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Organic carrier composition for solar cell back surface field aluminium paste and preparation method thereof

A technology of solar cells and back-field aluminum paste, which is applied in the direction of cable/conductor manufacturing, conductive materials dispersed in non-conductive inorganic materials, circuits, etc., and can solve problems such as easy generation of fragments, high stress on silicon wafers, and deterioration of environmental pollution , achieve good dry film adhesion, reduce debris rate, and eliminate environmental hazards

Inactive Publication Date: 2010-12-15
CHANGZHOU YINGDE ENERGY TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In the prior art, most of the solvents and plasticizers in the above-mentioned organic carrier composition are ortho-phenyl esters, which will not only cause environmental pollution and deterioration, but also endanger the health of people who are directly or indirectly exposed to it
In addition, the binder in the organic vehicle composition in the prior art uses a phenolic resin with too strong cohesive force, so that the dried aluminum paste exerts a large stress on the silicon wafer and is prone to fragments

Method used

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  • Organic carrier composition for solar cell back surface field aluminium paste and preparation method thereof
  • Organic carrier composition for solar cell back surface field aluminium paste and preparation method thereof
  • Organic carrier composition for solar cell back surface field aluminium paste and preparation method thereof

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Embodiment Construction

[0032] The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0033] Before describing the present invention, some basic principles and mechanisms involved in the present invention will be briefly introduced.

[0034] First, the general requirements for the selection of the organic carrier system for the back field aluminum paste of solar cells are as follows:

[0035] ·Chemically inert substances: no chemical reaction occurs when the carrier contacts with the aluminum powder particles, including heating;

[0036] Able to form a suspension: on the interface where the carrier and the aluminum powder particles are in contact with each other, the surface tension should be as small as possible to ensure good infiltration between the solid and the liquid; the carrier should have polar groups that stabilize the electrolyte, and should not There is an excessive amount of coagulant to avoid coagulation ...

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Abstract

The invention relates to an organic carrier composition for solar cell back surface field aluminium paste, comprising a main carrier; wherein the main carrier comprises the following components by mass: 3-5% of methylcellulose, 30-45% of terpinol, 20-40% of diethylene glycol monobutyl ether, 10-20% of diethylene glycol monobutyl ether acetate and 0.2-1% of lecithin. The invention also relates to a method for preparing the organic carrier composition used for solar cell back surface field aluminium paste. In the organic carrier composition for solar cell back surface field aluminium paste and preparation method thereof which are provided by the invention, diethylene glycol monobutyl ether acetate is adopted to substitute the traditional o-benzene compound and is taken as solvent and plasticizer, thus eliminating environmental harm of organic carrier.

Description

technical field [0001] The invention relates to the technical field of thick-film electronic paste compositions, in particular to an organic carrier composition for solar cell backfield aluminum paste and a preparation method thereof. Background technique [0002] Theoretically, the highest photoelectric conversion efficiency of monocrystalline silicon solar cells is 30%, and the highest efficiency of polycrystalline silicon solar cells is 24%. At present, the maximum conversion efficiency of monocrystalline silicon solar cells has been greatly improved in the laboratory, which is 24.7%, which is close to the maximum efficiency value. However, due to the existence of many grain boundaries in polycrystalline silicon solar cells, the recombination centers formed by these grain boundaries cause the photovoltaic conversion efficiency of polycrystalline silicon to be far lower than that of single crystal silicon, and the photoelectric conversion efficiency is 19.8%. The efficien...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L1/28C08L93/04H01B1/22H01B13/00H01L31/0224H01L31/18
CPCY02P70/50
Inventor 屠涵春戈晨
Owner CHANGZHOU YINGDE ENERGY TECH
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