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PERC crystal silicon solar battery positive silver paste and preparation method therefor

A solar cell and silver paste technology, which is applied in the manufacture of cables/conductors, conductive materials dispersed in non-conductive inorganic materials, circuits, etc., can solve problems such as increased contact resistance and reduced photoelectric conversion efficiency, and reduce sintering The effect of temperature

Inactive Publication Date: 2017-10-10
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

At this sintering temperature, the contact resistance of conventional back silver becomes larger, which leads to a decrease in photoelectric conversion efficiency

Method used

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  • PERC crystal silicon solar battery positive silver paste and preparation method therefor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The composition of the positive silver conductive paste in this embodiment and its weight percentage: silver powder 85%, glass powder 3%, organic carrier 8%, Ce 2 O 3 0.02%, La 2 O 3 0.05%, BYK180 0.2%, the rest is solvent. The particle size of the silver powder is 1~3.5 microns, and the tap density is 4~6g / m 3 Spherical silver powder; glass powder is PbO-TeO 2 Series of glass powder with a particle size of 0.5-3 microns.

[0027] Preparation of organic carrier: rosin 1%, cellulose acetate 2%, polyester 5%, dimethyl phthalate 30%, butyl carbitol acetate 30%, alcohol ester twelve 30%, at 80°C Dissolve for 2 hours to obtain a uniform organic carrier;

[0028] Weigh 85% silver powder, 3% glass powder, 8% organic carrier, Ce 2 O 3 0.02%, La 2 O 3 0.05%, BYK180 0.2%, mix uniformly in a planetary mixer or other mixers, and then disperse it to less than 10μm on a three-roller to make a crystalline silicon solar cell positive silver paste. The positive silver paste of the cryst...

Embodiment 2

[0031] The composition and weight percentage of the positive silver conductive paste of this embodiment: 75% silver powder, 5% glass powder, 10% organic carrier, Nd 2 O 3 0.02%, Eu 0.02%, the rest is solvent. The particle size of the silver powder is 1.5~3.5 microns, and the tap density is 4~6g / m 3 Spherical silver powder; glass powder is PbO-TeO 2 Series of glass powder with a particle size of 0.5-3 microns.

[0032] Preparation of organic vehicle: ethyl cellulose 3%, polyamide 2%, cellulose acetate 10%, terpineol 20%, propylene glycol butyl ether 20%, alcohol ester twelve 30%, dissolved at 80°C for 2 hours, Obtain a uniform organic carrier;

[0033] Weigh 75% silver powder, 5% glass powder, 10% organic carrier, Nd according to the formula ratio 2 O 3 0.02%, Eu 0.02%, the rest is solvent, mix them evenly in a planetary mixer or other mixers, and then disperse them to less than 10μm on a three-roller machine to make positive silver paste for crystalline silicon solar cells. The ...

Embodiment 3

[0036] The composition and weight percentage of the positive silver conductive paste of this embodiment: 80% silver powder, 3% glass powder, 5.5% organic carrier, Gd 2 SO 3 0.02%, Er 2 CO 3 0.02%, the rest is solvent. The particle size of the silver powder is 1.5~3.5 microns, and the tap density is 4~6g / m 3 Spherical silver powder; glass powder is PbO-TeO 2 Series of glass powder with a particle size of 0.5-3 microns.

[0037] Preparation of organic carrier: 3% acrylic resin, 8% vinyl acetate resin, 50% propylene glycol butyl ether, and 40% ethylene glycol butyl ether were dissolved at 80°C for 2 hours to obtain a uniform organic carrier;

[0038] Weigh 80% silver powder, 3% glass powder, 5.5% organic carrier, Gd according to the formula ratio 2 SO 3 0.02%, Er 2 CO 3 0.02%, the rest is solvent. Mix it evenly in a planetary mixer or other mixers, and then disperse it to less than 10μm on a three-roller to make a crystalline silicon solar cell positive silver paste. The slurry i...

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Abstract

The invention relates to the technical field of an electronic material, and particularly to PERC crystal silicon solar battery positive silver paste. The 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 0.01-0.2% of fluxing agent, wherein the sum of the component contents is equal to 100%; and the fluxing agent is one or several kinds of metal or metal oxide or metal resinate selected from La, Ce, Nd, Eu, Gd, Tm or Er. By adding metal or metal oxide or metal resinate to the paste, the needed temperature in sintering is lowered, so that the paste is suitable for low-temperature sintering and the PERC technological use can be satisfied.

Description

Technical field [0001] The invention relates to the technical field of electronic materials, in particular to a PERC crystalline silicon solar cell positive silver paste and a preparation method thereof. Background technique [0002] At present, with the development of society, energy consumption is increasing, and traditional fossil energy is becoming increasingly scarce, and its harm to the environment is becoming more and more prominent. This makes solar energy as a clean, safe and renewable energy source attracting attention. Solar cells are a common situation in the world to develop and utilize solar energy, and conductive silver paste is the main raw material for preparing solar cells. [0003] Passivated emitter and back local contact cell (PERC) was first developed by the University of New South Wales. Due to the double-sided passivation of the battery, the back electrode adopts the form of local contact, which effectively reduces the surface recombination and reduces The ...

Claims

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Application Information

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IPC IPC(8): H01B1/22H01B13/00H01L31/0224
CPCH01B1/22H01B13/00H01L31/022425Y02E10/50
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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