Organic carrier for crystalline silicon solar cell electrode slurry and preparation method thereof

Abstract

The invention discloses an organic carrier for crystalline silicon solar cell electrode slurry and a preparation method thereof. The organic carrier comprises the following components by mass percent: 5-20% of organic resin, 60-85% of an organic solvent, 1-10% of a thixotropic agent and 1-10% of a wetting dispersant. The preparation method comprises the following steps: (1) mixing and dissolving the organic resin and the organic solvent to obtain transparent resin solution; and (2) adding the thixotropic agent and the wetting dispersant to the transparent resin solution to mix and activate, so as to obtain the organic carrier for the crystalline silicon solar cell electrode slurry. The organic carrier disclosed by the invention is good in thixotropy, significant in shear thinning effect, high in printing resolution, simple in preparation method and process, convenient to operate and low in cost, and can print a thin electrode grid line with large depth-width ratio.

Description

technical field [0001] The invention relates to the field of crystalline silicon solar cells, in particular to an organic carrier for crystalline silicon solar cell electrode paste and a preparation method thereof. Background technique [0002] For crystalline silicon solar cells, in order to output the electric energy of the battery, two positive and negative electrodes must be made on the battery. The current manufacturing method of electrodes for commercial crystalline silicon solar cells is to print rear aluminum paste, rear silver paste and front silver paste respectively on the manufactured silicon wafers, and then form electrodes by co-firing once. The back aluminum, back silver and front silver pastes, which are necessary materials in the metallization process of crystalline silicon solar cells, are the key materials required for the production of crystalline silicon solar cell devices, and their performance will directly affect the performance of crystalline silicon...

AI Technical Summary

Problems solved by technology

[0004] However, the traditional organic vehicle only pays attention to the fluidity of the slurry, that is, the printability, but ignores the shear thinning characteristics of the slurry and the viscosity recovery after shear thinning, resulting in the preparation of the slurry in the printing of large height and width. There are difficulties in the thinner electrode grid lines, and the printed film layer is easy to collapse, which makes the film layer wider and lower in height, which in turn increases the shading area of ​​the electrode grid lines and affects the conversion efficiency.

Images