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Technological process for preparing silver paste for organic fluorine-doped solar cell by hydrothermal method

The invention relates to a technology for solar cells and a process method, which is applied in the field of silver paste for the front of organic fluorine-doped silicon solar cells and its process field, and can solve the problems of low degree of localization of special raw materials, low performance of materials and components, and unfavorable development of photovoltaic industry. , to achieve the effect of good appearance printing quality, excellent solderability and dense structure

Active Publication Date: 2012-12-19
YUNNAN INFINE NEO MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The screen printing method has been used as a method for industrial production of solar cell electrodes due to its high efficiency, low cost, and simple and durable equipment. Resistance Rs, open circuit voltage Uoc, filling FF, and conversion efficiency Eta have a great influence
In recent years, my country's photovoltaic industry has developed rapidly, and the industrial scale and technical level have been improved accordingly. However, the degree of localization of special raw materials is not high, and the varieties are not complete. The performance of materials and components that have been localized is low. Among them, the photovoltaic silver paste market is basically dominated Dupont, Ferro, Heraeus and other foreign manufacturers occupy it, which greatly increases the production cost and is not conducive to the development of the photovoltaic industry
In addition, glass systems such as boron-silicon-lead-aluminum and bismuth-silicon-lead are currently used in the market, and their common feature is that they contain lead, which is not conducive to environmental protection. Lead paste is bound to be restricted in subsequent mass production and then eliminated

Method used

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  • Technological process for preparing silver paste for organic fluorine-doped solar cell by hydrothermal method
  • Technological process for preparing silver paste for organic fluorine-doped solar cell by hydrothermal method
  • Technological process for preparing silver paste for organic fluorine-doped solar cell by hydrothermal method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A. AgNO 3 Add 586.31g into 2L of deionized water to make a silver nitrate solution, then add 241.97g of KOH into 2L of deionized water to make a potassium hydroxide solution, then slowly add the silver nitrate solution into the potassium hydroxide solution, and stir for 1 hour. Dry at 100°C for 5 hours to prepare Ag ２ O 400g powder;

[0033] B. Polyperfluoroethylene propylene (FEP) emulsion, 1.9wt%; tetrafluoroethylene and perfluoron-propyl vinyl ether copolymer (PFA) emulsion, 3.9wt%; Ag ２ O powder, 84wt%; NH 4 VO 3 , 2.6wt%; H 3 PO 4 (80%), 3.2wt%; Ni(NO 3 ) 2 ·6H 2 O, 2.7wt%; Zr(NO 3 ) 4 ·5H 2 O, 1.7wt% is mixed and packed into a planetary ball mill, while adding 800ml of deionized water and 1000g zirconia balls, at 280rpm of rotation and 180rpm of revolution, the planetary ball mill was mixed for 6 hours to obtain a mixed emulsion;

[0034] C. Put the ball-milled mixed emulsion into a 2L autoclave, add 120g of diisopropylamine, 20g of polyvinylpyrrolido...

Embodiment 2

[0039] A. AgNO 3 Add 586.31g into 2L of deionized water to make a silver nitrate solution, then add 241.97g of KOH into 2L of deionized water to make a potassium hydroxide solution, then slowly add the silver nitrate solution into the potassium hydroxide solution, and stir for 1 hour. Dry at 110°C for 5 hours to prepare Ag ２ O powder;

[0040] B. Polyperfluoroethylene propylene (FEP) emulsion, 2.9wt%; tetrafluoroethylene and perfluoron-propyl vinyl ether copolymer (PFA) emulsion, 4.3wt%; Ag ２ O powder, 82wt%; NH 4 VO 3 , 1.9wt%; H 3 PO 4 (80%), 3.8wt%; Ni(NO 3 ) 2 ·6H 2 O, 2.3wt%; Zr(NO 3 ) 4 ·5H 2 O, 2.8wt% are mixed and packed into planetary ball mill, add the deionized water of 800ml and 1000g zirconia ball simultaneously, under rotation 240rpm, revolution 120rpm, planetary ball mill got mixed emulsion for 6 hours;

[0041] C. Put the mixed emulsion after ball milling into a 2L autoclave, then add 150g of diisopropylamine and 200ml of diethanolamine, then raise...

Embodiment 3

[0046] A. AgNO 3 Add 586.31g into 2L of deionized water to make a silver nitrate solution, then add 241.97g of KOH into 2L of deionized water to make a potassium hydroxide solution, then slowly add the silver nitrate solution into the potassium hydroxide solution, and stir for 1 hour. Dry at 110°C for 4 hours to prepare Ag ２ O powder;

[0047] B. Polyperfluoroethylene propylene (FEP) emulsion, 1.4wt%; tetrafluoroethylene and perfluoron-propyl vinyl ether copolymer (PFA) emulsion; 3.9wt%, Ag ２ O powder, 81%wt%; NH 4 VO 3 , 2.5wt%; H 3 PO 4 (80%), 3.7wt%; Ni(NO 3 ) 2 ·6H 2 O, 2.1wt%; Zr(NO 3 ) 4 ·5H 2 O, 2.6wt%; Zn(NO 3 ) 2 ·6H 2 O, 2.8wt% are mixed and packed into a planetary ball mill, while adding 800ml of deionized water and 1000g zirconia balls, at 160rpm of rotation and 180rpm of revolution, the planetary ball mill was mixed for 8 hours to obtain a mixed emulsion;

[0048] C. Put the mixed emulsion after ball milling into a high-pressure reactor with a capa...

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Abstract

The invention relates to a technological process for preparing silver past for organic fluorine-doped solar cell by hydrothermal method, comprising the steps as follows: silver nitrate reacts with potassium hydroxide to prepare Ag2O; Ag2O and poly(fluorinated ethylene-propylene) emulsion, polytetrafluoroethylene (PFA) emulsion, phosphoric acid, ammonium metavanadate, nitrates or acetates of Ba, Ni, Zr and Zn are ball milled to obtain a mixed emulsion; the mixed emulsion is filled into a high pressure reactor, and a molecular guide agent and a reducing agent are then added for hydrothermal reaction; the mixed emulsion after the hydrothermal reaction is taken out of the high pressure reactor, filtered, washed with deionized water and absolute ethyl alcohol, and dried in vacuum, thus obtaining fluorine-containing high-molecular coated silver powder particles; the silver powder particles and an organic binder are mixed and ground, and a silver paste having a solid content of 79-90% is obtained. The prepared silver paste has no lead or cadmium, in accordance with the requirements of environment protection; and a fluoride in the paste can etch a silicon nitride layer such that a silver wire is in excellent ohmic contact with a N type layer, the paste is used in grid line electrodes, the print quality is superior, the serial resistance is effectively reduced, the adhesive force is strong and the solderability is excellent.

Description

technical field [0001] The invention relates to a silver paste for a silicon solar cell and a preparation method thereof, in particular to a silver paste for the front surface of an organic fluorine-doped silicon solar cell prepared by a hydrothermal method and a process thereof, belonging to the technical field of solar cells. Background technique [0002] Fossil energy (coal, oil, natural gas) is the main body of the current global energy consumption structure. With the continuous exploitation of human beings, the depletion of fossil energy is inevitable. In addition, the use of fossil energy will produce a large amount of greenhouse gas CO 2 , leading to global warming, melting of polar glaciers, rising sea levels and other increasingly serious environmental problems. Therefore, the development of non-polluting renewable energy such as solar energy, wind energy, geothermal energy, and water energy will definitely become the future development direction, and only solar e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01B13/00H01B1/22H01L31/0224
Inventor 周涛赵蜀春
Owner YUNNAN INFINE NEO MATERIAL