Improved performance of SiC radiation detectors due to optimized ohmic contact electrode by graphene insertion

doi:10.1016/j.diamond.2021.108355

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	Improved performance of SiC radiation detectors due to optimized ohmic contact electrode by graphene insertion
	Y. Jia; X. Sun; Z. Shi; K. Jiang; T. Wu; H. Liang; X. Cui; W. Lu and D. Li
	2021
发表期刊	Diamond and Related Materials
ISSN	9259635
卷号	115
摘要	SiC as a typical wide bandgap semiconductor has exhibited potential application in alpha particle detectors. However, due to the comparatively high annealing temperature required for traditional fabrication technique of ohmic electrode, it is easy to excite impurities in the SiC epilayer, which act as scattering centers result in the declined device performance. In present work, a graphene layer is inserted between metal ohmic electrode and SiC. The graphene promotes the formation of carbon compounds and thus decreases ohmic contact resistance. Meanwhile, due to the Fermi level adjustable of graphene by external bias, the barrier of interface at graphene insert layer is enlarged at reverse bias. The built-in field accelerates the separation of photo-generated electron-hole pairs. As a result, the graphene inserted device annealed at 400 C achieved a 3.9%@-40 V energy resolution, and the device even without annealing achieved a 4.4%@-40 V energy resolution for 239Pu alpha source, which are both better than that of traditional device without graphene layer annealed at 880 C (6%@-40 V). The detailed mechanism has been discussed and suggested. Present work provides an effective strategy to improve device performance. 2021 Elsevier B.V.
DOI	10.1016/j.diamond.2021.108355
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收录类别	SCI ; EI
引用统计
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/65329
专题	中国科学院长春光学精密机械与物理研究所
推荐引用方式 GB/T 7714	Y. Jia,X. Sun,Z. Shi,et al. Improved performance of SiC radiation detectors due to optimized ohmic contact electrode by graphene insertion[J]. Diamond and Related Materials,2021,115.
APA	Y. Jia.,X. Sun.,Z. Shi.,K. Jiang.,T. Wu.,...&W. Lu and D. Li.(2021).Improved performance of SiC radiation detectors due to optimized ohmic contact electrode by graphene insertion.Diamond and Related Materials,115.
MLA	Y. Jia,et al."Improved performance of SiC radiation detectors due to optimized ohmic contact electrode by graphene insertion".Diamond and Related Materials 115(2021).

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