A silver conductive paste for solar cell and a preparation method thereof

A technology for solar cells and conductive paste, applied in the field of solar energy, can solve problems such as affecting the production cost of solar cells, and achieve the effects of good appearance, high welding strength, and reduced volatility

Inactive Publication Date: 2019-01-15
安徽兆拓新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition to these performance parameters, the cost of solar cell back silver paste also seriously affects the production cost of solar cells

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The silver conductive paste for solar cells of this embodiment contains conductive silver powder, inorganic glass powder, organic carrier, and nano-zinc in the silver conductive paste for solar cells;

[0033] Based on 100 parts by weight of the silver conductive paste for solar cells, 45 parts of the conductive silver powder, 2 parts of inorganic glass powder, 35 parts of organic carriers, and 0.3 parts of nano-zinc;

[0034] The conductive silver powder is a mixture of two silver powders with a particle size of 1-5 μm and 20-40 μm, the silver powder with a particle size of 1-5 μm is a spherical silver powder, and the silver powder with a particle size of 20-40 μm is a flake silver powder with a particle size of The weight ratio of 1-5μm silver powder to 20-40μm silver powder is 1:1.2.

[0035] Wherein, the inorganic glass powder comprises the following raw materials in parts by weight: 55 parts of PbO, SiO 2 3 copies, B 2 o 3 2 parts, TeO 2 15 parts, Al 2 o 3 ...

Embodiment 2

[0050] The silver conductive paste for solar cells of this embodiment contains conductive silver powder, inorganic glass powder, organic carrier, and nano-zinc in the silver conductive paste for solar cells;

[0051] Based on 100 parts by weight of the silver conductive paste for solar cells, 65 parts of the conductive silver powder, 7 parts of inorganic glass powder, 45 parts of organic carriers, and 0.7 parts of nano-zinc;

[0052] The conductive silver powder is a mixture of two silver powders with a particle size of 1-5 μm and 20-40 μm, the silver powder with a particle size of 1-5 μm is a spherical silver powder, and the silver powder with a particle size of 20-40 μm is a flake silver powder with a particle size of The weight ratio of 1-5μm silver powder to 20-40μm silver powder is 1:1.6.

[0053] Wherein, the inorganic glass powder comprises the following raw materials in parts by weight: 65 parts of PbO, SiO 2 8 copies, B 2 o 3 6 parts, TeO 2 25 parts, Al 2 o 3 ...

Embodiment 3

[0068] The silver conductive paste for solar cells of this embodiment contains conductive silver powder, inorganic glass powder, organic carrier, and nano-zinc in the silver conductive paste for solar cells;

[0069] Based on 100 parts by weight of the silver conductive paste for solar cells, 55 parts of the conductive silver powder, 4.5 parts of inorganic glass powder, 40 parts of organic carrier, 0.5 part of nano-zinc;

[0070] The conductive silver powder is a mixture of two silver powders with a particle size of 1-5 μm and 20-40 μm, the silver powder with a particle size of 1-5 μm is a spherical silver powder, and the silver powder with a particle size of 20-40 μm is a flake silver powder with a particle size of The weight ratio of 1-5μm silver powder to 20-40μm silver powder is 1:1.4.

[0071] Wherein, the inorganic glass powder comprises the following raw materials in parts by weight: 60 parts of PbO, SiO 2 5.5 copies, B 2 o 3 4 parts, TeO 2 20 copies, Al 2 o 3 ...

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Abstract

The invention relates to the technical field of solar energy, in particular to a silver conductive paste for solar cell and a preparation method thereof, wherein the silver conductive paste for solarcell comprises conductive silver powder, inorganic glass powder, organic carrier and nanometer zinc; Based on 100 parts by weight of the silver conductive paste for solar cells, the conductive silverpowder 45- 65 part, inorganic glass powder 2- 7 part, organic carrier 35- 45 part, nanometer zinc 0.3- 0.7 part; The conductive silver powder is prepared from two kinds of conductive silver powder with particle size of 1- 5 u m and 20 u m- 40 u m silver powder mixture with a particle size of 1- 5 u m silver powder is spherical silver powder with a particle size of 20-40um silver powder is flake silver powder, and the weight ratio of particle size is 1- 5 u m silver powder and 20-40 u m. silver powder is 1: 1.2- 1.6. The silver conductive paste of the invention can improve the solar energy conversion efficiency, and the metal film formed after sintering and the silicon substrate are firmly bonded.

Description

technical field [0001] The invention relates to the technical field of solar energy, in particular to a silver conductive paste for solar cells and a preparation method thereof. Background technique [0002] Solar energy is a kind of green energy. People pay more and more attention to it because of its advantages of non-pollution, inexhaustibility, and not limited by geographical resources, so solar cells emerge as the times require. A solar cell is a semiconductor device that can convert solar energy into electrical energy. Under the condition of light, the solar cell will generate current, collect and transmit electricity through grid lines and electrodes. Existing silicon-based solar cells generally prepare electrodes and back field by printing conductive paste containing conductive metal powder, glass powder and organic vehicle on a silicon substrate, drying and firing. The back electrode of the solar cell silicon substrate is generally the positive electrode, and the c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B1/16H01B1/22H01B13/00H01L31/0224
CPCH01B1/16H01B1/22H01B13/00H01L31/022441Y02E10/50
Inventor 陆志鹏
Owner 安徽兆拓新能源科技有限公司
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