A conductive paste and preparation method and application

The present invention discloses a conductive paste and preparation method and application. The slurry of the raw materials by the mass percentage of the following composition: 30 to 40% silver - graphene composite material, 30 to 48% of an organic resin, 5 to 10% crosslinking agent and 12 to 26% diluent . Wherein the silver - graphene composite material obtained by the following method: The organic silver oxide and graphite were added and the organic solvent system of deionized water in an ultrasonic dispersion; mixing system while stirring, hydrazine hydrate was added dropwise to the mixture system; after stirring at room temperature for 20 ~ 30min, warmed to 60 ~ 70 ℃, reaction 2 ~ 3h, cooled to room temperature, filtered, washed with deionized water, and dried in vacuo to give a silver - graphene composite material. The present invention can meet the conditions at lower silver content demand on the electrical properties of the photovoltaic device for a flexible substrate, the substrate with the adhesion of the ITO material, resistance to temperature and humidity performance, excellent in fine-line printing performance is significantly reduce the production cost of the slurry.