JP2001168365A - Solar battery module - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a solar battery module which can effectively avoid a light pollusion or the like caused by the reflection of light on the light incident side and provide a method of manufacturing the same easily at a low cost. SOLUTION: The solar battery module comprises a transparent insulation substrate 1 having a first and a second surface, a transparent electrode layer 2 formed on the first surface of the substrate 1, an optical semiconductor layer 3 formed on the electrode layer 2, a rear-face electrode layer 4 formed on the optical semiconductor layer 3, and a glare shielding film 10 having an uneven surface texture which is formed on the light incident second surface of the substrate 1. A 60 deg. glossiness of the light receiving surface of the solar battery module having the uneven surface texture is 60 or below.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a solar cell module, and more particularly to a solar cell module used for photovoltaic power generation.

[0002]

2. Description of the Related Art In recent years, the use of clean energy has been increasingly called out, and accordingly, the use of solar cells has been promoted. Further, along with mass production of solar cells, reduction of manufacturing costs is progressing. In the past, the main forms of solar cell utilization were the form of solar cell power plants arranged in large scale and the form for securing power in remote areas. However, in recent years, it has become mainstream to generate electric power by attaching a solar cell module panel to a roof of a house or an outer wall of a building in an urban area, and use that energy in the same way as conventional electric power companies.

In such a solar cell module panel, a plurality of photovoltaic elements are sealed with a resin between a front cover glass and a back cover film. As a front cover glass, a transparent glass having a mirror surface was used, and thus a problem of light pollution occurred. In order to solve this problem, for example, use of a template glass formed by pressing a glass to form a unique shape on the surface has been studied. Also, Japanese Patent Application Laid-Open No. 11-74552 discloses that
A technique for forming an uneven shape on a light incident surface of a glass substrate has been disclosed.

On the other hand, as a structure for greatly reducing the cost of the solar cell module, a transparent electrode layer, a semiconductor layer, and a back electrode layer are sequentially patterned on a transparent insulating substrate of the same size as the front cover glass from the light incident side. A substrate-integrated thin-film solar cell module obtained by formation has been proposed. The feature of this structure is that no sealing resin is required to be filled between the wiring of each photovoltaic element and between the element and the cover glass. Energy loss,
In addition, there is no characteristic deterioration due to yellowing of the resin.

FIG. 11 is a sectional view showing a schematic structure of an example of a conventional solar cell module.

Referring to FIG. 11, this solar cell module comprises a transparent insulating substrate 1, a transparent electrode layer 2 formed on a surface of the transparent insulating substrate 1 different from the light incident surface, and a transparent electrode layer 2
The semiconductor device includes an optical semiconductor layer 3 formed thereon and a back electrode layer 4 formed on the optical semiconductor layer 3. The optical semiconductor element 5 configured by sequentially laminating the transparent electrode layer 2, the optical semiconductor layer 3, and the back electrode layer 4 is divided into a plurality of regions, and each region is electrically connected to each other in series or in parallel. I have.

The solar cell module is sealed and protected by a filling resin 6 and a back cover film 7 to protect the optical semiconductor element 5. Further, a frame 8 is attached to the solar cell thus sealed.

The manufacturing process of the conventional solar cell module configured as described above includes a laser processing process and the like in addition to a film forming process such as plasma CVD and sputtering. Therefore, in the conventional solar cell module, the surface on the light incident surface side of the transparent insulating substrate 1 is generally formed as a flat surface in order to stably perform these steps.

[0009]

However, when the conventional solar cell module configured as described above is arranged on a roof or an outer wall of a building, sunlight is reflected depending on the angle between the sun and the solar cell module. Some people pointed out the problem of light pollution such as illuminating the inside of an adjacent house.

Therefore, in order to solve such a problem,
As described above, it has been studied to make the surface of the substrate into a template glass that scatters light.However, when such a glass is used, detailed examination of the texture specification of the template glass or special laser processing conditions are required, There is a problem that the cost is increased accordingly.

Further, as disclosed in Japanese Patent Application Laid-Open No. H11-74552, when forming irregularities on the glass substrate itself, the processing of the glass requires the use of a high-temperature or highly reactive solution of hydrofluoric acid or the like. As a result, there is a problem that it cannot be performed after completion of the module. In addition, if the glass substrate itself is processed before the module is manufactured, there is a problem that the laser cut of the semiconductor layer and the electrode layer cannot be performed from the glass substrate surface. Further, as a method of forming the irregular shape on the glass substrate, blasting can be considered, but there is a problem that the strength of the glass is weakened.

