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Lead-free aluminum paste for solar battery

A technology for solar cells and lead-free aluminum paste, which is applied to conductive materials, circuits, and electrical components dispersed in non-conductive inorganic materials, and can solve the problems of poor conductivity, beading and blistering, and large warpage of aluminum paste. Achieve the effect of strong adhesion, high conversion efficiency and low ohmic contact resistance

Inactive Publication Date: 2010-07-28
西安宏星电子浆料科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The invention provides a lead-free aluminum paste for solar cells, which mainly solves the problems of poor electrical conductivity, low photoelectric conversion efficiency, large warping after sintering, and beading and blistering of the existing aluminum paste for solar cells

Method used

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Examples

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specific Embodiment 1 10

[0061] Table-1 Specific embodiments of the present invention one to ten, by mass percentage (%) are as follows:

[0062] Raw material one two three four five six seven eight nine ten

[0063] Aluminum powder 72.0 71.0 73.0 74.0 75.0 72.5 76.0 77.0 80.0 78.5

[0064] Glass powder 2.2 1.8 1.6 1.7 1.5 1.4 2.0 1.5 1.0 1.0

[0065] Organic Binder 24.8 27.2 23.4 21.8 22.5 25.3 21.5 21 18.5 19.5

[0066] First additive 1 0 2 1.5 1 0.8 0.5 0.5 0.5 1

specific Embodiment 1 5

[0067] Table-2 The specific examples one to five of the organic binder of the present invention are as follows by mass ratio (%):

[0068] Ingredients 1 2 3 4 5

[0069] Terpineol 48 50 55 60 57

[0070] Ethyl cellulose 3 5 3 5 4

[0071] Lecithin 2 1 2 1.5 1.5

[0072] Ethylene glycol phenyl ether 12 10 20 0 15

[0073] Butyl Carbitol 35 30 0 8.5 22.5

[0074] Carbitol acetate 0 4 20 15 0

[0075] Table-3 Inorganic glass powder concrete implementation five examples, by mass percentage (%) specific as follows:

[0076] Ingredients 1 2 3 4 5

[0077] SiO 2 : 48 50 39 40 38

[0078] Bi 2 o 3 : 37 33 45 43 45

[0079] TiO 2 : 10 10 8 7 9

[0080] B 2 o 3 : 2 3 4 3 2

[0081] ZnO: 1 2 2 4 3

[0082] MgO: 2 2 2 3 3

[0083] Get embodiment one in table-1, embodiment two in table-2, the data of embodiment three in table-3, carry out the preparation of lead-free aluminum paste for solar cells:

[0084] Preparation of organic binder: terpineol 50%, ethylene glycol ph...

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Abstract

The invention provides a lead-free aluminum paste for a solar battery, which is mainly used for producing a conductive electrode for a solar battery. The lead-free aluminum paste mainly comprises the following components by weight percent: 70 to 80 percent of aluminum powder, 19 to 30 percent of organic bond, 0.1 to 5 percent of inorganic glass powder and 0.1 to 2 percent of a first additive. The organic bond comprises the following components by weight percent: 40 to 60 percent of terpineol, 1 to 5 percent of ethylcellulose, 1 to 5 percent of lecithin and 20 to 50 percent of a second additive. The lead-free aluminum paste for the solar battery mainly solves the technical problems that the existing aluminum paste for the solar battery has poor electrical conductivity and low photoelectric conversion efficiency. The lead-free aluminum paste has the advantages of good electric conductivity, high photoelectric conversion efficiency and the like.

Description

technical field [0001] The invention relates to a raw material for producing conductive electrodes of solar cells, in particular to the composition and preparation method of lead-free solar cell aluminum paste. Background technique [0002] A solar cell is a semiconductor device that can convert solar energy into electrical energy. Under the condition of light, a photogenerated current will be generated inside the solar cell, and the electrical energy can be output through the electrodes. [0003] A solar cell structure with P-type silicon typically has its negative electrode on the front or positive side of the cell and its positive electrode on the back. When illuminated with light, radiation of the appropriate wavelength causes hole-electron pairs to be created in the semiconductor. The potential difference that exists across the P-N junction causes holes and electrons to migrate across the junction in opposite directions, creating a flow of current that transfers electr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/0224H01L31/18H01B1/16H01B1/22H01B13/00
CPCY02P70/50
Inventor 张利娟齐增亮赵莹
Owner 西安宏星电子浆料科技股份有限公司
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