Journal
OPTICS EXPRESS
Volume 26, Issue 13, Pages 17092-17098Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.26.017092
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Funding
- National Natural Science Foundation of China (NSFC) [61627812, 61605155]
- Technology Coordinate and Innovative Engineering Program of Shaanxi [2016KTZDGY02-03]
- Postdoctoral Science Foundation of China (PSFC) [2015M580850]
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In this study, a Ti-diamond-Ti structured ultraviolet photodetector was fabricated on a homoepitaxial diamond layer with an oxygen-terminated surface. The properties of the Ti/diamond schotticy contact were measured using X-ray photoelectron spectroscopy, and the bather height was found to be 1.15 eV. At a bias of 3 V, the responsivity at 210 nm was only 4.29 mA/W, while at 12 V. the responsivity increased rapidly to 51 mA/W. The increase can be ascribed to the photocurrent gain. With the further increase in voltage. an avalanche effect was produced, and the responsivity could reach 1.18 A/W at 50 V. Moreover, the transient response behavior of the photodetector exhibited a good repeatability and response speed. (C) 2018 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
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