期刊
OPTICS EXPRESS
卷 27, 期 6, 页码 8717-8726出版社
OPTICAL SOC AMER
DOI: 10.1364/OE.27.008717
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资金
- National Natural Science Foundation of China (NSFC) [51872043, 51732003, 61574031]
- 111 project [B13013]
- Key Research Program of Frontier Science, CAS [QYZDB-SSW-SLH014]
- Open Research Fund of Key laboratory of UV-emitting materials and technology [130028855, 130028856]
In this paper, fast rcsponsc, zero-biased, solar-blind UV photodetectors based on graphene/beta-Ga2O3 hetcrojunctions were fabricated by transferring a monolayer graphene onto fresh cleaved beta-Ga2O3 (100) single crystal substrate. At zero bias, the photo responsivi at 254 mu and the UV/visible rejection ratio (R-235 nm/R-400 nm) and the response time are obtained to be 10.3 mA/W and 2.28 x 10(2) and 2.24 mu s, respectively. for the graphene/beta-Ga2O3 (100) detector. The fast response and the high sensitivity can be attributed to the high mobility and UV transparency of graphene top-electrode and the low defect density of the beta-Ga2O3 (100) cleaved surface. Such zero-biased detectors are vei promising for next generation solar-blind UV photodetection. (C) 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
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