Abstract: Disclosed is a carbonaceous nanocomposite including: a substrate; a graphene sheet formed on a top surface of the substrate in parallel with the substrate; and a carbonaceous nanomaterial provided on another surface of the graphene sheet, the nanomaterial having an aspect ratio of 2 to 75,000 to make a predetermined angle with the graphene sheet. The carbonaceous nanocomposite according to the present disclosure has excellent adhesivity to the substrate and can be attached to the substrate without undergoing a pasting process. Since a two-directional current flow is generated, the electrical resistance of the graphene and carbon nanotube is considerably reduced. In addition, the graphene allows the carbon nanotube to have a high current density and a high specific surface area, thereby accelerating a redox reaction. The excellent heat-radiating property of the graphene sheet allows fast transfer of heat generated in the carbon nanotube to outside, thereby avoiding degradation of the carbon nanotube.

Abstract: Disclosed is a method for producing a counter electrode based on electrophoretic deposition of graphene. The method includes: adding graphene to a dispersion medium to prepare a graphene dispersion; dipping a transparent electrode in the graphene dispersion and applying a voltage to the transparent electrode for 5 seconds to 5 minutes to deposit the graphene on the transparent electrode; and annealing the graphene-adsorbed transparent electrode at 350 to 600° C. under a nitrogen atmosphere. Also disclosed are a counter electrode produced by the method and a dye-sensitized solar cell including the counter electrode.

Abstract: Disclosed is a carbonaceous nanocomposite including: a substrate; a graphene sheet formed on a top surface of the substrate in parallel with the substrate; and a carbonaceous nanomaterial provided on another surface of the graphene sheet, the nanomaterial having an aspect ratio of 2 to 75,000 to make a predetermined angle with the graphene sheet. The carbonaceous nanocomposite according to the present disclosure has excellent adhesivity to the substrate and can be attached to the substrate without undergoing a pasting process. Since a two-directional current flow is generated, the electrical resistance of the graphene and carbon nanotube is considerably reduced. In addition, the graphene allows the carbon nanotube to have a high current density and a high specific surface area, thereby accelerating a redox reaction. The excellent heat-radiating property of the graphene sheet allows fast transfer of heat generated in the carbon nanotube to outside, thereby avoiding degradation of the carbon nanotube.