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Organic adhesive for electrode paste of silicon solar cell and preparation method thereof

A technology for silicon solar cells and organic binders, applied in the direction of binder types, cellulose binders, aldehyde/ketone condensation polymer binders, etc., can solve problems such as casting, and achieve large aspect ratios Effect

Inactive Publication Date: 2010-10-20
IRICO
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  • Abstract
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Problems solved by technology

[0010] The purpose of the present invention is to overcome the defects of casting in traditional organic adhesives, to provide an organic adhesive for silicon solar cell electrode paste and its preparation method

Method used

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  • Organic adhesive for electrode paste of silicon solar cell and preparation method thereof

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Embodiment Construction

[0022] The present invention is described in further detail below:

[0023] An organic binder for a silicon solar cell electrode paste and a preparation method thereof, comprising the following basic steps:

[0024] (1) Weigh the components of the organic binder according to mass percentage: ethyl cellulose 8-12%, epoxy resin 3-7%, phenolic resin 3-7%, organic solvent 68-82%, dispersant 0.5-4% and 0.5-4% thixotropic agent, the total mass percentage of each component is 100%;

[0025] (2) Add the weighed components into the oil bath reactor, heat and stir until the resin powder is completely dissolved to form a yellowish transparent solution, and then keep it warm;

[0026] (3) After cooling the pale yellow transparent solution in the step (2), filter through a 200-350 mesh screen to obtain an organic binder for silicon solar cell electrode paste.

[0027] Described organic solvent is butyl carbitol, propylene glycol methyl ether acetate, ethylene glycol ethyl ether, ethylene...

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Abstract

The invention discloses an organic adhesive for the electrode paste of a silicon solar cell and a preparation method thereof. The preparation method comprises the following steps: (1) weighting the raw materials of the organic adhesive according to the raw material composition and weight percentages thereof; (2) adding the weighted components in a reaction tank using water bath, heating and stirring to ensure that resin powder is completely dissolved to form a yellowish and transparent solution, then keeping the temperature; and (3) cooling the yellowish and transparent solution, using a silkscreen to filter, and obtaining the organic adhesive for the electrode paste of the silicon solar cell. By using the paste prepared from the organic adhesive, the dispersion uniformity of solid powder material can be maintained, the paste can be stored for long time without layering, and the printed grating has larger height-width ratio and can not cause casting.

Description

Technical field: [0001] The invention belongs to the technical field of electronic materials, and relates to an organic binder for silicon solar battery electrode paste and a preparation method thereof. Background technique: [0002] With the increasing shortage of traditional energy sources, the development and utilization of new energy sources such as solar energy and wind energy are gradually being introduced to the market. After years of development, the solar energy industry has become very mature. The current solar cells are mainly crystalline silicon solar cells. [0003] In the preparation process of crystalline silicon solar cells, silver paste is printed on the front and back of silicon wafers to form gate wire electrodes, which have the function of serving as lead electrodes for series-parallel connection between solar cells and improving the conversion efficiency of cells. [0004] Silver paste is mainly composed of silver powder, inorganic binder, organic binder...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J101/26C09J163/00C09J161/06H01L31/0224
Inventor 李宝军
Owner IRICO
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