期刊
IEEE ELECTRON DEVICE LETTERS
卷 42, 期 12, 页码 1755-1758出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LED.2021.3124919
关键词
Detectors; PIN photodiodes; Energy resolution; Alpha particles; Low voltage; Substrates; Performance evaluation; GaN; alpha-particle detectors; charge collection efficiency; energy resolution
资金
- National Natural Science Foundation of China (NSFC) [61634002, 62104095, 62104096]
- National Natural Alliance Foundation (NSAF) [U1830109]
- Key Project of Jiangsu Province, China [BE2021026]
- China Postdoctoral Science Foundation [2021M691500]
In this study, a low-voltage p-i-n GaN-based alpha-particle detector with excellent energy resolution was fabricated. Superior performances were achieved by artificially enlarging the path of alpha particles in the depletion region and utilizing high crystal quality epitaxial film grown on a single-crystal GaN substrate. The results are expected to advance the research of radiation-hardened GaN-based detectors.
The pursuit of low power consumption, high charge collection efficiency (CCE), and high energy resolution is critical for the development of high performance GaN-based alpha-particle detectors. In this letter, we fabricated a low-voltage p-i-n GaN-based alpha-particle detector with superior energy resolution. The detector exhibits a very low leakage current of pA level even at -100 V and high CCEs of 31% and 92% at zero bias and reverse bias of 50 V, respectively. Meanwhile, the detector demonstrates a high energy resolution of 2.48% at -20 V. These excellent performances are attributed to the artificially enlarged path of alpha particles in the depletion region by employing the angular incidence measurement method and the high crystal quality of the epitaxial film grown on a single-crystal GaN substrate. In addition, the damage events caused by the alpha particles are also investigated using the Monte Carlo calculation. These results are anticipated to promote the research of radiation-hardened GaN-based detectors.
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