Conductive paste composition, preparation of electrode using same and solar cell comprising same

A technology of composition and conductivity, applied in the direction of active material electrodes, battery electrodes, conductive materials dispersed in non-conductive inorganic materials, etc., can solve the problems of insufficient long-term reliability, reduce sintering density, etc., and achieve low shrinkage , Improve efficiency, low line impedance and contact impedance effect

Inactive Publication Date: 2010-06-09
DAEJOO ELECTRONICS MATERIALS CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this will cause the electrode to shrink during sintering and increase the line impedance, and physical defects such as fragments will also occur after firing, reducing the sintering density and causing problems such as insufficient long-term reliability.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] 16% by weight of spherical silver powder with an average particle size of 0.05μm, 65% by weight of plate-shaped silver powder with an average particle size of 3.5μm, lead borosilicate series with a softening temperature of 500°C and an average particle size of 1.5μm The weight percentage of glass powder is 4%, the weight percentage of organic media made by dissolving ethyl cellulose resin in carbitol acetate cellulose solvent is 14%, the weight percentage of amino wax plasticizer and organic acid leveling agent is 1%, It was then dispersed and pulverized to a viscosity of 150,000 to 250,000 CPS (Brookfield DVII Viscometer, Rotary #14) with a shaft roller to produce a paste composition.

Embodiment 2

[0053] Except that the weight percentage of spherical silver powder with an average particle size of 0.05 μm is 20%, and the weight percentage of plate-shaped silver powder with an average particle size of 3.5 μm is 61%, in the same manner as in Example 1, it is made into 150,000 to 250,000 Paste composition of CPS viscosity.

Embodiment 3

[0055] The spherical silver powder with an average particle size of 0.05 μm is 5% by weight, the spherical silver powder with an average particle size of 0.2 μm is 20% by weight and the plate silver powder with an average particle size of 3.5 μm is 56% by weight, except In addition, in the same manner as in Example 1, a paste composition having a viscosity of 150,000 to 250,000 CPS was prepared.

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PUM

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Abstract

The invention relates to a conductive paste composition, preparation of electrode using the same and solar cell comprising the same. The conductive paste composition comprises a mixing powder comprising a micro conductive metal powder with average grain size of below 0.5Mum and a conductive metal powder with average grain size of between 0.5 to 10Mum, an inorganic viscosity resin and an organic medium. The conductive paste composition can have high sintered density during preparing the electrode material and less sintering shrinkage, thereby providing lower electrode line impedance and contact impedance and increased efficiency of the solar cell.

Description

technical field [0001] The present invention relates to a conductive paste composition, a method for producing electrodes using the same, and a solar cell. Background technique [0002] Solar cell (SOLAR CELL) is a semiconductor component that converts solar energy into electrical energy. Its electrode material is coated with conductive paste components on the main board by ordinary screen printing and other methods to form a special form of electrode circuit, which is dried and heat-treated. Afterwards, it can have electrical conductivity. [0003] The electrode materials for printed solar cells that have been commercialized are that the organic substances are removed (or burned) by the heat treatment process in the micro state, resulting in defects inside the electrode or low sintering density due to short sintering time. Improve the line impedance, and the contact impedance with the silicone plate is larger. Under normal circumstances, the defects inside the electrode a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/0224H01L31/18H01L31/042H01B1/22H01L31/04H01M4/02
CPCY02E60/12Y02E10/50Y02E60/10Y02P70/50H01B1/02H01B1/22H01L31/022425H01L31/04H01M4/02H01M2004/021
Inventor 朴钟炫李真权
Owner DAEJOO ELECTRONICS MATERIALS CO LTD
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