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Abstract
In this work, Graphene/Copper Nanowire (G/CuNW) based transparent conducting electrodes (TCEs) were prepared via spin-assisted layer-by-layer (LBL) deposition. 3-aminopropyltriethoxysilane (ɣ-APS) functionalized glass substrates were sequentially spin-coated with graphene oxide (GO) and CuNWs. Then, to enhance the electrical conductivity, the multilayer films were subjected to chemical reduction and thermal annealing. The ultimate films were characterized by a scanning electron microscope, UV–Vis spectrometer, and sheet resistance using a four-point probe method. 3-bilayer G/CuNWs films exhibited sheet resistance of 9 Ω/sq and optical transmittance of 67% (at 550 nm), which is comparable to commercial ITO electrode in terms of mainly sheet resistance.
Highlights
Transparent conducting electrodes (TCEs) are the key component of many modern optoelectronic devices including solar cells, light-emitting diodes and touch screens
Graphene/Copper Nanowire (G/CuNW) based transparent conducting electrodes (TCEs) were prepared via spin-assisted layer-by-layer (LBL) deposition. 3-aminopropyltriethoxysilane (ɣ-APS) functionalized glass substrates were sequentially spin-coated with graphene oxide (GO) and CuNWs
The ultimate films were characterized by a scanning electron microscope, UV–Vis spectrometer, and sheet resistance using a four-point probe method. 3-bilayer G/CuNWs films exhibited sheet resistance of 9 Ω/sq and optical transmittance of 67%, which is comparable to commercial indium tin oxide (ITO) electrode in terms of mainly sheet resistance
Summary
Transparent conducting electrodes (TCEs) are the key component of many modern optoelectronic devices including solar cells, light-emitting diodes and touch screens. Owing to its low sheet resistance (~15 Ω/sq) and relatively high optical transmission (~85%), indium tin oxide (ITO) is the industrially accepted material. Various nanomaterials including conducting polymers, carbon nanotubes, graphene and silver nanowires have been introduced as novel TCE material [2]. Silver nanowires (AgNWs) have been extensively utilized in organic solar cells, organic light emitting diodes and displays owing to their high electrical con ductivity, mechanical flexibility, and high transparency [3,4]. Copper nanowires (CuNWs) are a promising TCE candidate because of their high intrinsic conductivity as well as the abundancy and lower cost of copper compared to silver. The oxidation prob lem of the CuNWs deteriorates their electrical properties, which in turn limits their widespread use in the TCEs [5,6]
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