Journal
OPTICAL MATERIALS
Volume 80, Issue -, Pages 149-153Publisher
ELSEVIER
DOI: 10.1016/j.optmat.2018.04.047
Keywords
Well-aligned ZnO nanowire arrays; Chemical bath deposition; Ultraviolet photodetector; Responsivity
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Funding
- Natural Science Foundation of Shaanxi Province [2017JM6090]
- Natural Science Foundation of the Education Bureau of Shaanxi Province, China [15JK1149]
- Natural Science Foundation of Shaanxi University of Technology [SLGQD15-12]
- Open Foundation of State Key Laboratory of Electronic Thin Films and Integrated Devices [KFJJ201602]
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Well-aligned zinc oxide (ZnO) nanowire arrays were grown on an interdigital patterned fluorine tin oxide (FTO)coated glass substrate by a facile chemical bath deposition at low temperature. Morphology, crystalline structure, and optical properties of the ZnO nanowire arrays were analyzed in detail. The results revealed that the ZnO nanowires had wurtzite structure, typically similar to 40-60 nm in diameter, and similar to 700-800 nm in length, a great number of highly uniform and dense nanowires grew vertically on the substrate to form the well-aligned ZnO nanowire arrays, which had very high optical transmission (> 86%) in the visible light region. In addition, the performance of ZnO nanowire arrays ultraviolet (UV) photodetector was systematically examined. The photosensitivity (S), responsivity (R), response and decay time of the photodetector were 703 at + 0.2 V, 113 A/W at +5 V, 23 s and 73 s respectively. Also, the photoresponse mechanism of the UV photodetector was illuminated in terms of the oxygen adsorption-photodesorption process.
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