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Electroconductive composition for forming solar cell collector electrode, and solar cell

A technology of solar cells and collector electrodes, which is applied to conductive materials, electrical components, circuits, etc. dispersed in non-conductive inorganic materials, can solve problems such as lowering yield of solar cells

Inactive Publication Date: 2013-05-01
YOKOHAMA RUBBER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] If the characteristics change in this way depending on the sintering temperature, depending on the degree, there may be problems such as a decrease in the yield when manufacturing solar cells, or the need to control the sintering temperature with high precision in order to improve the yield.

Method used

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  • Electroconductive composition for forming solar cell collector electrode, and solar cell
  • Electroconductive composition for forming solar cell collector electrode, and solar cell
  • Electroconductive composition for forming solar cell collector electrode, and solar cell

Examples

Experimental program
Comparison scheme
Effect test

example 1-1～1-14、 example 2-1～2-8

[0139] (Examples 1-1 to 1-14, Examples 2-1 to 2-8, Comparative Examples 1-1 to 1-5, Comparative Examples 2-1 to 2-4)

[0140]

[0141] A conductive composition was prepared by adding and mixing conductive particles and the like shown in Table 1 below to a composition ratio (mass ratio) shown in Table 1 below in a ball mill.

[0142] In addition, the nickel octoate used in Comparative Examples 1-4 is a fatty acid metal formed by ionic bonding of the fatty acid (octanoic acid) in the "same" fatty acid silver salt (B) (octanoic acid silver salt) and a metal (nickel) other than silver. Salt.

[0143]

[0144] A single-crystal silicon wafer subjected to an alkaline texture treatment was prepared, and the aluminum paste was applied to the entire back surface (the surface opposite to the light-receiving surface) by screen printing, and dried at 150° C. for 15 minutes.

[0145] Next, as an antireflection film, a silicon nitride film was formed on the surface (light-receiving surf...

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Abstract

The purpose of the present invention is to provide an electroconductive composition for forming a solar cell collector electrode whereby a solar cell can be obtained that exhibits a high fill factor over a wide firing temperature range (700 to 800°C), and to provide a solar cell that uses this composition. This electroconductive composition for forming a solar cell collector electrode contains electroconductive particles (A), a fatty acid silver salt (B), a glass frit (C), a solvent (D), and a metal compound (E) composed of ionic bonds and / or coordinate bonds between a metal other than silver and an organic compound other than the fatty acid of the fatty acid silver salt (B), wherein the mass ratio (B / E) of the fatty acid silver salt (B) content to the metal compound (E) content is 1 or greater.

Description

technical field [0001] The present invention relates to a conductive composition for forming a solar battery collecting electrode and a solar battery unit. Background technique [0002] As people's attention to global environmental issues is increasing, people are actively developing solar cells with various structures and configurations that convert light energy such as sunlight into electrical energy. Among them, solar cells using semiconductor substrates such as silicon are most commonly used due to their advantages in conversion efficiency and manufacturing cost. [0003] As a material for forming such a solar cell electrode, for example, Patent Document 1 describes "a conductive paste for a solar cell electrode, which contains an organic binder, a solvent, conductive particles, glass frit, metal oxide, and a substance that changes into a gas in the temperature range of 150 to 800°C" ([claim 1]), as the substance that changes into a gas, an organometallic compound is de...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/0224H01B1/22
CPCY02E10/52H01B1/22H01L31/022425Y02E10/50
Inventor 佐藤奈央石川和宪
Owner YOKOHAMA RUBBER CO LTD