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Preparation method of organic binding agent for silicon solar cell aluminum paste

A technology of silicon solar cells and organic adhesives, which is applied in the field of solar cells, can solve the problems of low bonding strength and high square resistance, and achieve the effects of reducing resistivity, improving bonding strength, and small fragmentation rate

Inactive Publication Date: 2015-03-04
WUXI SUNOCEAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The technical problem to be solved by the present invention: the bonding strength of the organic adhesive used on the aluminum paste is not high, and the square resistance is too high. The preparation method is improved, and an organic adhesive for aluminum paste of silicon solar cells is proposed. The preparation method of mixture

Method used

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  • Preparation method of organic binding agent for silicon solar cell aluminum paste
  • Preparation method of organic binding agent for silicon solar cell aluminum paste

Examples

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Effect test

Embodiment 1

[0032] The preparation method of organic binder for silicon solar cell aluminum paste, the steps are as follows:

[0033] Step 1, dissolve 40g of polyol in water, then add 5g of cellulose, 4g of polylactic acid, 3g of isooctyl acrylate, 5g of acrylamide, and 3g of surfactant, stir evenly, and the stirring speed is 700 rpm. The cellulose is hydroxyethyl cellulose, the surfactant is sodium lauryl sulfate, and the polyhydric alcohol is Polyethylene Glycol to obtain the mixture I;

[0034] Step 2, heat up the mixture I, the temperature is 70 ° C, dropwise add 10 g of acrylic acid, 3 g of initiator, keep warm, keep warm time is 2 hours, the initiator is hydrogen peroxide, to obtain the mixture II;

[0035] Step 3, the temperature of the mixture II is lowered, the cooling temperature is 30°C, and then the pH is adjusted to 6.0 to obtain the mixture III, and the pH is adjusted by using a pH regulator, and the pH regulator is selected from hydrochloric acid and ammonia. one or a mixt...

Embodiment 2

[0039] The preparation method of organic binder for silicon solar cell aluminum paste, the steps are as follows:

[0040] Step 1: Dissolve 60g of polyol in water, then add 10g of cellulose, 7g of polylactic acid, 6g of isooctyl acrylate, 10g of acrylamide, and 5g of surfactant, and stir evenly. The stirring speed is 1000 rpm. The cellulose is hydroxyethyl cellulose, the surfactant is sodium lauryl sulfate, and the polyhydric alcohol is Polyethylene Glycol to obtain the mixture I;

[0041] Step 2. Heat up the mixture I, the temperature is 90°C, add 30g of acrylic acid and 6g of initiator dropwise, keep the temperature for 4 hours, the initiator is hydrogen peroxide, and obtain the mixture II;

[0042] Step 3, the temperature of the mixture II is lowered, the cooling temperature is 50°C, and then the pH is adjusted to 8.0 to obtain the mixture III, and the pH is adjusted by a pH regulator, and the pH regulator is selected from hydrochloric acid and ammonia water one or a mixtur...

Embodiment 3

[0046] The preparation method of organic binder for silicon solar cell aluminum paste, the steps are as follows:

[0047] Step 1: Dissolve 50g of polyol in water, then add 7g of cellulose, 6g of polylactic acid, 5g of isooctyl acrylate, 7g of acrylamide, and 4g of surfactant, stir evenly, and the stirring speed is 800 rpm. The cellulose is hydroxyethyl cellulose, the surfactant is sodium lauryl sulfate, and the polyhydric alcohol is Polyethylene Glycol to obtain the mixture I;

[0048] Step 2, heat up the mixture I, the temperature is 80°C, dropwise add 20g of acrylic acid, 5g of the initiator, keep warm, the keep time is 3 hours, the initiator is hydrogen peroxide, to obtain the mixture II;

[0049] Step 3, the temperature of the mixture II is lowered, the cooling temperature is 40°C, and then the pH is adjusted to 7.0 to obtain the mixture III, and the pH is adjusted by using a pH regulator, and the pH regulator is selected from hydrochloric acid and ammonia. one or a mixtu...

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Abstract

The invention relates to a preparation method of an organic binding agent for silicon solar cell aluminum paste, belonging to the technical field of solar cells. The preparation method comprises the following steps: dissolving polyalcohol in water, adding cellulose, polylactic acid, 2-ethylhexyl acrylate, acrylamide and surfactant, and stirring uniformly to obtain a mixture I; heating the mixture I, dropwisely adding acrylic acid and initiator, and keeping the temperature to obtain a mixture II; cooling the mixture II, and regulating the pH value to 6.0-8.0 to obtain a mixture III; and adding diethanolamine and aluminum sol into the mixture III, and stirring uniformly. When being applied to solar cell aluminum paste, the organic binding agent prepared by the method can enhance the binding strength and lower the resistivity, and has low fragment rate especially when the solid content of the aluminum sol is controlled at 20%.

Description

[0001] technical field [0002] The invention relates to a method for preparing an organic binder for silicon solar cell aluminum paste, belonging to the technical field of solar cells. [0003] Background technique [0004] Solar cells are semiconductor devices that can directly convert light energy into electrical energy, and are mainly made of semiconductor materials. Solar cells convert light energy into electrical energy, including the following three processes; 1. Sunlight or other light irradiates the surface of the solar cell. [0005] 2. The semiconductor of the solar cell can absorb photons and excite electron-hole pairs. These electron-hole pairs are separated by the built-in field of the solar cell. The separation conditions: a. There is a built-in electric field; b. The electron-hole pairs are Sufficient lifetime and mobility, so that μt is large enough, μt is the drift distance during the lifetime of the electron hole under the action of the built-in field, ...

Claims

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Application Information

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IPC IPC(8): C08L51/08C08L51/02C08K3/22C08F291/08C08F291/06C08F220/18C08F220/56C08F220/06H01B1/22H01L31/0224
Inventor 黄新东刘天人
Owner WUXI SUNOCEAN
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