Photoresponse mechanisms of ultraviolet photodetectors based on colloidal ZnO quantum dot-graphene nanocomposites
- Title
- Photoresponse mechanisms of ultraviolet photodetectors based on colloidal ZnO quantum dot-graphene nanocomposites
- Author
- 박원일
- Keywords
- II-VI semiconductors; Quantum dots; Photodetectors; Ultraviolet light; Graphene
- Issue Date
- 2013-01
- Publisher
- AMER INST PHYSICS, 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
- Citation
- Applied Physics Letters, Vol.102, No.2 [2013], p021105-1 ~021105-3
- Abstract
- Ultraviolet (UV) photodetectors were fabricated using the wet spin-coating for ZnO quantum dots (QDs) and the transfer method for the graphene sheet. High-resolution transmission electron microscopy images showed that the ZnO QDs were uniformly distributed between the voids of the surface circumferences on the graphene layers. Current-voltage measurements on the UV photodetector at 300 K showed that the ratio of the photocurrent to the dark current was about 1.1 x 10(4). The rise and the decay times of the UV photodetector were approximately 2 and 1 s, respectively. The photoresponse mechanisms are described on the basis of the experimental results. (C) 2013 American Institute of Physics. [http://dx.doi.org.access.hanyang.ac.kr/10.1063/1.4776651]
- URI
- http://aip.scitation.org/doi/10.1063/1.4776651http://hdl.handle.net/20.500.11754/41510
- ISSN
- 0003-6951
- DOI
- 10.1063/1.4776651
- Appears in Collections:
- COLLEGE OF ENGINEERING[S](공과대학) > MATERIALS SCIENCE AND ENGINEERING(신소재공학부) > Articles
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