/sensors-21-02783-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b8dc/8071194/039d344eb08e/sensors-21-02783-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b8dc/8071194/99d0f7090641/sensors-21-02783-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b8dc/8071194/cc105df07e99/sensors-21-02783-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b8dc/8071194/4a45ccc3c47b/sensors-21-02783-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b8dc/8071194/407238e41d0d/sensors-21-02783-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b8dc/8071194/0990d0d44023/sensors-21-02783-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b8dc/8071194/2219e168efd1/sensors-21-02783-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b8dc/8071194/1558d9bebf40/sensors-21-02783-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b8dc/8071194/3c19f19fcb4a/sensors-21-02783-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b8dc/8071194/106f8d0fd6ba/sensors-21-02783-g011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b8dc/8071194/5e5471006231/sensors-21-02783-g012.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b8dc/8071194/28cd810457a9/sensors-21-02783-g013.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b8dc/8071194/bc9eaa9ffd60/sensors-21-02783-g014.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b8dc/8071194/97efdc8d24f1/sensors-21-02783-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b8dc/8071194/039d344eb08e/sensors-21-02783-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b8dc/8071194/99d0f7090641/sensors-21-02783-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b8dc/8071194/cc105df07e99/sensors-21-02783-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b8dc/8071194/4a45ccc3c47b/sensors-21-02783-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b8dc/8071194/407238e41d0d/sensors-21-02783-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b8dc/8071194/0990d0d44023/sensors-21-02783-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b8dc/8071194/2219e168efd1/sensors-21-02783-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b8dc/8071194/1558d9bebf40/sensors-21-02783-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b8dc/8071194/3c19f19fcb4a/sensors-21-02783-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b8dc/8071194/106f8d0fd6ba/sensors-21-02783-g011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b8dc/8071194/5e5471006231/sensors-21-02783-g012.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b8dc/8071194/28cd810457a9/sensors-21-02783-g013.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b8dc/8071194/bc9eaa9ffd60/sensors-21-02783-g014.jpg

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本文引用的文献

1
Self-compensation in chlorine-doped CdTe.氯掺杂碲化镉中的自补偿效应
Sci Rep. 2019 Jun 24;9(1):9194. doi: 10.1038/s41598-019-45625-x.
2
Progress in the Development of CdTe and CdZnTe Semiconductor Radiation Detectors for Astrophysical and Medical Applications.用于天体物理和医学应用的 CdTe 和 CdZnTe 半导体辐射探测器的发展进展。
Sensors (Basel). 2009;9(5):3491-526. doi: 10.3390/s90503491. Epub 2009 May 12.