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Light diffusion member for interconnectors, interconnector for solar cells provided with same, and solar cell module

A technology of solar cells and light diffusion, applied in photovoltaic power generation, semiconductor devices, circuits, etc., can solve the problems of failure to effectively use incident light and reduce the power generation efficiency of solar cells, and achieve excellent power generation efficiency, increase power generation efficiency, The effect of increasing the amount of light

Inactive Publication Date: 2017-05-10
TOYO ALUMINIUM KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the case of such an interconnector for solar cells, since it is composed of a flat metal base material, the portion of the interconnector becomes a shadow and blocks light, resulting in a decrease in the power generation efficiency of the solar cell. The main reason
Furthermore, since the solder plating metal itself absorbs visible light, it causes a decrease in reflected light, and there is a disadvantage that incident light cannot be effectively utilized.

Method used

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  • Light diffusion member for interconnectors, interconnector for solar cells provided with same, and solar cell module
  • Light diffusion member for interconnectors, interconnector for solar cells provided with same, and solar cell module
  • Light diffusion member for interconnectors, interconnector for solar cells provided with same, and solar cell module

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0088] A light-diffusing member for an interconnector (hereinafter simply referred to as "light-diffusing member") composed of a 50-μm-thick light-diffusing layer and a 30-μm-thick adhesive layer was fabricated. The light-diffusing layer was melt-kneaded 75 parts by mass of polyethylene resin (LLDPE ULTZEX4020L manufactured by Primeman Polymer Co., Ltd.) and 25 parts by mass of rutile-type titanium oxide (CR-63 manufactured by Ishihara Sangyo Co., Ltd.) with an average particle diameter of 210 nm. And made. In the light-diffusing layer, the content of titanium oxide was 25 wt%. On the other hand, the adhesive layer was produced by melt-kneading an adhesive polyolefin resin ("ADMER LF128" (registered trademark) manufactured by Mitsui Chemicals, Inc.). By co-extruding these light-diffusing layers and adhesive layers, a two-layer co-extruded film in which the light-diffusing layer and the adhesive layer were laminated was obtained as a light-diffusing member. This light-diffusi...

Embodiment 2

[0090] A light-diffusing member was produced in the same manner as in Example 1 except that the thickness of the light-diffusing layer was 100 μm. This light-diffusing member is described as "Ti25%-LE100 / ad30" in Tables 1 and 2 described later.

Embodiment 3

[0092] A light-diffusing member was produced in the same manner as in Example 1 except that the thickness of the light-diffusing layer was 150 μm. This light-diffusing member is described as "Ti25%-LE150 / ad30" in Tables 1 and 2 described later.

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Abstract

Provided are: a light diffusion member for interconnectors, which is capable of increasing the amount of light incident on the surface of a solar cell in comparison to conventional light diffusion members, thereby being able to achieve excellent power generation efficiency; and an interconnector for solar cells, which is provided with this light diffusion member for interconnectors. A light diffusion member 3 for interconnectors is provided with a light diffusion layer 3a which contains a resin and inorganic particles and is arranged on a surface of an interconnector 1 that connects adjacent solar cells 6, said surface being on the reverse side of the solar cell 6-side surface.

Description

technical field [0001] The present invention relates to a light-diffusing member for interconnectors suitable for crystalline silicon solar cells and the like, an interconnector for solar cells equipped with the same, and a solar cell module. Background technique [0002] The solar cell interconnector is used as a wiring material to electrically connect adjacent solar cells to collect electricity in crystalline silicon solar cells and the like. This wiring material is composed of a base material covered with solder on the entire surface, and is obtained by applying a plating layer to a flat metal base material made of copper or the like, and then covering the entire surface of the flat metal base material by solder hot dipping. Forming. [0003] As the above-mentioned base material covered with solder on the entire surface, for example, a component formed by performing tin-bismuth-silver-based solder plating on the surface of a flat copper base material is known, and it is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/05H01L31/054H01L31/055
CPCH01L31/0512H01L31/055H01L31/0547H02S40/22Y02E10/52H01L31/0543
Inventor 藤野刚明前田大辅寺泽孝展
Owner TOYO ALUMINIUM KK