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Paste for electrode forming of solar cell

A technology of solar cells and pastes, which is applied to conductive materials dispersed in non-conductive inorganic materials, circuits, photovoltaic power generation, etc., can solve the problems of increased firing shrinkage, decreased sinterability, and decreased resolution. Low firing shrinkage, excellent mass productivity, and high-resolution effects

Inactive Publication Date: 2008-11-12
DONGJIN SEMICHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, when the paste used in the electrode formation of the conventional silicon solar cell is fired at a high temperature (800°C to 950°C) for a short time, the sinterability decreases, the firing shrinkage increases, and the resolution decreases. question

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031]12.4 parts by weight of spherical aluminum powder with an average particle diameter of 0.37 μm, 62.1 parts by weight of spherical aluminum powder with an average particle diameter of 1.86 μm, and 6.2 parts by weight of spherical silver powder with an average particle diameter of 3.24 μm were mixed to obtain a tap density of 5.26 g Silver powder / cc, 80.7 parts by weight of the obtained silver powder with a tap density of 5.26g / cc, 1.1 parts by weight of a particle diameter of 3.36 μm and a softening point of low melting point glass powder of 466 ° C, 14.1 parts by weight of ethyl cellulose It was mixed and dispersed with 2.6 parts by weight of butyl carbitol acetate, 1.0 parts by weight of a viscosity modifier, and 0.5 parts by weight of a surfactant using a three-roll mixer to prepare a slurry for forming a solar cell electrode.

Embodiment 2

[0033] In the above-mentioned embodiment 1, use 9.3 parts by weight of spherical aluminum powder with an average particle diameter of 0.37 μm, 64.9 parts by weight of spherical aluminum powder with an average particle diameter of 1.86 μm, and 6.5 parts by weight of spherical silver powder with an average particle diameter of 3.24 μm. The tap density obtained by mixing was the silver powder of 5.17 g / cc, and the paste for solar cell electrode formation was manufactured by the method similar to the said Example 1.

Embodiment 3

[0035] In said Example 1, except having mixed 1.0 weight part of silver acetates further, the method similar to said Example 1 was carried out, and the slurry for solar cell electrode formation was manufactured.

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PUM

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Abstract

The invention provides a paste for forming electrode of solar battery which has the advantages that the paste is suitable for high efficiency and high resolution and suitable for high temperature / high speed sintering with excellent output. The paste for forming electrode of solar battery contains silver powder, glass powder and organic carrier. The invention is characterized in that the silver powder has a tap density of at least 5g / cc.

Description

technical field [0001] The present invention relates to a paste for forming a solar cell electrode, and more particularly, to a paste for forming a solar cell electrode and a method for forming a solar cell electrode using the paste, which are not only suitable for high efficiency and high resolution , but also especially suitable for high temperature / high speed firing, excellent in mass production. Background technique [0002] Recently, solar cells are rapidly gaining popularity due to various reasons such as non-pollution, simplicity of equipment, and improved durability. Therefore, methods for manufacturing solar cells that can improve the efficiency of solar cells and are excellent in mass production have been studied. Various studies. [0003] Electrodes in conventional silicon solar cells are formed by printing a paste containing conductive metal powder, glass frit, and an organic vehicle on a silicon substrate, drying and firing to form the electrodes. Firing inclu...

Claims

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Application Information

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IPC IPC(8): H01L31/0224H01L31/18H01B1/22H01B13/00H01L31/04H01B1/02
CPCY02E10/50Y02P70/50H01B1/22H01L31/022425
Inventor 朴赞硕高俊黄建镐金泰成
Owner DONGJIN SEMICHEM CO LTD
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