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Fabrication of ultrathin, free-standing, transparent and conductive graphene/multiwalled carbon nanotube film with superior optoelectronic properties

Title
Fabrication of ultrathin, free-standing, transparent and conductive graphene/multiwalled carbon nanotube film with superior optoelectronic properties
Author
VANISH KUMAR
Keywords
Transparent electrodes; Graphene; Multi-walled carbon nanotubes; Hybrid films; Thin films; Free standing; Sheet resistance; Transmittance; Optoelectronics; Optical conductivity
Issue Date
2015-11
Publisher
ELSEVIER SCIENCE SA
Citation
THIN SOLID FILMS, v. 595, Page. 193-199
Abstract
Here we report a wet chemical technique to obtain transparent electrodes for optoelectronic devices. This technique is simple, facile, low cost and an effective way to prepare ultrathin free standing hybrid graphene/multiwalled carbon nanotubes (MWCNT) films. The graphene/MWCNT films, up to 36 mm in diameter, with controllable thickness and root mean square surface roughness of the order of 12.6 nm are prepared. The ratio of graphene/MWCNT is optimized to make them free standing and easily transferrable on various substrates. The ratio of direct current conductivity to the optical conductivity (sdc/sopt) which is considered as figure of merit for transparent conductors, is enhanced to 10.27 for graphene/MWCNT hybrid films. The prepared films showed outstanding transmittance up to 87.3 +/- 1% at 550 nm, 87.9 +/- 1% at 800 nm and sheet resistance of 136 +/- 22.4 Omega/sq. (C) 2015 Elsevier B.V. All rights reserved.
URI
http://www.sciencedirect.com/science/article/pii/S0040609015010949?via%3Dihubhttp://hdl.handle.net/20.500.11754/28991
ISSN
0040-6090
DOI
10.1016/j.tsf.2015.11.002
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > CIVIL AND ENVIRONMENTAL ENGINEERING(건설환경공학과) > Articles
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