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Strong dependence of photocurrent on illumination-light colors for ZnO/graphene Schottky diode
- Authors
- Lee, Hwauk; An, Namhyun; Jeong, Seockjin; Kang, Soonhong; Kwon, Soonki; Lee, Jisu; Lee, Youngmin; Kim, Deuk Young; Lee, Sejoon
- Issue Date
- Apr-2017
- Publisher
- ELSEVIER SCIENCE BV
- Keywords
- Graphene; Zinc oxide; Schottky diode; Color-dependent photo-current
- Citation
- CURRENT APPLIED PHYSICS, v.17, no.4, pp 552 - 556
- Pages
- 5
- Indexed
- SCI
SCIE
SCOPUS
KCI
- Journal Title
- CURRENT APPLIED PHYSICS
- Volume
- 17
- Number
- 4
- Start Page
- 552
- End Page
- 556
- ISSN
- 1567-1739
1878-1675
- Abstract
- The ZnO/graphene Schottky diode reveals a strong dependence of its photocurrent on the color of the illuminating lights (i.e., a dependence of photocurrent on the photon energy). As the photon energy increases, the magnitude of photocurrent is exponentially increased. Particularly, in comparison with the red-light illumination, the device clearly exhibits approximately 100-times-increased photocurrent when illuminating the ultra-violet light. We attribute this feature to the increase in photo-excited carriers at the depletion region in ZnO. The results suggest that the ZnO/graphene Schottky diode holds promise for the application in high-performance color-selectable photodetectors. (C) 2017 Elsevier B.V. All rights reserved.
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