Solar cell module and method for producing the same

Abstract

A solar cell module which not only can ensure that rays of light in a satisfactory amount enter the solar cells but also can suppress the deterioration of the antireflection film in reflectance to surely achieve excellent durability. By forming, on the surface of a first antireflection film, a second antireflection film having a void ratio smaller than that of the first antireflection film, CO2 and H2O in air are prevented from permeating through the antireflection film, so that a reaction of CO2 and H2O with alkali ions on the surface of a light-transmitting member is unlikely to proceed, making it possible to cause rays of light in a satisfactory amount to surely enter the solar cells and to suppress the deterioration of the antireflection film in reflectance to surely achieve excellent durability.

Description

technical field [0001] The present invention relates to a method of manufacturing a solar battery module including a plurality of solar battery cells provided with an antireflection film, and to a solar battery module. Background technique [0002] In recent years, solar cells have attracted much attention as a clean energy source. In particular, silicon solar cells with high power generation efficiency are actively improving conversion efficiency and reducing costs as the most powerful candidates for high-end markets such as residential buildings. of research. [0003] In such a situation, in order to transmit more sunlight and improve the conversion efficiency, there is known a method of forming an anti-reflection film on the transparent member of the solar cell module and utilizing the refraction with the transparent member. The difference in reflectance is used to reduce the reflectivity, thereby inhibiting the reflection of sunlight at the transmissive member, and inpu...

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Problems solved by technology

[0028] As mentioned above, since the antireflection film formed by the sol-gel method is a porous body having silica particles and a matrix holding the silica particles, H in the atmosphere 2 O.CO 2 Na through the gap of the anti-reflection film reaches the surface of the transparent member and the Na on the surface of the transparent member + Ion reaction, generation of crystals on the surface of the transparent member or dissolution of the surface of the transparent member, or peeling of the interface between the transparent member and the antireflection film or cracks in the antireflection layer due to these factors, long-term Decreased transmittance after storage

In addition, since the antireflection layer formed by the sol-gel method is a porous body having silica particles and a matrix holding the silica particles, especially in rainy days, water and dust permeate into the voids, causing the refractive index to change. High, the transmittance decreases after long-term storage

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