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

Abstract

The present invention disclosed an organic carrier and its preparation method for crystal silicon solar battery electrode pulp. According to the quality score, the organic carrier includes 5%to 20%of organic resin, 60%to 85%of organic solvents, 1%1%~ 10%tactile and 1%to 10%wetting dispersant.The preparation method includes the following steps: (1) mixing the organic resin and organic solvents to dissolve to obtain a transparent resin solution;Organic carriers for pulp.The organic carrier of the present invention has good tactitivity, obvious shearing and thinning effect, high -level high and width than fine electrode grille lines, and high printing resolution. The preparation methods are simple, convenient to operate, and low cost.

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...

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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.

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