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Yadav S.,Council of Scientific and Industrial Research Central Scientific Instruments Organisation | Yadav S.,Academy of Scientific and Innovative Research | Kumar V.,Council of Scientific and Industrial Research Central Scientific Instruments Organisation | Kumar V.,Academy of Scientific and Innovative Research | And 7 more authors.
Thin Solid Films | Year: 2015

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 (δdc/δopt) 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 ω/sq. © 2015 Published by Elsevier B.V. All rights reserved.

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