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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

Pending Publication Date: 2022-05-10
DK ELECTRONICS MATERIALS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The light shielding is reduced through the thin-line grid line design, and higher current is generated, which is not only higher battery conversion efficiency, but also effectively meets the needs of reducing cost and unit consumption. However, the evolution of this ultra-thin line trend is also At the same time, it faces the problem of low mass production yield under high-speed printing

Method used

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  • Solar cell front conductive silver paste and preparation method thereof
  • Solar cell front conductive silver paste and preparation method thereof
  • Solar cell front conductive silver paste and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] The present embodiment provides a kind of solar cell positive conductive silver paste, the preparation material of described conductive silver paste, by weight, comprises the following components:

[0041]

[0042]

[0043] The organic carrier mixed solution includes dodecylbenzenesulfonic acid doped polyfuran / epoxy soybean oil with a mass fraction concentration of 15%, and butyl soluble anhydride acetate with a mass fraction concentration of 85%.

[0044] Wherein, the preparation method of dodecylbenzenesulfonic acid doped polyfuran / epoxy soybean oil comprises the following steps:

[0045] M1: Mix 4 parts of aniline and 15 parts of dodecylbenzenesulfonic acid in 300 parts of distilled water, and stir at 200 rpm for 60 minutes at 0°C to form a mixed solution;

[0046] M2: Slowly add 12 parts of ammonium persulfate and 12 parts of polyfuran to the mixed solution obtained in the M1 step, so that the molar ratio of ammonium persulfate, dodecylbenzenesulfonic acid and...

Embodiment 2

[0061] The present embodiment provides a kind of solar cell positive conductive silver paste, the preparation material of described conductive silver paste, by weight, comprises the following components:

[0062]

[0063] The organic carrier mixed solution includes camphorsulfonic acid doped polyacetylene / epoxy soybean oil with a mass fraction concentration of 20%, and diethylene glycol ethyl ether acetate with a mass fraction concentration of 80%.

[0064] Wherein, the preparation method of camphorsulfonic acid doped polyacetylene / epoxy soybean oil comprises the following steps:

[0065] M1: Mix 5 parts of aniline and 12 parts of camphorsulfonic acid in 250 parts of distilled water, and stir at 2°C for 50 minutes at 220 rpm to form a mixed solution;

[0066] M2: Slowly add 10 parts of ammonium persulfate and 15 parts of polyacetylene to the mixed solution obtained in the M1 step, so that the molar ratio of ammonium persulfate, camphorsulfonic acid and polyacetylene is 0.75...

Embodiment 3

[0081] The front conductive silver paste of a solar cell provided in this embodiment, the preparation material of the conductive silver paste, in parts by weight, includes the following components:

[0082]

[0083] The organic carrier mixed solution includes p-toluenesulfonic acid doped poly-p-phenylene / epoxy soybean oil with a mass fraction concentration of 18%, and diethylene glycol butyl ether acetate with a mass fraction concentration of 82%.

[0084] Wherein, the preparation method of described p-toluenesulfonic acid doped poly-p-phenylene / epoxy soybean oil comprises the following steps:

[0085] M1: Mix 7 parts of aniline and 10 parts of p-toluenesulfonic acid in 200 parts of distilled water, and stir at 250 rpm for 45 minutes at 4°C to form a mixed solution;

[0086]M2: Slowly add 15 parts of ammonium persulfate and 10 parts of poly-p-phenylene to the mixed solution obtained in the M1 step, so that the molar ratio of ammonium persulfate, p-toluenesulfonic acid and p...

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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.

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

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B1/16H01B1/22H01B13/00H01L31/0224
CPCH01B1/16H01B1/22H01B13/00H01L31/022425Y02E10/50
Inventor 史卫利黄立夫
Owner DK ELECTRONICS MATERIALS INC
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