Method for preparing graphene/Ag composite conductive film

Abstract

The invention belongs to the technical field of inorganic functional materials, and discloses a method for preparing a graphene / Ag composite conductive film. The method provided by the invention is characterized in that a graphene oxide / Ag sol precursor is adopted; and the graphene / Ag composite conductive film which is transparent is obtained by a dip-coating method and heat treatment. The method provided by the invention has the advantages that the dip-coating method is adopted; the viscosity of the graphene oxide / Ag sol precursor is changed by control of a volume ratio of graphene oxide to Ag sol; control of film thickness, film transmittance and film conductivity is realized through control of frequency of dip-coating processes; the method provided by the invention has a simple flow and can be operated easily.

Description

technical field [0001] The invention belongs to the technical field of inorganic functional materials, and particularly refers to a method for preparing a graphene / Ag composite conductive film. The graphene oxide / silver sol is used as a precursor, and a transparent conductive film is obtained after a pulling method and heat treatment. Background technique [0002] Graphene (Graphene) is a two-dimensional carbon atom crystal with a thickness of one atom. It is considered to be the basic structural unit of fullerene, carbon nanotube (CNT) and graphite. Since Science reported in 2004 that it can simply scrape off the first Since a two-dimensional independent graphite sheet, this field has set off a research boom similar to the appearance of carbon nanotubes; graphene films are considered to be an effective way for graphene to be applied in practice, and transparent conductive graphene films are used in new electronic devices. It has great application prospects; at present, many...

AI Technical Summary

Problems solved by technology

[0002] Graphene is a two-dimensional carbon atom crystal with a thickness of one atom, which is considered to be the basic structural unit of fullerene, carbon nanotube (CNT) and graphite Since Science reported in 2004 that the first two-dimensional independent graphite sheet could be scraped off simply by friction, a research boom similar to the appearance of carbon nanotubes has been set off in this field; As an effective way, transparent conductive graphene films have great application prospects in new electronic devices; at present, many methods have been tried to prepare graphene films, such as chemical vapor deposition process based on organic polycyclic aromatic hydrocarbons, based on monolithic The electron beam etching process of the layer, the tailoring process based on vacuum filtration film and the self-assembly process based on electrostatic adsorption are all difficult to achieve effective control of the properties of the film; usually, the better the conductivity of the graphene film, the thickness The larger (that is, the higher the carbon content), but the transmittance will decrease

[0003] The pulling method is a common method for preparing inorganic thin films, but the viscosity of water-soluble graphene is low, and the pulling method cannot be used to make films; the present invention proposes to use graphite oxide Using alkene / Ag sol as a precursor can not only overcome the bottleneck in the film-making process of the pulling method, but also effectively improve the conductivity of the film under the premise of ensuring the light transmittance due to the introduction of Ag. There is no relevant report yet.