Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 675, Issue -, Pages 325-330Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2016.03.051
Keywords
ZnO; Cu2O; Self-powered; Photodetector; UV-visible
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Funding
- Natural Science Foundation of China (NSFC) [51474017]
- Fundamental Research Funds for the Central Universities [FRF-TP-15-107A1]
- China Postdoctoral Science Foundation [2015M580979]
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ZnO/Cu2O branched heterojunction arrays (BHAs) were synthesized via hydrothermal and chemical bath deposition process for the application in photoelectrochemical type self-powered UV-visible photodetectors. At zero bias, the photodetectors based on the ZnO/Cu2O nanowire/electrolyte heterojunctions exhibited high responsivities of 19.3 mAW(-1) and 8.2 mAW(-1) for UV and visible light, respectively, with a rise time of 0.14 s and a decay time of 0.36 s. The spectral response measurements carried out on the self-powered photodetectors based on ZnO/Cu2O BHAs demonstrate a significant increase of responsivity in the visible region compared to ZnO nanowire arrays (NWAs). The excellent photodetecting performance, low cost, non-toxic, and facile fabrication process make the photoelectrochemical type self-powered photodetectors based on metal oxide semiconductors promising candidates for next-generation UV-visible photosensing applications. (C) 2016 Elsevier B.V. All rights reserved.
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