A transparent conductive electrode comprised of alternating layers of graphene grown by chemical vapor deposition (CVD) and metallic single wall nanotubes (M-SWNTs) is presented. It was found that the addition of two single-layer graphene sheets enhances the conduction pathways in the M-SWNT film, yielding up to a 75% decrease in the sheet resistance with little sacrifice in the optical transmittance. Enhancements in the electrical properties of the films were made through a heat treatment process followed by nitric acid and thionyl chloride doping, yielding a sheet resistance of 70 Ω/sq with a transmittance of 78% at 550 nm. Composite films having undergone an annealing step were found to have stable electrical properties upon exposure to atmospheric conditions while doped films demonstrated limited stability.

Volume Subject Area:
Materials and Processes
Topics:
Composite materials, Electrodes, Graphene, Single-walled carbon nanotubes, Transparency, Single-walled nanotubes, Chemical vapor deposition, Electrical properties, Annealing, Heat conduction, Heat treating (Metalworking), Stability
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