Enhanced Electrical Conductivities of Transparent Double-Walled Carbon Nanotube Network Films by Post-treatment

Abstract

We investigated the electrical conductivities of double-walled carbon nanotube (DWNT) network films upon post-treatment via HNO 3 or gold ions, particularly with respect to their potential use as transparent conducting films. Post-treatment of DWNT films with HNO 3 and deposition of gold nanoparticles, respectively, resulted in a significant decrease of the electrical resistance, while the initial value of the transmittance of pristine-DWNT films was maintained. The DWNT-Au nanoparticle hybrid films exhibited the best transmittanceconductivity performance among the evaluated network films, i.e., pristine-SWNT films, pristine-DWNT films, SWNT-Au nanoparticle hybrid films, and HNO 3 -treated DWNT films. The electrical behaviors of the gold nanoparticle-coated and HNO 3 -treated DWNT films were examined by an analysis of the work functions of the DWNT films. The DWNT-Au nanoparticle hybrid films are expected to be applicable to transparent electrodes of various optoelectronic devices such as solar cells, light-emitting diodes, sensors, and fieldeffect transistors.

Emerging Transparent Electrodes Based on Thin Films of Carbon Nanotubes, Graphene, and Metallic Nanostructures

“…Doping by lattice substitution with boron atoms has not yet yielded attractive conductivities 144. The use of a larger molecule such as gold nanoparticles as shown in Figure 8c may be a solution towards increasing the doping stability 145. However, continued research is needed to find a suitably stable p‐type CNT dopant.…”

Enhanced solar energy conversion in Au-doped, single-wall carbon nanotube-Si heterojunction cells

“…As the electrons are depleted from the SCNT film, the hole carrier density increases, leading to the effective p-type doping effect [40-43]. Au doping can shift down the Femi level and enhance the work function of SCNT [44]; therefore, the built-in potential between SCNT and Si junction can be enhanced.…”

Improvement of dispersion of carbon nanotubes in epoxy resin through pyrogallol functionalization

“…Epoxy resin becomes the main application resin due to high bond strength, wide adhesive surface, low shrinkage, high mechanical strength, low prices, and excellent chemical resistance and oil resistance . The most widely used conductive fillers are carbon‐based filler, metals, or metal oxides fillers . Compared to the conventional conductive fillers, carbon nanotubes (CNTs) have good electrical conductivity, strong mechanical properties, and thermal properties.…”