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Crystalline silicon solar cell positive silver paste and preparation method therefor

A technology of solar cells and silver paste, which is applied in the manufacture of cables/conductors, conductive materials dispersed in non-conductive inorganic materials, circuits, etc., can solve problems such as microcracks and increased contact resistance, and achieve improved service life and improved Welding tension, the effect of high welding tension

Inactive Publication Date: 2017-11-03
北京市合众创能光电技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the shrinkage of the paste coating film during the firing process, the increase in contact resistance or the generation of micro-cracks, these problems adversely affect the performance of solar cells

Method used

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  • Crystalline silicon solar cell positive silver paste and preparation method therefor

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The composition and weight percent of the positive silver conductive paste in this embodiment: 80% silver powder, 3% glass powder, 6% organic vehicle, Co 2 o 3 0.02%, Pd 2 S 3 0.01%, BYK110 0.2%, and the rest is solvent, in which the particle size of silver powder is 1-3.5 microns, and the tap density is 4-6g / m 3 The spherical silver powder; the glass powder is PbO-TeO 2 A series of glass powders with a particle size of 0.5-3 microns.

[0021] Preparation of organic vehicle: 1% rosin, 2% ethyl cellulose, 5% polyester, 50% ethylene glycol phenyl ether, 20% butyl carbitol acetate, 20% alcohol ester twelve, at a temperature of 80 ° C Dissolved for 2 hours to obtain a uniform organic carrier;

[0022] Weigh 80% of silver powder, 3% of glass powder, 6% of organic carrier, Co 2 o 3 0.02%, Pd 2 S 3 0.01%, BYK110 0.2%, and the rest is solvent. Mix evenly in a planetary mixer or other mixer, and then disperse on a three-roller machine to less than 10μm to make front ...

Embodiment 2

[0025] The composition and weight percentage of front silver conductive paste of this embodiment: silver powder 78%, glass powder 4.5%, organic vehicle 8%, W 2 o 3 0.05%, the rest is solvent, in which the particle size of the silver powder is spherical silver powder with a particle size of 1.5-3.5μm and a tap density of 4-6g / m3; the glass powder is PbO-TeO 2 A series of glass powder, the particle size is 0.5~3μm.

[0026] Preparation of organic vehicle: acrylic resin 3%, polyamide 2%, cellulose acetate 10%, terpineol 20%, propylene glycol butyl ether 20%, tributyl citrate 30%, dissolved at 80°C for 2 hours to obtain Uniform organic carrier;

[0027] Weigh 78% of silver powder, 4.5% of glass powder, 8% of organic carrier, W 2 o 3 0.05%, the rest is solvent, mixed evenly in a planetary mixer or other mixer, and then dispersed on a three-roller machine to less than 10μm, and then the front silver paste for crystalline silicon solar cells can be made. The slurry is filtered...

Embodiment 3

[0030] The composition and weight percentage of front silver conductive paste in this embodiment: silver powder 85%, glass powder 4%, organic vehicle 7%, Os 2 SO 3 0.02%, Re 2 CO 3 0.02%. Among them, the particle size of the silver powder is spherical silver powder with a particle size of 1.5-3.5 μm and a tap density of 4-6 g / m3; the glass powder is PbO-TeO 2 A series of glass powders with a particle size of 0.5-3μm.

[0031] Preparation of organic vehicle: 3% acrylic resin, 8% polyester, 50% propylene glycol butyl ether, and 40% terpineol were dissolved at 80°C for 2 hours to obtain a uniform organic vehicle;

[0032] Weigh 85% of silver powder, 4% of glass powder, 7% of organic carrier, Os 2 SO 3 0.02%, Re 2 CO 3 0.02%, mix evenly in a planetary mixer or other mixer, and then disperse on a three-roller machine to less than 10μm to make a front silver paste for crystalline silicon solar cells. The slurry is filtered through a 400-mesh sieve to obtain a very unifo...

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Abstract

The invention relates to the technical field of an electronic material, and particularly relates to crystalline silicon solar cell positive silver paste and a preparation method therefor. The crystalline silicon solar cell positive silver paste comprises the following components based on mass percentages: 1-90% of silver powder, 5-15% of organic carrier, 1-8% of glass powder, 0-3% of auxiliaries, and 0.02-0.1% of sintering inhibitor, wherein the sum of the contents of the components is equal to 100%; the sintering inhibitor is one or several kinds of metals or metal oxides or metal resinate selected from Co, Ru, Rh, Pd, W, Re, Os, Ir or PT; and the paste is also added with metals or metal oxides or metal resinate, so that certain problems caused by paste shrinkage in the sintering process of the paste can be solved, and shortcomings generated in the sintering process can be avoided.

Description

technical field [0001] The invention relates to the technical field of electronic materials, in particular to a front silver paste for a crystalline silicon solar cell and a preparation method thereof. Background technique [0002] At present, with the development of society, energy consumption is increasing, traditional fossil energy is increasingly scarce, and its harm to the environment is becoming increasingly prominent, which makes solar energy, as a clean, safe and renewable energy source, attract much attention. Solar cells are a common situation in the development and utilization of solar energy in the current world, and conductive silver paste is the main raw material for preparing solar cells. These problems adversely affect the performance of solar cells due to shrinkage of the paste coating film during firing, increased contact resistance or generation of microcracks. Therefore, the development of solar cell positive conductive silver paste that solves the relat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B1/22H01B13/00H01L31/0224
CPCH01B1/22H01B13/00H01L31/022425
Inventor 赵德平任中伟丁兴隆
Owner 北京市合众创能光电技术有限公司
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