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Aluminum paste for improving conversion efficiency of solar cells and preparation method for aluminum paste

A technology for solar cells and conversion efficiency, which is applied in the manufacture of cables/conductors, conductive materials dispersed in non-conductive inorganic materials, circuits, etc., can solve the problems that can no longer be improved, achieve convenient implementation, improve conversion efficiency, cost saving effect

Inactive Publication Date: 2012-02-22
SHAANXI TIANSHENG NEW MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The existing aluminum paste uses two types of glass powder, Ts012 and Ts0015, respectively as inorganic binders. These two glass powders are combined with different components and processes of other aluminum pastes, although they can also meet the requirements of solar cells for aluminum paste. , but it seems that they have reached their respective limits in improving the conversion efficiency of solar cells and cannot be further improved

Method used

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  • Aluminum paste for improving conversion efficiency of solar cells and preparation method for aluminum paste
  • Aluminum paste for improving conversion efficiency of solar cells and preparation method for aluminum paste
  • Aluminum paste for improving conversion efficiency of solar cells and preparation method for aluminum paste

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Embodiment Construction

[0052] The concrete implementation of the present invention is illustrated below by example:

[0053] Preparation of organic carrier (by weight): 35 parts of terpineol, 10 parts of benzyl alcohol, 25 parts of butyl carbitol acetate, 30 parts of diethylene glycol butyl ether, 5 parts of ethyl cellulose, phenolic resin 3 parts, 1 part of 201 methyl silicone oil, 1 part of lecithin, the total weight of the composition is 100 parts, the above materials are mixed in a water bath, heated to 85 ° C, stirred for 4 hours, until the ethyl cellulose, phenolic resin, etc. are completely dissolved, Take it out after cooling, sieve through 800 mesh, and let it stand for 24 hours to make an organic carrier.

[0054] The preparation of glass powder (by weight):

[0055] Ts012: 50 parts of bismuth trioxide (Bi2O3), 20 parts of zinc oxide (ZnO), 10 parts of diboron trioxide (B2O3), 5 parts of calcium oxide (CaO), 3 parts of aluminum oxide (Al2O3), magnesium oxide (MgO) 1 part, indium powder 1...

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Abstract

The invention relates to aluminum paste for improving the conversion efficiency of solar cells and a preparation method for the aluminum paste. The aluminum paste consists of the following components in part by weight: 60 to 80 parts of aluminum powder, 15 to 40 parts of organic carrier and 2 to 5 parts of inorganic adhesive, wherein the particle size of the aluminum powder is 1 to 10mu m. The invention solves the technical problem that aluminum paste for improving the conversion efficiency of silicon solar cells and a preparation method thereof are provided. By the aluminum paste, the conversion efficiency of the solar cells is averagely improved by 1 time, and the electrical performance is also improved; and the appearance also meets the requirements of the solar cells.

Description

technical field [0001] The invention relates to an aluminum paste capable of improving the conversion efficiency of solar cells and a preparation method. Background technique [0002] In the preparation process of silicon solar cells, the aluminum paste is printed on the back of the solar cell by screen printing, and after drying and sintering, a dense aluminum film layer is formed on the back of the solar cell. Its main function It is to form a back electric field, eliminate surface defects, annihilate the PN junction, reflect sunlight, etc. Therefore, the aluminum film plays a very important role in improving the electrical properties of solar cells, especially the conversion efficiency of solar cells. [0003] The aluminum paste components for silicon solar cells are composed of aluminum powder, inorganic binder glass powder and organic vehicle, wherein the organic vehicle is an organic binder, and its function is to make the aluminum paste in the storage state Other so...

Claims

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Application Information

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IPC IPC(8): H01B1/22H01B13/00
Inventor 汪建辉武立新刘植
Owner SHAANXI TIANSHENG NEW MATERIAL TECH
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