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Silver-aluminum slurry material for preparing solar energy battery and preparation technique thereof

A solar cell and silver-aluminum paste technology, which is applied in the direction of sustainable manufacturing/processing, circuits, electrical components, etc., can solve the problems that have not been broken through, the conductivity of the finished paste is insufficient, and the stability of the silver-aluminum paste cannot be solved. Reduce usage, avoid aluminum beads, avoid out-of-sync effects

Inactive Publication Date: 2008-01-16
SHANGHAI OLINDA SOLAR ENERGY TECH
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current electronic pastes for electrode printing and firing are mainly three types: aluminum paste, silver paste and silver-aluminum paste. The main raw materials of the three pastes are different, and their performances are different. Silver-aluminum paste and aluminum paste are used on the back-field electrode, that is, the back-side of the sun. The preparation of aluminum paste has made a breakthrough in China, and the product quality basically meets the production requirements. However, the preparation technology of silver-aluminum paste and silver paste has not been broken through. There is still a certain gap between the products of the manufacturer, mainly because the stability of the silver-aluminum paste cannot be solved once, and the conductivity of the finished paste is insufficient.

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  • Silver-aluminum slurry material for preparing solar energy battery and preparation technique thereof

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Embodiment Construction

[0011] The present invention will be further described below, and the present invention is relatively clear to those skilled in the art.

[0012] Prepare four kinds of silver-aluminum paste: first take silver-aluminum metal powder accounting for 74% of the total weight, of which silver powder: aluminum powder is 20%: 80%, it is best to control the proportion of flake silver powder in all raw materials at 2% to 5% Within the range, because when the flake silver powder content is less than 2%, the flake silver powder is difficult to fully diffuse and distribute in combination with silver and aluminum, and cannot play the role of transition connection. When the aluminum powder content is high, aluminum beads will be produced during the printing process. , affecting electrode performance, when the content is higher than 5%, the dispersion of flake silver powder is difficult to control, and because the proportion of aluminum powder is low, the conductivity of silver aluminum paste i...

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Abstract

The invention relates to the silver-aluminum paste for battery technical field, specifically is a silver-aluminum paste material for preparing solar batteries and the preparation process of the silver-aluminum paste material, which is characterized in being prepared by the raw materials with a weight percent of 65 to 77 metal powder, 12 to 18 organic medium, 1 to 5 glass powder and 10 to 17 ethyl cellulose terpineol. Compared with prior art, the amount of the silver paste with high price is reduced, asynchrony silver-aluminum sintering is avoided, and aluminum pills generated during printing and firing are avoided.

Description

[technical field] [0001] The invention relates to the technical field of silver-aluminum paste for batteries, in particular to a silver-aluminum paste material for preparing solar cells and a preparation process thereof. [technical background] [0002] Silver-aluminum paste is mainly used as an electrode material in the field of solar cells. With the development of solar cell manufacturing technology, the requirements for battery electrode materials are: thinner paste printing; high temperature and high speed one-time co-firing; paste cost reduction. [0003] In addition, the paste for solar cells requires that the paste has good printing performance, good electrical properties, solderability and no deformation of the silicon wafer after printing, no beading after firing, and no ash during assembly. The current electronic pastes for electrode printing and firing are mainly three types: aluminum paste, silver paste and silver-aluminum paste. The main raw materials of the thre...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L1/26C08K5/541H01L31/0224H01L31/18C08K3/08C08K3/40
CPCY02P70/50
Inventor 王军林
Owner SHANGHAI OLINDA SOLAR ENERGY TECH