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Solar cell conductive paste and preparation method thereof

A technology for solar cells and conductive paste, which is used in the manufacture of cables/conductors, conductive materials dispersed in non-conductive inorganic materials, circuits, etc. Stability and other issues, to achieve the effects of excellent performance, good stability and low warpage

Inactive Publication Date: 2016-11-09
王泽陆
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the large difference between the thermal expansion coefficients of aluminum and silicon, the battery sheet is bent during the later sintering process, which affects the overall electrical performance of the battery. Battery stability, in addition, with the development of solar cell technology, higher requirements are placed on battery performance
So far, although people have made a lot of research on improving the various properties of aluminum-backed conductive pastes, it is still impossible to obtain conductive pastes with excellent comprehensive properties to meet the continuously developing technical needs.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A solar cell conductive paste, comprising the following components in parts by weight: 30 parts of aluminum powder, 14 parts of aluminum oxide powder, 1 part of bismuth-silver alloy powder, 2 parts of indium chloride, 5 parts of glass powder, and 2 parts of D318 resin 1 part, 2 parts of polyethylene glycol oleate, 1 part of N-methyl-4-cyanobenzylamine, 1 part of laminarin, 3 parts of hexamethyldisilazane, 2,4-difluoro-5- 2 parts of formyl benzonitrile, 2 parts of zinc methacrylate, 3 parts of ricinoleamide, 4 parts of dimethyl behenyl tertiary amine, 3 parts of sorbitan monopalmitate, 12 parts of N-methylpyrrolidone, carboxylate 17 parts of must alcohol;

[0023] The glass powder is prepared from the following components in parts by weight: 8 parts of boron oxide, 6 parts of silicon dioxide, 2 parts of pozzolan powder, 3 parts of silicon carbide, 2 parts of feldspar powder, 4 parts of phosphorus trioxide, samarium sulfate 3 parts, 0.5 parts of gallium oxide, 0.8 parts ...

Embodiment 2

[0031] A solar cell conductive paste, comprising the following components in parts by weight: 48 parts of aluminum powder, 25 parts of aluminum oxide powder, 9 parts of bismuth-silver alloy powder, 7 parts of indium chloride, 11 parts of glass powder, and 7 parts of D318 resin 5 parts, 5 parts of polyethylene glycol oleate, 4 parts of N-methyl-4-cyanobenzylamine, 3 parts of laminarin, 6 parts of hexamethyldisilazane, 2,4-difluoro-5- 6 parts of formyl benzonitrile, 5 parts of zinc methacrylate, 6 parts of ricinoleamide, 9 parts of dimethyl behenyl tertiary amine, 8 parts of sorbitan monopalmitate, 20 parts of N-methylpyrrolidone, carboxylate 26 parts of must alcohol;

[0032] The glass powder is prepared from the following components in parts by weight: 16 parts of boron oxide, 11 parts of silicon dioxide, 7 parts of pozzolan powder, 7 parts of silicon carbide, 6 parts of feldspar powder, 9 parts of phosphorus trioxide, samarium sulfate 8 parts, gallium oxide 2 parts, bismuth ...

Embodiment 3

[0040] A solar cell conductive paste, comprising the following components in parts by weight: 32 parts of aluminum powder, 16 parts of aluminum oxide powder, 3 parts of bismuth-silver alloy powder, 2.5 parts of indium chloride, 5.5 parts of glass powder, 2.3 parts of D318 resin 2.2 parts of polyethylene glycol oleate, 1.5 parts of N-methyl-4-cyanobenzylamine, 1.3 parts of laminarin, 3.2 parts of hexamethyldisilazane, 2,4-difluoro-5- 2.8 parts of formyl benzonitrile, 2.1 parts of zinc methacrylate, 3.8 parts of ricinoleamide, 5.3 parts of dimethyl behenyl tertiary amine, 3.6 parts of sorbitan monopalmitate, 14 parts of N-methylpyrrolidone, carboxylate 19 parts of must alcohol;

[0041] The glass powder is prepared from the following components in parts by weight: 8.6 parts of boron oxide, 6.5 parts of silicon dioxide, 2.8 parts of pozzolan powder, 3.5 parts of silicon carbide, 2.7 parts of feldspar powder, 4.5 parts of phosphorus trioxide, samarium sulfate 3.6 parts, 0.7 parts...

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Abstract

The invention discloses a solar cell conductive paste and a preparation method thereof. The conductive paste contains the following components: aluminum powder, aluminum oxide powder, bismuth silver alloy powder, indium chloride, glass powder, D318 resin, polyethylene glycol oleate, 4-(methylaminomethyl)benzonitrile, laminarin, hexamethyldisilazane, 2,4-difluoro-5-formyl benzonitrile, zinc methacrylate, ricinoleamide, dimethyl behenic tertiary amine, sorbitan monopalmitate, 1-methyl-2-pyrrolidinone, and carbitol. The viscosity of the conductive paste prepared by the invention is 27-31 Pa*S. After the conductive paste is sintered, the appearance is smooth and has no blisters. The adhesion force is 50.3N / cm or more. The sintered solar cell conductive paste is not easy to fall off, and has good stability. At the same time the curvature is less than 0.6mm, and the warpage is low. A square resistance value of a sintered conductive film is low. Each performance is good and the reliability is good. The solar cell conductive paste of the invention is appropriate as the solar cell conductive paste and has a very broad application prospect.

Description

technical field [0001] The invention belongs to the field of electronic materials, and in particular relates to a solar cell conductive paste and a preparation method thereof. Background technique [0002] As a renewable green energy, solar energy has attracted more and more attention due to its advantages of abundant resources, inexhaustible, clean and non-polluting, and not limited by geographical resources, and has become the basis of the future energy structure. A solar cell usually consists of a p-type silicon substrate, an n-type layer, an anti-reflection film, a front electrode, and a negative electrode. Wherein, the front electrode and the back electrode are formed by screen printing the conductive paste on the anti-reflection film and the silicon substrate respectively. The conductive paste used for the back electrode can be divided into back aluminum conductive paste and back silver conductive paste. Aluminum back conductive paste is composed of aluminum powder, ...

Claims

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Application Information

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IPC IPC(8): H01B1/22H01L31/0224H01B13/00
CPCH01B1/22H01B13/00H01L31/022425Y02E10/50
Inventor 王泽陆
Owner 王泽陆
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