Solar cell front conductive silver paste and preparation method thereof

A technology of solar cells and conductive silver paste, which is applied in the manufacture of cables/conductors, conductive materials dispersed in non-conductive inorganic materials, circuits, etc., can solve the problems of low mass production and yield, and achieve excellent control ability, Excellent fine-line ink penetration, optimized compatibility and lubricating effect
CN114464338APending Publication Date: 2022-05-10DK ELECTRONICS MATERIALS INC
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
DK ELECTRONICS MATERIALS INC
Publication Date
2022-05-10

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Abstract

The invention provides solar cell front conductive silver paste and a preparation method thereof, and the conductive silver paste is prepared from the following materials in parts by weight: 40-50 parts of bisphenol A epoxy resin; 20 to 40 parts of nano silver particles; 30 to 50 parts of nano glass powder; 50-60 parts of an organic carrier mixed solution; 8 to 10 parts of tetraethyl titanate; 6-9 parts of alkaline amine; 5 to 10 parts of anhydride; 8 to 15 parts of a boron trifluoride monoethylamine complex; the organic carrier mixed solution comprises organic acid doped conductive organic polymer / epoxidized soybean oil with the mass fraction concentration of 15%-20% and a high-boiling-point solvent with the mass fraction concentration of 80%-85%. According to the invention, the contact between the inorganic powder and the screen cloth material can be effectively wetted, the more excellent fine line ink penetration capability is provided, the method is suitable for the high-speed printing of the ultra-fine grid of the current large-area silicon wafer, the fine grid line width control capability is excellent, and the better electrode height-width ratio can be formed.
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Description

technical field

[0001] The invention belongs to the technical field of conductive silver paste, and in particular relates to a front conductive silver paste of a solar cell and a preparation method thereof. Background technique

[0002] The conductive silver paste on the front side of solar cells is one of the most critical factors determining the conversion efficiency of solar cells. The screen printing process combined with ultra-fine lines and dense grid design is the most effective way to improve the efficiency of cells and increase the square resistance of silicon wafers. direct method. In recent years, the front-side conductive silver paste consumption of my country's photovoltaic industry has always accounted for more than 75% of the world's share, but domestic and foreign first-tier cell manufacturers still mostly rely on imported products for the selection of high-efficiency front-side silver conductive silver paste. In the past two years, domestic front silver man...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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