A kind of graphene silver paste and its preparation method and application

Abstract

The invention belongs to the field of a biological material, in particular relates to graphene silver paste and a preparation method and application thereof. The silver paste disclosed by the invention comprises the following constituents by weight: 45-70 parts of graphene-M13, 1-10 parts of graphene-M13-silver compound body and 15-50 parts of organic bonding agent. By the graphene silver paste with light transmittance, the influence of electrode shading can be effectively reduced, and the solar cell conversion efficiency is also favorably improved due to the low resistance and high conductive density of the graphene silver paste; the graphene silver paste is printed on the front surface of a silicon solar cell, and is high in compactness, low in parallel resistance value and high in silicon adhesive force after being sintered; and such graphene silver material is taken as positive electrode silver paste of the solar cell, the silver content in the existing positive electrode silver paste is reduced, the production cost is greatly reduced, the promotion of such green energy source is further assisted, and the graphene silver paste has great market prospect and application value.

Description

technical field [0001] The invention belongs to the field of biological materials, and in particular relates to a graphene silver paste, in particular to a graphene silver paste for a silicon solar cell and a preparation method and application thereof. Background technique [0002] Graphene is currently the thinnest and strongest material found in the world. It is inherently endowed with ultrahigh electron mobility and the lowest electrical resistance at room temperature. It is almost completely transparent, absorbing only 2.3 percent of light. Because of its properties, it is expected to be a material that can be developed and is also suitable for making transparent touch screens, light panels, and even solar cells. The structure of graphene is very stable, and the connection between the internal carbon atoms is very flexible. When an external force is applied, the carbon atoms will bend and deform, so that the carbon atoms do not have to rearrange to adapt to the externa...

AI Technical Summary

Problems solved by technology

[0005] For this reason, the technical problem to be solved by the present invention is to overcome the technical bottleneck of high cost, poor dispersion and poor adhesion of graphene composite silver paste in the prior art, thereby proposing a kind of good dispersion, high compactness and low parallel resistance value , good adhesion with silicon, and low-cost graphene material and its preparation method and application