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Front-face electrode slurry with low silver content for silica-based solar cell main grid and preparation method of front-face electrode slurry

A technology of solar cells and front electrodes, applied in conductive materials dispersed in non-conductive inorganic materials, cable/conductor manufacturing, circuits, etc., can solve the problems of no busbar and fine grid, distinction, etc., to reduce the cost of paste , The effect of strong film density and good weldability

Active Publication Date: 2014-02-12
HANGZHOU RIGHTSILVER ELECTRONICS MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, there is no distinction between the main grid and the fine grid in the use of paste imported from abroad, and they are all used as paste with high silver content.

Method used

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  • Front-face electrode slurry with low silver content for silica-based solar cell main grid and preparation method of front-face electrode slurry
  • Front-face electrode slurry with low silver content for silica-based solar cell main grid and preparation method of front-face electrode slurry
  • Front-face electrode slurry with low silver content for silica-based solar cell main grid and preparation method of front-face electrode slurry

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Embodiment 1-6

[0036] A front electrode paste with low silver content for the main grid of silicon-based solar cells is prepared by mixing the raw materials shown in Table 1 in terms of mass percentage. Put the silver powder, glass powder, organic binder and inorganic additives into the vacuum mixer according to the ratio in Table 1, and keep stirring for about 2 hours to form a uniform mixture, and then grind and disperse through a three-roll mill to form a homogeneous slurry. Control the fineness of the scraper to ≤10 μm, and then filter through a 500-mesh screen to obtain a front electrode slurry with a viscosity of 50-70 Pa·s.

[0037] Table 1 (weight: g)

[0038]

[0039] ①Silver powder

[0040]The silver powder that each embodiment adopts: the spherical silver powder prepared by selective liquid phase reduction method, its purity >=99.95% of silver powder, average particle diameter 1.54 μ m, specific surface area 1.25 m 2 / g, tap density 5.60g / ml. The above-mentioned silver powde...

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Abstract

The invention relates to an electrode material of a crystalline silicon solar cell, in particular to front-face electrode slurry with the low silver content for a silica-based solar cell main grid and a preparation method of the front-face electrode slurry. The front-face electrode slurry with the low silver content for the silica-based solar cell main grid is mainly formed by mixing, by weight, 65-75% of silver powder, 21-31% of organic bond, 1-8% of glass powder and 0.5-3% of inorganic additives. The front-face electrode slurry is used for crystalline silicon solar cell main grid lines, and developed for reducing the production cost and the manufacturing cost of the silica-based solar cell. The front-face electrode slurry is printed on the back face of the crystalline silicon solar cell, and forms a silver electrode with the high adhesive force and the high reliability on the main grid on the front face of the crystalline silicon solar cell through the infrared fast-burning process, wherein the actual peak temperature of the surface of a silicon wafer is 780-810 DEG C, and the peak time is 1-2s.

Description

technical field [0001] The invention relates to an electrode material for a crystalline silicon solar cell, in particular to a front electrode paste with a low silver content for a main grid of a silicon-based solar cell and a preparation method thereof. Background technique [0002] Crystalline silicon solar cell is a semi-permanent physical battery that converts sunlight energy into electrical energy. With the extreme consumption of fossil (petroleum, coal, natural gas, etc.) The demand for clean energy is becoming more and more urgent. For a long time in the future, the sun will be an effective provider of clean energy for human beings. At present, crystalline silicon solar cells are one of the effective devices for converting solar energy into civil energy. Its application range is expanding from aerospace, military, to people's Daily life, while not generating new pollution, the cost reduction will make solar cells more widely used. [0003] Crystalline silicon solar ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B1/22H01B1/16H01B13/00H01L31/0224
Inventor 杨锐昌杨荣春杨华
Owner HANGZHOU RIGHTSILVER ELECTRONICS MATERIAL
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