Front silver paste for crystalline silicon solar battery plate and preparation method thereof

A technology of solar cells and crystalline silicon, applied in the field of solar cells, can solve the problems of silver paste shrinkage, thin line resolution, aspect ratio, etc., to reduce shrinkage, increase contact area, and strengthen conductive pathways Effect

Inactive Publication Date: 2011-03-16
长沙族兴新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For example, Chinese invention application CN101118932A (conductive paste for front electrode of solar cell), CN101515604A (silver paste for solar cell and preparation method thereof), CN101609850A (lead-free silver conductor paste for front electrode of solar cell and preparation process thereof), CN101702416A (Preparation method of environment-friendly silicon-based solar cell front silver paste), CN101271928A (high viscosity solar cell front silver paste and preparation method thereof), CN101295739A (solar cell front electrode conductive paste and preparation method thereof), CN101630695A (lead-free a

Method used

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  • Front silver paste for crystalline silicon solar battery plate and preparation method thereof
  • Front silver paste for crystalline silicon solar battery plate and preparation method thereof
  • Front silver paste for crystalline silicon solar battery plate and preparation method thereof

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Experimental program
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Embodiment

[0026] The present invention is used for the silver paste embodiment of crystalline silicon solar cell front face and sees the following table (table one, table two):

[0027] Table I

[0028]

[0029] Table II

[0030]

[0031]

[0032] According to the above formula requirements, silver powder, inorganic binder, organic resin, organic solvent, organic silver salt and additives are stirred to form a uniform paste-like semi-fluid, and then rolled on a three-roll mill until it becomes uniform and has good fluidity The slurry has a fineness of ≤5 microns and a viscosity between 200,000-280,000mPa.s.

[0033] The performance parameters of the silver paste used for the front side of the crystalline silicon solar cell sheet produced according to the foregoing embodiments are as follows (table three):

[0034] Table three

[0035]

[0036] According to the above experimental results, it can be known that the performance parameters of Examples 1-8 are significantly imp...

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Abstract

The invention provides a front silver paste for a crystalline silicon solar battery plate. The front silver paste comprises silver powder, an inorganic adhesive, an organic resin, an organic solvent, an additive, and organic silver salt. In the silver paste provided by the invention, by adding the organic silver salt, from which nano-scale silver particles and submicron-scale silver particles can be separated out by thermolysis, and filling the gaps of the silver powder with the silver particles separated out by the thermolysis, the contact area among the particles is effectively increased, the conducting path is enhanced, and the conductivity of a film layer is improved; meanwhile, the stacking density of the film layer is also improved and the shrinkage rate of the film layer is reduced. The invention also provides a preparation method of the front silver paste for the crystalline silicon solar battery plate.

Description

technical field [0001] The invention relates to the technical field of solar cells, in particular to a front silver paste for solar cells and a preparation method thereof. Background technique [0002] Both the front and back of the crystalline silicon solar cells are coated with paste, and the paste used on the front is usually conductive silver paste. The performance of conductive silver paste plays a decisive role in the photoelectric conversion efficiency of solar cells. The existing conductive silver paste is generally made of raw materials such as silver powder, inorganic binder, organic resin and organic solvent according to different proportions. After sintering, it has disadvantages such as high shrinkage, low resolution of thin lines, and small aspect ratio, which directly affects Photoelectric conversion efficiency of solar cells. [0003] Currently, research is very active in improving the quality of silver paste for solar cells. For example, Chinese invention...

Claims

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Application Information

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IPC IPC(8): H01B1/22H01B13/00H01L31/0224
Inventor 梁晓斌夏风罗夔苏力农
Owner 长沙族兴新材料股份有限公司
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