Front silver paste for silicon solar cells and preparation method thereof

A technology of silicon solar cells and silver paste, which is applied in the manufacture of cables/conductors, conductive materials dispersed in non-conductive inorganic materials, circuits, etc., can solve the problem of high photoelectric conversion efficiency, failure to reach solar cells, and low photoelectric conversion efficiency And other issues

Inactive Publication Date: 2012-04-25
IRICO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the photoelectric conversion efficiency of the solar cells prepared by the current technology has improved compared with the initial stage of research

Method used

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  • Front silver paste for silicon solar cells and preparation method thereof
  • Front silver paste for silicon solar cells and preparation method thereof
  • Front silver paste for silicon solar cells and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A front silver paste for silicon solar cells, composed of:

[0018]

[0019] The glass powder is Bi 2 o 3 -B 2 o 3 -ZnO system glass powder, the particle diameter of glass powder is 2-6 microns, the particle diameter of flake powder silver powder is 4-6 microns, the particle diameter of spherical silver powder is 2-4 microns, and the particle diameter of silver micropowder is 50-100 nanometers .

[0020] First prepare the organic carrier, put 20% ethyl cellulose and 80% terpineol into the reaction kettle, heat to 70°C with a water bath, and stir with an electric mixer at a stirring speed of 100 rpm. After that, the temperature was kept constant for 4 hours until the resin ethyl cellulose in the reaction kettle was completely dissolved, and each component was in a homogeneous phase. After cooling, filter through a 300-mesh screen to obtain an organic vehicle.

[0021] The components of the silver paste were weighed according to the above proportions, mixed with ...

Embodiment 2

[0023] A front silver paste for silicon solar cells, composed of:

[0024]

[0025] The glass powder is Bi 2 o 3 -B 2 o 3 -ZnO system glass powder, the particle diameter of glass powder is 2-6 microns, the particle diameter of flake powder silver powder is 4-6 microns, the particle diameter of spherical silver powder is 2-4 microns, and the particle diameter of silver micropowder is 50-100 nanometers .

[0026] First prepare the organic carrier, put 10% ethyl cellulose and 90% terpineol into the reaction kettle, heat to 80°C in a water bath, and stir with an electric mixer at a stirring speed of 200 rpm. After that, the temperature was kept constant for 5 hours until the resin in the reactor was completely dissolved and each component was in a homogeneous phase. After cooling, filter through a 300-mesh screen to obtain an organic vehicle.

[0027] The components of the silver paste were weighed according to the proportions mentioned above, mixed with a defoaming mixer...

Embodiment 3

[0029] A front silver paste for silicon solar cells, composed of:

[0030]

[0031] The glass powder is Bi 2 o 3 -B 2 o 3 -ZnO system glass powder, the particle diameter of glass powder is 2-6 microns, the particle diameter of flake powder silver powder is 4-6 microns, the particle diameter of spherical silver powder is 2-4 microns, and the particle diameter of silver micropowder is 50-100 nanometers .

[0032] First prepare the organic carrier, put 25% ethyl cellulose and 75% terpineol into the reaction kettle, heat to 70°C with a water bath, and stir with an electric mixer at a stirring speed of 100 rpm. After that, the temperature was kept constant for 4 hours until the resin in the reactor was completely dissolved and each component was in a homogeneous phase. After cooling, filter through a 300-mesh screen to obtain an organic vehicle.

[0033] The components of the silver paste were weighed according to the above proportions, mixed with a defoaming mixer, rolled...

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Abstract

The invention relates to front silver paste for silicon solar cells and a preparation method thereof. The silver paste is characterized by comprising the following components by weight percent: 6-15% of organic carrier, 1-5% of binders, 2-6% of solvents, 0.5-5% of auxiliaries, 0.1-2% of additives and the balance of conductive silver powder. The invention relates to conductive paste for front electrodes of silicon solar cells. The paste comprises conductive silver powder, an organic carrier, binders, solvents and auxiliaries. The paste also comprises additives selected from one or more of phosphorus trichloride, red phosphorus and tributyl phosphate. The additives in the conductive paste can conduce to improvement of the conductivity of the conductive paste, therefore the finally prepared solar cells have higher photoelectric conversion efficiency.

Description

technical field [0001] The invention relates to a silicon solar cell front silver paste and a preparation method thereof. Background technique [0002] As a kind of green energy, solar energy has attracted more and more attention due to its advantages of inexhaustibility, no pollution, and no limitation of geographical resources. A solar cell is a semiconductor device that can convert solar energy into electrical energy. Under the condition of light, a photogenerated current will be generated inside the solar cell, and the electrical energy can be directly output through the electrodes. The front electrode of the silicon substrate of a monocrystalline silicon solar cell is the negative electrode, and the back electrode is the positive electrode. Both the front electrode and the back electrode of the solar cell are coated with conductive paste. [0003] The conductive paste on the front side of the solar cell is usually a conductive silver paste printed into a 0.08 mm wide ...

Claims

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Application Information

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IPC IPC(8): H01B1/22H01B13/00H01L31/0224
Inventor 朱万超
Owner IRICO
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