Organic carrier for silver paste and preparation method thereof as well as silver paste containing organic carrier and solar cell manufactured from silver paste

A solar cell and organic carrier technology, applied in the field of solar cells, can solve problems such as high viscosity, lower production efficiency, and affect printing speed, and achieve the effects of simple preparation process, high photoelectric conversion efficiency, and large aspect ratio

Inactive Publication Date: 2011-07-27
湖南威能新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The organic carrier is used to prepare high-viscosity solar cell front silver paste with a viscosity of 220-300Pa.s. Although this high-viscosity silver paste can make the printed solar front electrode not easy to collapse, it is not easy to Printing, affecting printing speed and reducing production efficiency

Method used

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  • Organic carrier for silver paste and preparation method thereof as well as silver paste containing organic carrier and solar cell manufactured from silver paste

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Prepare 100 g of organic vehicle according to the formula in Table 1. Weigh solvent terpineol: 70g, then thickener ethylcellulose: 5g, thixotropic agent hydrogenated castor oil: 2g, surfactant Span 85: 3g, plasticizer dibutyl phthalate: 20 g was added to the solvent, and the mixture was placed in a container and heated in a water bath at 60° C., and stirred at a speed of 60 rpm to completely dissolve it to obtain an organic vehicle. Then with 16wt% organic carrier and 84wt% solid powder (wherein solid powder is the silver powder of 80wt%, the lead borosilicate glass powder of 3wt%, the titanium dioxide additive of 1wt%) is formulated into slurry, and this slurry has suitable Viscosity, the viscosity is 180Pa·s (10rpm, 25°C), excellent printing performance, meeting the high-speed and high-resolution screen printing requirements of 325-mesh stainless steel stencil, using this conductive silver paste to print the conductive silver paste on the battery substrate through Sc...

Embodiment 2

[0030] Prepare 100 g of organic vehicle according to the formula in Table 1. Weigh solvent butyl carbitol: 65g, then thickener ethylcellulose: 4g, thixotropic agent fumed silica: 3g, surfactant lecithin: 4g, plasticizer tributyl citrate: 24g is added in the solvent, heated in a water bath at 60°C, and stirred at a speed of 60 rpm to make it all dissolve, with 16wt% organic carrier and 84wt% solid powder (wherein the solid powder is 80wt% silver powder, 3wt% lead borosilicate glass powder, 1wt% titanium dioxide additive) to prepare a slurry, the slurry has a suitable viscosity, the viscosity is 191Pa s (10rpm, 25 ℃), excellent printing performance, to meet the 325 mesh stainless steel screen According to the high-speed and high-resolution screen printing requirements, use the conductive silver paste on the battery substrate to sinter the conductive silver paste by screen printing to obtain the front electrode and grid line of the solar cell panel, and the solar cell sheet front...

Embodiment 3

[0033] Prepare 100 g of organic vehicle according to the formula in Table 1. Weigh solvent butyl carbitol acetate: 60g, then successively thickener ethylcellulose: 3g, thixotropic agent organic bentonite: 4g, surfactant oleic acid: 5g, plasticizer dibutyl phthalate Esters: 28g is added in the solvent, heated in a water bath at 60°C, and stirred at a speed of 60 rpm to make it all dissolve, use 16wt% organic carrier and 84wt% solid powder (wherein the solid powder is 80wt% silver powder, 3wt% lead borosilicate glass powder, 1wt% titanium dioxide additive) to prepare a slurry, the slurry has a suitable viscosity, the viscosity is 203Pa s (10rpm, 25 ℃), excellent printing performance, to meet 325 mesh stainless steel The high-speed and high-resolution screen printing requirements of the screen, use the conductive silver paste on the battery substrate to sinter the conductive silver paste by screen printing to obtain the front electrode and grid line of the solar cell panel, and t...

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Abstract

The invention discloses an organic carrier for conductive silver paste applied to a front face electrode and a grid line of a solar cell, a preparation method of the organic carrier, silver paste containing the organic carrier and a solar cell manufactured from the silver paste. The organic carrier comprises the following components in percentage by weight: 60-75 percent of solvent, 1-10 percent of thickener, 0.3-5 percent of thixotropic agent, 1-5 percent of surfactant and 10-30 percent of plasticizer. The preparation method of the organic carrier comprises the following steps of: weighing various raw materials; adding various aids into a solvent respectively; and heating and stirring until the aids are dissolved completely. The organic carrier has proper viscosity and a simple preparation process. Paste prepared from the organic carrier has proper viscosity, fineness, leveling property, thixotropy and chemical stability. After the paste is subjected to screen printing and sintering on a cell substrate, the thicknesses of a front face electrode and a grid line thick film of a cell panel can be over 20 micros, and the prepared electrode and the grid line thick film can obtain a higher height-width ratio.

Description

technical field [0001] The invention belongs to the technical field of solar cells, and in particular relates to an organic carrier for a solar cell front electrode and grid line conductive silver paste, a preparation method thereof, a silver paste containing the organic carrier, and a solar cell manufactured by containing the silver paste. Background technique [0002] Solar energy is a kind of green energy. People pay more and more attention to it because of its advantages of no pollution, inexhaustibility, and no limitation of geographical resources. Therefore, solar cells have emerged 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. The front and back electrodes and grid lines of solar cells are made of conductive silver paste through high-speed and high-precision screen p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B1/22H01L31/0224
Inventor 张海旺张金玲周华刘继宇甘卫平郭桂全向锋甘景豪
Owner 湖南威能新材料科技有限公司
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