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High-conductivity low-shrinkage-rate front electrode silver paste for solar cell and preparation method for silver paste

A solar cell, low shrinkage technology, applied in conductive materials dispersed in non-conductive inorganic materials, cable/conductor manufacturing, circuits, etc., can solve the problems of high shrinkage of silver paste, long use time, easy peeling, etc. Achieve the effects of low product scrap rate, less risk of false welding, and less environmental pollution

Inactive Publication Date: 2018-11-06
SUZHOU DOUBLE GOLD IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The performance of the lead-free paste of the present invention has basically reached the performance of the lead-containing paste. The paste has good thixotropy, but the shrinkage rate of the silver paste is high, and it is easy to peel off, and the use time is long and it is easy to damage

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The front electrode silver paste with high conductivity and low shrinkage for solar cells comprises the following components in parts by weight: 30 parts of 100-mesh nano-silver particles, 5 parts of silver molybdate, 1 part of sodium oxide, 5 parts of foamed aluminum, carbonic acid 5 parts of sodium, 5 parts of manganese dioxide, 2 parts of zinc oxide, 2 parts of barium oxide, 22 parts of terpineol, 2 parts of hydrogenated castor oil, 5 parts of citric acid, 1 part of lead-free glass powder, modified lauryl alcohol 6 parts of vinyl ether; the modified polyoxyethylene lauryl ether is mixed by silicon dioxide, polyoxyethylene lauryl ether and chitosan, and the molar ratio is 5:2:1; the pores of the aluminum foam The rate is 25%.

[0024] Wherein, the lead-free glass powder includes the following components by mass fraction: bismuth oxide 45%, tin oxide 15%, and silicon dioxide as the balance.

[0025] The preparation method of the front electrode silver paste with high ...

Embodiment 2

[0033] The front electrode silver paste with high conductivity and low shrinkage for solar cells comprises the following components in parts by weight: 45 parts of nano-silver particles with a particle size of 150 mesh, 6 parts of silver molybdate, 4 parts of sodium oxide, and 10 parts of aluminum foam 8 parts of sodium carbonate, 7 parts of manganese dioxide, 6 parts of zinc oxide, 3 parts of barium oxide, 25 parts of terpineol, 4 parts of hydrogenated castor oil, 10 parts of citric acid, 6 parts of lead-free glass powder, modified laurel 7 parts of alcohol polyoxyethylene ether; the modified polyoxyethylene lauryl ether is mixed by silicon dioxide, polyoxyethylene lauryl ether and chitosan, and the molar ratio is 7:5:1; the foam Aluminum has a porosity of 30%.

[0034] Wherein, the lead-free glass powder includes the following components by mass fraction: bismuth oxide 55%, tin oxide 18%, and silicon dioxide as the balance.

[0035] The preparation method of the front elect...

Embodiment 3

[0043] The front electrode silver paste with high conductivity and low shrinkage for solar cells comprises the following components in parts by weight: 50 parts of 200-mesh nano-silver particles, 8 parts of silver molybdate, 5 parts of sodium oxide, 12 parts of foamed aluminum, carbonic acid 12 parts of sodium, 10 parts of manganese dioxide, 8 parts of zinc oxide, 5 parts of barium oxide, 28 parts of terpineol, 5 parts of hydrogenated castor oil, 12 parts of citric acid, 8 parts of lead-free glass powder, modified lauryl polyoxygen 8 parts of vinyl ethers; the modified polyoxyethylene lauryl ether is mixed by silicon dioxide, polyoxyethylene lauryl ether and chitosan, and the molar ratio is 8: 6: 1; the porosity of the foamed aluminum 35%.

[0044] Wherein, the lead-free glass powder includes the following components by mass fraction: 58% bismuth oxide, 22% tin oxide, and the balance is silicon dioxide.

[0045] The preparation method of the front electrode silver paste with hi...

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Abstract

The invention discloses high-conductivity low-shrinkage-rate front electrode silver paste for a solar cell and a preparation method for the silver paste. The front electrode silver paste comprises thefollowing components: nano-silver particles, silver molybdate, sodium oxide, foamed aluminum, sodium carbonate, manganese dioxide, zinc oxide, barium oxide, terpineol, hydrogenated castor oil, citricacid, lead-free glass powder and modified lauryl polyoxyethylene ether, wherein the modified lauryl polyoxyethylene ether is prepared by mixing silicon dioxide, lauryl polyoxyethylene ether and chitosan; and the porosity of the foamed aluminum is 25-35%. The lauryl polyoxyethylene ether is subjected to modification treatment, so that the conductivity of the silver paste is improved. The low-porosity foamed aluminum is mixed with other components, so that the shrinkage rate of the obtained silver paste is reduced, the compatibility between the front electrode silver paste and a base material is improved, the adhesive force is high, the environmental pollution is small, the shrinkage rate in high-temperature curing is low, the false welding is not easy to cause, and the product rejection rate is low.

Description

technical field [0001] The invention relates to the technical field of silver paste, in particular to a front electrode silver paste with high conductivity and low shrinkage rate for solar cells and a preparation method thereof. Background technique [0002] The depletion of traditional energy sources and the increasingly severe environmental pollution caused by them have become more and more prominent. The use of solar power to generate electricity has made great progress in recent years. Solar photovoltaic cells convert solar energy into electrical energy through the photoelectric effect. The silver paste of the front electrode of the solar cell is one of the main raw materials that affect the electrical performance of the solar cell. The front silver paste is mainly composed of three parts: conductive phase, organic phase and inorganic phase. The guiding phase is a metal powder that conducts electricity, and silver micropowder with the best conductivity is generally use...

Claims

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Application Information

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IPC IPC(8): H01B1/16H01B1/22H01B13/00H01L31/0224
CPCH01B1/16H01B1/22H01B13/00H01L31/022425
Inventor 时金明崔斌
Owner SUZHOU DOUBLE GOLD IND
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