On the other hand, in the production of the conventional solar cell module, there is a problem that the color tone of the glass substrate varies depending on the lot, so that the color tone also differs in the completed solar cell module.

An object of the present invention is to solve the above-mentioned problems and to provide a solar cell module in which light pollution and the like due to reflection of light on the light incident side are effectively prevented and the color tone is unified.

[0014]

SUMMARY OF THE INVENTION A solar cell module according to the present invention is a solar cell module including a transparent substrate, a semiconductor photoelectric conversion layer, a filling resin, and a back cover. It is covered with the anti-glare film to be scattered or processed so as to have an uneven surface texture itself, and the light receiving surface of the solar cell module having the anti-glare film or the uneven surface texture has a 60 ° gloss of 60 °. It is characterized as follows.

The solar cell module according to the present invention includes both a thin-film solar cell module and a crystalline solar cell module.

More preferably, the light receiving surface of the solar cell module having an antiglare film or an uneven surface texture is formed.
The glossiness is preferably 45 or less, more preferably 35 or less, and further preferably 20 or less.

Preferably, the light receiving surface of the solar cell module having an anti-glare film or an uneven surface texture is provided.
The glossiness is 20 or less, more preferably 15 or less, further preferably 10 or less, and further preferably 5 or less.

Preferably, the uneven surface texture is covered with an antifouling film for maintaining or flattening the unevenness.

[0019]

FIG. 1 is a sectional view showing a schematic configuration of a solar cell module according to a first embodiment of the present invention. In each drawing of the present application, the dimensional relationship is appropriately changed for clarification and simplification of the drawing, and does not reflect the actual dimensional relationship. In particular, fine irregularities on the surface of the antiglare film are exaggerated.

Referring to FIG. 1, this solar cell module includes a transparent insulating substrate 1, a transparent electrode layer 2 formed on a surface of the transparent insulating substrate 1 different from the light incident surface, and a transparent electrode layer 2 formed on the transparent electrode layer 2. The semiconductor device includes the formed optical semiconductor layer 3 and the back electrode layer 4 formed on the optical semiconductor layer 3. The optical semiconductor element 5 configured by sequentially laminating the transparent electrode layer 2, the optical semiconductor layer 3, and the back electrode layer 4 is divided into a plurality of regions, and the respective regions are electrically connected to each other in series or in parallel. .

The solar cell module is sealed and protected by a filling resin 6 and a back cover film 7 to protect the optical semiconductor element 5. further,
The solar cell thus sealed includes a transparent insulating substrate 1,
A frame 8 used to hold the filling resin 6 and the back cover film 7 and the like and to be attached to a frame such as a roof is attached. However, the presence or absence of a frame is not limited, and may be a frameless frame or a tile embedded, and is not limited.

Further, on the light incident surface side of the transparent insulating substrate 1, an antiglare film 10 containing an organic binder and organic particles, which is a feature of the present invention, is provided via a film 40 made of an interface treatment agent. Is formed. The surface of the anti-glare film 10 has an uneven shape. Further, a surface protection film 50 having a flat surface is further formed on the surface of the antiglare film 10 on which the uneven shape is formed.

The anti-glare film 10 may be a film that irregularly reflects light incident from the light incident surface side, or may be a film that improves the transmittance of incident light and reduces the amount of light that is reflected. .

More specifically, a material containing an organic material binder and organic material particles, a material containing an organic material binder and inorganic material particles, a material containing an inorganic material binder and organic material particles, an inorganic material binder and an inorganic material And the like containing particles.

The characteristics of the resin which can be used as the organic binder constituting the anti-glare film 10 include sufficient weather resistance, good light transmittance, and deterioration of the solar cell element during the film forming process. Temperature to avoid, specifically 200
A material that forms a film at a temperature of 150 ° C. or less, more preferably 150 ° C. or less, is preferably used.

As the organic material binder used in the present invention, an acrylic resin, a fluorine resin, a mixed resin thereof, or a resin containing these resins or the mixed resin is used.

The resin or resin mixture is not particularly limited as long as it satisfies the above-mentioned characteristics. However, the acrylic resin, the fluorine resin, or the mixed resin thereof is not less than 50% by weight in the binder resin. The content is preferably 80% by weight or more, more preferably 95% by weight or more.

The acrylic resin is preferably a resin obtained by polymerizing or copolymerizing a monomer containing an acrylic monomer as a main component, and the fluororesin is preferably a resin obtained by polymerizing using a fluorine-containing monomer.

