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A kind of perc crystalline silicon solar cell back passivation silver paste with high back pull force and anti-cracking and preparation method thereof

A solar cell, crystalline silicon technology, applied in cable/conductor manufacturing, conductive materials dispersed in non-conductive inorganic materials, circuits, etc., can solve problems such as no PERC paste, and achieve superior electrical performance, low production cost, Stable performance

Active Publication Date: 2020-03-20
HANGZHOU RIGHTSILVER ELECTRONICS MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Apart from this, so far no other PERC pastes have been launched in the industry

Method used

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  • A kind of perc crystalline silicon solar cell back passivation silver paste with high back pull force and anti-cracking and preparation method thereof
  • A kind of perc crystalline silicon solar cell back passivation silver paste with high back pull force and anti-cracking and preparation method thereof
  • A kind of perc crystalline silicon solar cell back passivation silver paste with high back pull force and anti-cracking and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) Preparation of glass powder: Weighing: SiO 2 14.2 parts, Al 2 o 3 6.6 parts, TeO 2 17.0 parts, ZnO 28.8 parts, Bi 2 o 3 27.2 copies, WO 3 6.2 parts. After mixing the above materials evenly, preheat at 600°C for 15 minutes, melt at 1200°C for 1 hour, quench with deionized water and dry, then ball mill for 20 hours, and the average particle size is less than 5 microns after sieving and drying glass powder.

[0028] (2) Preparation of organic system: Weigh: 20.5 parts of ethyl cellulose, 7.5 parts of polyvinyl butyral, 30.3 parts of butyl carbitol acetate, 6.8 parts of dibutyl phthalate, diethylene glycol 12.7 parts of butyl ether acetate, 11.3 parts of tripropylene glycol monomethyl ether, and 10.9 parts of dodecyl alcohol ester. Disperse the above raw materials at a high speed and heat and dissolve at 80°C for 80 minutes. The specific time is subject to the clarity of the solution.

[0029] (3) Silver powder: the purity of flake silver powder is greater ...

Embodiment 2

[0041] (1) Preparation of glass powder: Weighing: SiO 2 21.5 parts, Al 2 o 3 7.1 parts, TeO 2 12.2 parts, ZnO 22.5 parts, Bi 2 o 3 28.5 copies, WO 3 8.2 servings. After mixing the above materials evenly, preheat at 700°C for 18 minutes, then melt at 1250°C for 1 hour, quench with deionized water and dry, then ball mill for 22 hours, and the average particle size is less than 5 microns after sieving and drying glass powder.

[0042] (2) Preparation of organic system: weigh: 18.3 parts of ethyl cellulose, 5.6 parts of polyvinyl butyral, 28 parts of butyl carbitol acetate, 13.2 parts of dibutyl phthalate, diethylene glycol 11.3 parts of butyl ether acetate, 15.7 parts of tripropylene glycol monomethyl ether, and 7.9 parts of dodecyl alcohol ester. After dispersing the above raw materials at high speed, heat and dissolve at 100°C for 120 minutes. The specific time is subject to the clarity of the solution.

[0043] (3) Silver powder: the purity of flake silver powder ...

Embodiment 3

[0055] (1) Preparation of glass powder: Weighing: SiO 2 10 copies, Al 2 o 3 5 parts, TeO 2 25 parts, ZnO 40 parts, Bi 2 o 3 20 copies, WO 3 5 servings. After mixing the above materials evenly, preheat at 800°C for 20 minutes, then melt at 1300°C for 1 hour, quench with deionized water and dry, then ball mill for 24 hours, and the average particle size is less than 5 microns after sieving and drying glass powder.

[0056] (2) Preparation of organic system: Weighing: 15 parts of ethyl cellulose, 5 parts of polyvinyl butyral, 60 parts of butyl carbitol acetate, 15 parts of dibutyl phthalate, diethylene glycol 25 parts of butyl ether acetate, 20 parts of tripropylene glycol monomethyl ether, and 5 parts of dodecyl alcohol ester. Disperse the above raw materials at a high speed and heat and dissolve at 120°C for 240 minutes. The specific time is subject to the clarity of the solution.

[0057] (3) Silver powder: the purity of flake silver powder is greater than 99.90%,...

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Abstract

The invention belongs to the technical field of a photovoltaic material of a solar cell, and particularly relates to high-back-electrode-tension and hidden-crack-preventing back passivation silver paste of a PERC crystalline silicon solar cell and a preparation method of the silver paste. The preparation method specifically comprises the steps of performing uniform mixing on silver powder, glass powder, an organic binder and auxiliaries, and then performing dispersing and grinding on a three-high mill until the powder size is less than 10 microns to obtain the back surface silver paste of thecrystalline silicon solar cell. The back passivation silver paste has excellent printing performance; after the silver paste is sintered at the peak value temperature of 780-810 DEG C for 1-2s, the silver paste and a silicon substrate can form high ohmic contact, and can be matched with aluminum paste of multiple models, so that the photoelectric conversion efficiency is improved obviously; the silver paste has strong welding performance, the aging adhesive force can reach 5N or above, and the silicon layer falling-off area can be less than 5%, so that the service life of the solar cell can beprolonged effectively; and after the silver paste is subjected to dual-85 test, the efficiency (P<mpp>) attenuation degree is less than 5%.

Description

technical field [0001] The invention relates to the technical field of solar cell photovoltaic materials, specifically a PERC crystalline silicon solar cell back passivation silver paste with good welding performance, strong adhesion, excellent aging resistance, anti-cracking, high back tension and anti-cracking and its preparation method. Background technique [0002] With the rapid development of human society, non-renewable energy sources such as oil, coal, and natural gas are becoming increasingly exhausted. In order to solve the energy problem, the development and utilization of renewable energy are receiving global attention. As an important part of renewable energy, solar energy is not only a clean energy, but also has the advantages of wide distribution, huge energy, and convenient utilization. Therefore, solar energy is called by many scientists as an alternative energy source to fossil energy. Solar crystalline silicon photovoltaic power generation system is a n...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01B1/16H01B13/00H01L31/0224B82Y30/00
CPCB82Y30/00H01B1/16H01B13/00H01L31/022441Y02E10/50
Inventor 杨锐昌杨华
Owner HANGZHOU RIGHTSILVER ELECTRONICS MATERIAL
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