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High-dispersion silver powder and solar battery electrode conductive silver paste

A solar cell, highly dispersed technology, applied in the direction of circuits, electrical components, semiconductor devices, etc., can solve the problems of increasing the energy consumption of solar cells, silver powder is difficult to disperse, easy to gather, etc., and achieve the effect of reducing the percolation value

Inactive Publication Date: 2011-08-03
中科广化(重庆)新材料研究院有限公司 +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

(2) Dispersion of silver powder: In solar cell electrodes, silver powder is difficult to disperse due to the different chemical properties of the other two components of silver powder
②When silver powder is applied to solar cells, it generally needs to undergo high-temperature sintering (600°C to 900°C) to melt the silver powder to form a conductive network. The performance will be affected, especially the thin-film solar cells developed in recent years are not resistant to high temperature
③Silver powder for solar cells has small particle size and high surface activation energy, so it is easy to aggregate and difficult to disperse
At present, the dispersibility of silver powder used in solar cell electrode conductive silver paste has not attracted enough attention in China.

Method used

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  • High-dispersion silver powder and solar battery electrode conductive silver paste
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  • High-dispersion silver powder and solar battery electrode conductive silver paste

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0081] Preparation of Highly Dispersed Silver Powder

[0082] Under anhydrous and oxygen-free conditions, add mercaptododecanol to 20ml of dichloromethane and triethylamine, and add dibromoisovaleryl bromide under stirring at 15°C, wherein triethylamine, dibromoisovaleryl bromide The molar ratio of bromine to mercaptododecanol is 1.5:2:1, stirred and reacted at 0°C for 24 hours, then stopped the reaction, added 20ml of water, extracted the reaction product with toluene, and then used saturated chlorinated The product was washed with ammonium solution for 4 times, then dried with anhydrous magnesium sulfate or anhydrous sodium sulfate, and then vacuum-dried to obtain ATRP initiator A containing mercapto groups.

[0083] According to the acylation reaction that takes place between dibromoisovaleryl bromide and mercaptododecanol, the structural formula of initiator A can be obtained as follows:

[0084]

[0085] where n=2; b=11.

[0086] Get linear nano-silver powder (d=60 ±...

Embodiment 2

[0093] Preparation of Highly Dispersed Silver Powder

[0094] Under anhydrous and oxygen-free conditions, add mercaptoethanol to 20ml of chloroform and triethylamine, and add dibromoisobutyryl bromide under stirring at 25°C, wherein triethylamine, dibromoisobutyryl bromide and mercapto The molar ratio of ethanol is 2: 2: 1, stir and react at 8°C for 16 hours, then stop the reaction, add 20ml of water, then extract the product of the reaction with toluene, then wash the product 4 times with saturated ammonium chloride solution , then dried with anhydrous magnesium sulfate or anhydrous sodium sulfate, and then vacuum-dried to obtain ATRP initiator B containing mercapto groups.

[0095] According to the acylation reaction that takes place between dibromoisobutyryl bromide and mercaptoethanol, the initiator structural formula of ATRP initiator B can be obtained as follows:

[0096]

[0097] where b=12

[0098] Get rod-shaped nanometer silver powder (d=100 ± 15nm, L=15000 ± 65...

Embodiment 3

[0105] Preparation of Highly Dispersed Silver Powder

[0106] Under anhydrous and oxygen-free conditions, add mercaptooctaol to 20ml of toluene and amphetamine, and add 2-bromopropionyl bromide under stirring at 35°C, wherein amphetamine, 2-bromopropionyl bromide and mercapto octal The molar ratio of alcohol is 1: 2.5: 1, stirred and reacted at 16°C for 8 hours, then stopped the reaction, added 20ml of water, extracted the product of the reaction with toluene, and washed 4 times with saturated ammonium chloride solution , then dried with anhydrous magnesium sulfate or anhydrous sodium sulfate, and then vacuum-dried to obtain ATRP initiator C containing mercapto groups.

[0107] According to the acylation reaction that takes place between 2-bromopropionyl bromide and mercaptooctaol, the initiator structural formula of ATRP initiator C can be obtained as follows:

[0108]

[0109] Get dendritic nano-silver powder (d=40 ± 15nm, L=1000 ± 50nm) and join in 50g ether, then add i...

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Abstract

The invention discloses high-dispersion silver powder and solar battery electrode conductive silver paste, wherein the conductive silver paste is prepared from the following components in mass percentage: 53-61.8% of high-dispersion silver powder in claim 1, 21.5-31% of glass cement and 15-17.6% of organic carrier. The high-dispersion silver powder provided by the invention has very good dispersity and by means of the conductive silver paste prepared by the high-dispersion silver powder, the usage amount of the silver powder is reduced and the conductive efficiency is improved in the mean time; in addition, the conductive silver paste provided by the invention is clean and environmental-friendly and is suitable for popularization and application. By means of the high-dispersion silver powder and the solar battery electrode conductive silver paste which are provided by the invention, the defects of poor dispersity of the conventional silver powder and large usage amount of the silver powder of the conventional conductive silver paste are overcome.

Description

technical field [0001] The invention belongs to the field of photovoltaic power generation materials, and in particular relates to a highly dispersed silver powder and a conductive silver paste for solar cell electrodes. Background technique [0002] At present, the actual development of wind energy, geothermal energy and water energy resources in the world is far from meeting human needs for energy, while solar energy resources are one of the most abundant renewable energy sources, which are widely distributed, renewable, and do not pollute the environment. It is an internationally recognized ideal alternative energy source. Therefore, the corresponding solar cell industry has great development potential and has become an emerging sunrise industry. [0003] The development of new energy industrialization in China started relatively late, but the speed of development is relatively strong. my country's photovoltaic power generation industry started in the 1970s and has deve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/00H01L31/0224
Inventor 胡继文邹海良李银辉刘锋肖定书胡美龙
Owner 中科广化(重庆)新材料研究院有限公司
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