Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 618, Issue -, Pages 551-554Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2014.09.004
Keywords
Ultraviolet detector; Heterojunction; High responsivity; Red shift
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Funding
- National Natural Science Foundation of China [61274068, 61204055, 51303061]
- Project of Science and Technology Development Plan of Jilin Province [20130206021GX, 20140204056GX]
- Project of Science and Technology Plan of Changchun City [13KG49]
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TiO2 nanowires array is synthesized on the FTO via hydrothermal method, which is modified with ZnO prepared by using the crystallization method. The fabricated ultraviolet detector based on TiO2/ZnO heterojunction possesses high photoelectric performance evaluated by the photo-to-dark current ratio, which has been demonstrated to reach 4 orders of magnitude. The separation of electron-hole pairs is facilitated by the built-in electric field in heterojunction, resulting in a large photocurrent as well as a high responsivity, which can attain 150 A/W. Compared with the pure TiO2 device, The red shift in both absorption spectrum and photo response provides a potential application for the TiO2/ZnO device. (C) 2014 Elsevier B.V. All rights reserved.
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