Further, as the acrylic resin, a resin containing a hydrolyzable silyl group is preferable, and the main chain substantially consists of a polyvinyl type bond, and one or more silicon atoms bonded to the terminal or side chain with the hydrolyzable group are preferred. A silyl group-containing vinyl resin having at least one in the molecule, which is obtained by copolymerization of a vinyl monomer and a hydrolyzable silyl group-containing monomer, and may partially include a urethane bond or a siloxane bond in a main chain or a side chain. . The vinyl monomer is not particularly limited, and may be methyl (meth) acrylate, ethyl (meth) acrylate, butyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, stearyl (meth) acrylate, benzyl (meth) acrylate, cyclohexyl (meth) ) Crylate, trifluoroethyl (meth) acrylate, pentafluoropropyl (meth) acrylate, polycarboxylic acid (maleic acid, fumaric acid, itaconic acid, etc.)
Esters of unsaturated carboxylic acids such as diesters or half-esters with linear or branched alcohols having 1 to 20 carbon atoms; styrene, a-methylstyrene, chlorostyrene, styrenesulfonic acid, 4-hydroxystyrene,
Aromatic hydrocarbon vinyl compounds such as vinyl toluene; vinyl esters and allyl compounds such as vinyl acetate, vinyl propionate and diallyl phthalate; nitrile group-containing vinyl compounds such as (meth) acrylonitrile; epoxy such as glycidyl (meth) acrylate Group-containing vinyl compounds; amino group-containing vinyl compounds such as dimethylaminoethyl (meth) acrylate, diethylaminoethyl (meth) acrylate, vinylpyridine, and aminoethyl vinyl ether;
(Meth) acrylamide, itaconic acid diamide, a-ethyl (meth) acrylamide, crotonamide, maleic acid diamide, fumaric acid diamide, N-vinylpyrrolidone,
Amide group-containing vinyl compounds such as N-butoxymethyl (meth) acrylamide, N, N-dimethylacrylamide, N-methylacrylamide, and acryloylmorpholine;
2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, 2-hydroxyethyl vinyl ether, N-methylol (meth) acrylamide, Alonix 5700 (manufactured by Toagosei Co., Ltd.), Placce
l FA-1, Placcel FA-4, Placcel FM-1, Placcel FM-4
(Including those produced by Daicel Chemical Industries, Ltd.); (meth) acrylic acid, maleic acid, fumaric acid, itaconic acid and salts thereof (alkali metal salts, ammonium salts, amine salts, etc.), maleic anhydride And other vinyl compounds such as vinyl methyl ether, vinyl chloride, vinylidene chloride, chloroprene, propylene, butadiene, isoprene, maleimide, N-vinylimidazole, and vinyl sulfonic acid. Is mentioned.

Specific examples of the alkoxysilane vinyl monomer include:

[0031]

Embedded image And the like.

These alkoxysilane vinyl monomer units are preferably 5 to 90% by weight, more preferably 20% by weight, of the vinyl copolymer having a hydrolyzable silyl group.
-80% by weight, particularly preferably 30-70% by weight.

The method for producing a copolymer of an alkoxysilane vinyl monomer and a vinyl monomer is described in, for example, JP-A-54-36395, JP-A-57-36109, and JP-A-58-36109.
157810 or the like may be used. Solution polymerization using an azo radical initiator such as azobisisobutyronitrile is most preferred. If necessary, n-dodecyl mercaptan, t-dodecyl mercaptan, n-butyl mercaptan, γ-mercaptopropyltrimethoxysilane, γ-mercaptopropyltriethoxysilane, γ-mercaptopropylmethyldimethoxysilane,
γ-mercaptopropylmethyldiethoxysilane, (H
_{3 CO) 3 Si-S-} S-Si (OCH 3) 3, (CH
_The molecular weight can be controlled by using a chain transfer agent such as ₃ O) ₃ Si—S ₈ —Si (OCH ₃ ) ₃ . In particular, when a chain transfer agent having a hydrolyzable silyl group in the molecule, for example, γ-mercaptopropyltrimethoxysilane, a hydrolyzable silyl group can be introduced into the terminal of the vinyl copolymer containing a silyl group. Polymerization solvents include hydrocarbons (toluene, xylene, n-hexane, cyclohexane, etc.), acetates (ethyl acetate, butyl acetate, etc.), alcohols (methanol, ethanol, isopropanol, n
Non-reactive solvents such as butanol, ethers (ethyl cellosolve, butyl cellosolve, cellosolve acetate, etc.), ketones (methyl ethyl ketone, ethyl acetoacetate, acetylacetone, diacetone alcohol, methyl isobutyl ketone, acetone, etc.) There is no particular limitation.

