期刊
SENSORS AND ACTUATORS A-PHYSICAL
卷 295, 期 -, 页码 623-628出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.sna.2019.06.042
关键词
ZnMgO alloy; Self-Powered; Solar-blind photodetector; Comb-shaped Schottky electrode
资金
- National Natural Science Foundation of China [61475153, 61605200, 61875194, 11727902, 61425021, 61525404]
- Jilin Province Young and Middle-aged Science and Technology Innovation Leaders and Team Project [20180519023JH]
- 100 Talents Program of the Chinese Academy of Sciences, Jilin Province Science Fund for Excellent Young Scholars [20180520173JH]
- Open Project of the State Key Laboratory of Luminescence and Applications [SKLA-2018-05]
We have demonstrated a self-powered solar-blind ultraviolet (UV) photodetector based on the Au/ZnMgO/ZnO:Al vertical structure. The comb-shaped Au was selected as the Schottky electrode due to its high transmittance (more than 60%) in the wavelength region from 200 nm to 300 nm. At 0 V bias, the detector showed a responsivity of 55 mA/W under 265 nm light illumination with the intensity of 80 nW/cm(2), which is larger than that of any other previously reported ZnO-based self-powered UV photodetectors. And a fast response speed can be also clearly observed with 10%-90% rise and 90%-10% decay times of 20 mu s and 300 mu s, respectively. The excellent self-powered solar-blind UV detection of our Au/ZnMgO/ZnO:Al device should be associated with the high external quantum efficiency, especially for the weak signal detection. Our findings offered new chances in high-performance self-powered photodetectors fabrication. (C) 2019 Elsevier B.V. All rights reserved.
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