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Aluminum paste composition for perc type solar cell

A technology for solar cells and paste-like compositions, which can be used in circuits, photovoltaic power generation, electrical components, etc., can solve problems such as environmental impact, and achieve the effects of suppressing voids, excellent adhesion, and high conversion efficiency

Active Publication Date: 2019-11-29
TOYO ALUMINIUM KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, since Pb is contained, there is a problem of impact on the environment

Method used

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  • Aluminum paste composition for perc type solar cell
  • Aluminum paste composition for perc type solar cell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0069] Prepared by B 2 O 3 -Bi 2 O 3 -SrO-BaO-Sb 2 O 3 The first glass frit composed of the composition ratio of 43 / 22 / 18 / 12 / 5 (mol%), and V 2 O 5 -BaO-P 2 O 5 -B 2 O 3 -A second glass frit composed of SrO with a composition ratio of 39 / 26 / 18 / 10 / 7 (mol%).

[0070] Using a well-known mixer such as a disperser or three-roller, 1.0 parts by mass of the above-mentioned first glass frit, 2.0 parts by mass of the second glass frit, and 100 parts by mass of aluminum with a D50 of 6.0 μm produced by the gas atomization method Powder, 25 parts by mass of aluminum-15% silicon alloy powder with a D50 of 6.0 μm produced by the gas atomization method, and 35 parts by mass of a resin solution made by dissolving ethyl cellulose in diethylene glycol butyl ether Mixing to prepare a paste composition. It is prepared so that the content of silicon (Si) contained in the paste composition is 3.0 parts by mass (Si / Al amount is 3.0 wt%) relative to 100 parts by mass of aluminum in the paste composition...

Embodiment 2

[0073] It was prepared by adjusting the amount of aluminum powder used so that the content of silicon (Si) contained in the paste composition was 7.0 parts by mass relative to 100 parts by mass of aluminum in the paste composition. , The paste composition was prepared by the same method as in Example 1 to obtain a solar battery cell.

Embodiment 3

[0075] It was prepared by adjusting the amount of aluminum powder used so that the content of silicon (Si) contained in the paste composition was 15.0 parts by mass relative to 100 parts by mass of aluminum in the paste composition. , The paste composition was prepared by the same method as in Example 1 to obtain a solar battery cell.

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PUM

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Abstract

The present invention provides an aluminum paste composition for PERC-type solar cells, which can impart high conversion efficiency to PERC-type solar cells, and at the same time have excellent adhesion to silicon substrates, and can suppress electricity even in high-temperature and high-humidity environments. Decrease in properties and generation of voids after firing. The aluminum paste composition for PERC solar cells contains at least glass frit as a constituent. The glass frit does not contain Pb and alkali metals, but contains B 2 o 3 Element.

Description

Technical field [0001] The present invention relates to an aluminum paste composition for crystalline solar battery cells with a passivation film on the back. Background technique [0002] For the purpose of improving the conversion efficiency (power generation efficiency) and reliability of crystalline solar cells, various research and development have been carried out. One of them is PERC (Passivated Emitter and Rear Cell). cell) type high conversion efficiency cell. In this PERC-type high conversion efficiency cell, an anti-reflection film made of silicon nitride, silicon oxide, aluminum oxide, or the like is formed on the back surface of the solar battery cell on the side opposite to the light-receiving surface. A laser is used to form a hole in the anti-reflection film, and an aluminum electrode layer is formed by making electrical contact with the silicon substrate through the hole. In such a PERC structure, there is a p+ layer formed by the diffusion of aluminum atoms fr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L31/0224C03C8/18H01B1/16H01B1/22H01L31/068
CPCC03C8/18H01B1/16H01B1/22H01L31/0224H01L31/068Y02E10/547H01L31/02167H01L31/022425
Inventor 中原正博马尔万·达姆林松原萌子辻孝辅
Owner TOYO ALUMINIUM KK
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