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Coating agent for solar cell module, and solar cell module and production method for the solar cell module

A technology of solar cells and coating agents, applied in photovoltaic modules, circuits, photovoltaic power generation, etc., can solve the problems of unfavorable cost and high resin price, and achieve the effects of low cost, excellent weather resistance and excellent wear resistance.

Inactive Publication Date: 2012-05-23
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the film mainly made of fluororesin, the price of the resin itself is high, and it must be made with a special solvent
Therefore, the application of these films as anti-reflection films for solar cell modules is disadvantageous mainly in terms of cost.

Method used

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  • Coating agent for solar cell module, and solar cell module and production method for the solar cell module
  • Coating agent for solar cell module, and solar cell module and production method for the solar cell module
  • Coating agent for solar cell module, and solar cell module and production method for the solar cell module

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0030] The coating agent for solar cell modules (hereinafter simply referred to as "coating agent") of the present embodiment is obtained by dispersing silica fine particles (A) and low-refractive resin particles (B) in an aqueous medium.

[0031] Silica microparticles (A) form a porous silica film by applying a coating agent and drying them. This silicon dioxide film is transparent because it has minute voids. In addition, since the refractive index of the silicon dioxide film is as low as that of the low-refractive-index particles (B) (SiO 2 Refractive index: 1.45, refractive index of a silica film with a porosity of 20%: about 1.35), so it is possible to lower the refractive index of the coating film (anti-reflection film) formed from this coating agent.

[0032] The average particle diameter of the silica fine particles (A) is 15 nm or less, preferably 12 nm or less, more preferably 4 nm or more and 10 nm or less when dispersed in water and measured using a dynamic light ...

Embodiment approach 2

[0066] The solar cell module of this embodiment has an antireflection film formed of the above-mentioned coating agent on the light-receiving surface side surface.

[0067] An example of the solar cell module according to the present embodiment will be described below with reference to the drawings.

[0068] figure 1 It is a sectional view showing the basic structure of the solar cell module of this embodiment. figure 1Among them, the basic structure of the solar battery module is composed of a plurality of solar battery cells 1 arranged at predetermined intervals, a wiring 2 connecting the plurality of solar battery cells 1, and a transparent resin enclosing the solar battery cells 1 and the wiring 2 as a whole. 3. A protective glass 5 formed on the transparent resin 3 on the light-receiving side, a protective film 4 formed on the transparent resin 3 on the opposite side, and an antireflection film 6 formed on the protective glass 5 . Furthermore, the end portion of the bas...

Embodiment approach 3

[0081] In the method of manufacturing a solar cell module according to the present embodiment, the antireflection film 6 is formed at room temperature using the above-mentioned coating agent.

[0082] formed with figure 2 In the case of the antireflection film 6 of the above structure, the above-mentioned coating agent can be coated on the light-receiving side surface of the solar cell module (ie, the cover glass 5), and then dried at room temperature at a predetermined air velocity.

[0083] The coating method of the coating agent is not particularly limited, and a known method can be used. As examples of the coating method, spraying, roll coating, dipping, casting and the like may be cited.

[0084] The coated coating agent is dried at a predetermined air velocity from the viewpoints of prevention of thickness unevenness, improvement of dispersibility of the low-refractive index resin particles (B) 11 , and the like. The air flow that can be used is not particularly limit...

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Abstract

The present invention relates to a coating agent for a solar cell module obtained by dispersing silica fine particles (A) with an average particle diameter of 15 nm or less and low-refractive index resin particles (B) with a refractive index of 1.36 or less in an aqueous medium, in which the solid content is 5% by mass or less, and the mass ratio of the silica fine particles (A) to the low-refractive index resin particles (B) in the solid content (silica fine particles (A) / low-refractive index resin particles (B)) is more than 20 / 80 and less than 70 / 30. The coating agent for a solar cell module is capable of forming an anti-reflection film at room temperature with excellent reflectance-reducing effect, abrasion resistance and weather resistance.

Description

technical field [0001] The present invention relates to a coating agent for a solar cell module, a solar cell module, and a manufacturing method thereof. Background technique [0002] The light-receiving side surface of a solar cell module is generally protected by glass such as tempered glass, and it is known that the transmittance (reflectivity) of the protective glass has a great influence on the photoelectric conversion efficiency. [0003] If the refractive index n of the protective glass is set 2 (n 2 =1.5), the refractive index of air n 1 (n 1 =1), then the reflectance R when the light is perpendicularly incident on the cover glass (R=(n 1 -n 2 ) / (n 1 +n 2 )) up to 4%. Therefore, it is important to reduce the reflectance in the cover glass, and it is necessary to form an antireflection film made of a thin film with a low refractive index on the surface of the cover glass. In addition, if an appropriate thickness (d=λ / 4n 3 , λ = wavelength, n 3 =refractive i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/042
CPCY02E10/52H01L31/02366H01L31/048H02S40/20Y02E10/50
Inventor 吉田育弘山本义则熊田辉彦
Owner MITSUBISHI ELECTRIC CORP