Transparent and flexible ultraviolet photodetectors based on colloidal ZnO quantum dot/graphene nanocomposites formed on poly(ethylene terephthalate) substrates

Title
Transparent and flexible ultraviolet photodetectors based on colloidal ZnO quantum dot/graphene nanocomposites formed on poly(ethylene terephthalate) substrates
Authors
박원일
Keywords
Nano-structures; Electrical properties; Optical properties/techniques; Electron microscopy
Issue Date
2015-02
Publisher
ELSEVIER SCI LTD
Citation
COMPOSITES PART B-ENGINEERING, v. 69, NO 0, Page. 154-158
Abstract
Transparent colloidal ZnO quantum-dot (QD)/graphene nanocomposites were formed on poly(ethylene terephthalate) (PET) substrates. Ultraviolet (UV)-visible absorption spectra showed a shoulder peak around 350 nm corresponding to the absorption of ZnO QDs. Optical transmittance of the ZnO QD/graphene/PET multilayer was approximately 80%. High-resolution transmission electron microscopy images showed that the ZnO QDs were distributed along the circumferences of the surfaces on the graphene layers. Current-voltage and current-time measurements on the UV photodetector after bending at 300 K exhibited the ON/OFF switching states and stability resulting from the light-induced conductivity of the flexible graphene layer. © 2014 Elsevier Ltd. All rights reserved.
URI
http://www.sciencedirect.com/science/article/pii/S1359836814004284http://hdl.handle.net/20.500.11754/22455
ISSN
1359-8368; 1879-1069
DOI
http://dx.doi.org/10.1016/j.compositesb.2014.09.026
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > ETC
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