Paste for electrode forming of solar cell

A solar cell and electrode technology, applied in conductive materials, circuits, photovoltaic power generation and other directions dispersed in non-conductive inorganic materials, can solve problems such as decreased mechanical strength substrate adhesion, BSF shedding, substrate bending, etc. Excellent adhesion, suppression of warpage, and improved efficiency

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

[0005] However, when the back paste used in the electrode formation of conventional silicon solar cells is fired for a short time at a high temperature (800 to 950° C.), the mechanical strength and the adhesion to the base material decrease, and after firing, The problem that the base material is warped and the BSF falls off when the electrode layer is thinly formed

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] 66.7 parts by weight of spherical aluminum powder with an average particle diameter of 2.68 μm and 33.3 parts by weight of spherical aluminum powder with an average particle diameter of 5.28 μm were uniformly mixed to produce an aluminum powder for solar cell electrode formation with a tap density of 1.35 g / cc . 67.5 parts by weight of aluminum powder with a tap density of 1.35 g / cc, 3.0 parts by weight of low-melting glass powder with a particle size of 3.36 μm and a softening point of 466° C., 27.7 parts by weight of an organic vehicle (which is made of ethyl cellulose nitrocellulose and butyl carbitol acetate in a weight ratio of 72:72:131), 1.5 parts by weight of a tackifier, and 0.5 parts by weight of a surfactant using a three-roll mixer Mix and disperse to produce a paste for solar cell electrode formation.

Embodiment 2

[0033] In Example 1, the tap density obtained by mixing 50 parts by weight of spherical aluminum powder with an average particle diameter of 2.68 μm and 50 parts by weight of spherical aluminum powder with an average particle diameter of 5.28 μm is 1.43 g / cc Aluminum powder, except that, the same method as in Example 1 was used to prepare a solar cell electrode-forming paste.

Embodiment 3

[0035] In Example 1, the tap density obtained by mixing 74.6 parts by weight of spherical aluminum powder with an average particle diameter of 2.68 μm and 25.4 parts by weight of spherical aluminum powder with an average particle diameter of 5.28 μm is 1.29 g / cc Aluminum powder, except that, the same method as in Example 1 was used to prepare a solar cell electrode-forming paste.

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PUM

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Abstract

The invention provides a sizing agent for forming an electrode of a solar cell. The sizing agent has the following advantages that: the mechanical strength of the electrode and the closing performance with the base material are good, the back surface field (BSF) effect required by the solar cell can be accomplished thoroughly, the bend of the base material after burned can be restrained, the efficiency of the solar cell can be improved, and the sizing agent is more particularly suitable for burning at high temperature / high speed with excellent mass production. The sizing agent for forming an electrode of a solar cell is characterized in that a) 60-75 parts by weight of aluminum power with at least 1.28 g / cc of tap density, b) 1-5 parts by weight of glass powder, and c) 20-38 parts by weight of organic carrier are included.

Description

technical field [0001] The present invention relates to a paste for forming electrodes of a solar cell, and in particular to a paste for forming an electrode of a solar cell and a method for forming an electrode of a solar cell using the paste: the mechanical strength of the electrode and the contact with the electrode of the solar cell The adhesion of the base material is excellent, and it can fully achieve the back surface electric field (BSF, back surface field) effect required by the solar cell, which can suppress the bending phenomenon of the base material after firing, and can improve the efficiency of the solar cell, especially suitable for Suitable for high temperature / high speed firing, excellent in mass production. Background technique [0002] Recently, solar cells have been rapidly popularized due to various reasons such as non-pollution, simplicity of equipment, and improved durability. Therefore, methods for manufacturing solar cells that can improve the effici...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/0224H01L31/18H01B1/22H01B13/00C08L1/18C08K3/40C08K3/08H01L31/04H01B1/16
CPCY02E10/50Y02P70/50H01B1/16H01B1/22H01L31/022425
Inventor 朴赞硕高俊黄建镐金泰成
Owner DONGJIN SEMICHEM CO LTD
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