The fluorine-based resin further includes a hydroxyl group.
It is preferable that the resin
An example of a hydroxyl group-containing fluorocopolymer is chlorotoluene.
Trifluoroethylene, tetrafluoroethylene, trif
Fluoroolefins such as fluoroethylene; CH_Two= CH
COOCH_TwoCF_Three, CH_Two= C (CH_Three) COOCH_TwoC
F_Three, CH_Two= CHCOOCH (CF_Three)_Two, CH_Three= C
(CH_Three) COOCH (CF _Three)_Two, CH_Two= CHCOOC
H_TwoCF_TwoCF_TwoCF_Three, CH_Two= CHCOOCF_Three, CH_Two
= C (CH_Three) COOCH_TwoCF_TwoCF_TwoCF_Three, CH_Two= C
(CH_Three) COOCF _Three(Meth) acrylic acid full including
Fluoro-containing vinyl monomers such as oloalkyl, hydro
Xylethyl vinyl ether, hydroxypropyl vinyl
Ether, hydroxybutyl vinyl ether, hydroxy
Hydroxyalkyl vinyl such as sihexyl vinyl ether
Ether; 2-hydroxyethyl acrylate, 2-
Hydroxyethyl methacrylate, 2-hydroxypro
Pill acrylate, 2-hydroxypropyl methacrylate
N-methylol acrylamide, N-methylol
Methacrylamide, Aronix 5700 (Toa Gosei
Co., Ltd.), Placcel FA-1, FA-4, FM-1, FM-4
(Including those manufactured by Daicel Chemical Co., Ltd.)
Nomer, ethyl vinyl ether, propyl vinyl A
Alkyl vinyl ethers such as ter and butyl vinyl ether
Cyclohexyl vinyl ether; maleic acid, fuma
Acrylic acid, acrylic acid, methacrylic acid, carboxylic acid
Carboxyl-group-containing monomers such as kyl vinyl ether;
Ethylene, propylene, vinyl chloride, vinylidene chloride,
Vinyl acetate; methyl methacrylate, methyl acrylate, etc.
Unsaturated carboxylic acid ester of vinyltriethoxysila
Γ- (meth) acryloyloxypropyltrimeth
Hydrolyzable silyl group-containing monomers such as xysilane;
The hydroxyl value obtained by copolymerizing
mgKOH / g, preferably 10-250 mgKOH / g
g.

Examples of the resin containing a hydrolyzable silyl group include Zemurac (registered trademark) manufactured by Kaneka Corporation.
Examples of the hydroxyl group-containing fluororesin or resin composition include Lumiflon and Bonflon manufactured by Asahi Glass Coat and Resin Co., Ltd., New Gamet manufactured by Toube Co., Ltd., and V Freon manufactured by Dainippon Paint Co., Ltd. (all are registered trademarks).

Lumiflon has the following basic physical properties.

[0037]

[Table 1] Zemrak has the molecular structure shown below.

[0038]

Embedded image (Wherein, R ₁ is an alkyl group having 1 to 10 carbon atoms, R ₂ is a hydrogen atom or a monovalent hydrocarbon group selected from the group consisting of an alkyl group having 1 to 10 carbon atoms, an aryl group and an aralkyl group, a represents 0, 1 or 2) Further, as the inorganic material binder constituting the anti-glare film 10, a general formula:

[0039]

Embedded image (Wherein, R ₃ is a monovalent hydrocarbon group selected from an alkyl group having 1 to 10 carbon atoms, an aryl group and an aralkyl group;
R ₄ is a monovalent hydrocarbon group selected from an alkyl group, an aryl group and an aralkyl group having 1 to 10 carbon atoms, and b represents 0 or 1) and / or a partial hydrolytic condensation thereof. Object is used.

In the above general formula, R ₃ has 1 to 1 carbon atoms.
0 alkyl group, preferably an alkyl group having 1 to 4 carbon atoms, an aryl group, preferably an aryl group having 6 to 9 carbon atoms and an aralkyl group, preferably a monovalent aralkyl group having 7 to 9 carbon atoms. R ₄ is an alkyl group having 1 to 10 carbon atoms, preferably an alkyl group having 1 to 4 carbon atoms, an aryl group, preferably an aryl group having 6 to 9 carbon atoms and an aralkyl group, preferably 7-9
Is a monovalent hydrocarbon group selected from aralkyl groups.
B is 0 or 1, that is, (R ₃
O) There are 3 to 4 groups. Incidentally, 3-4 present in the same molecule (R ₃ O) groups may be the same or different.

The above R ₃ or R ₄ has 1 to 10 carbon atoms.
Alkyl group, preferably an alkyl group having 1 to 4 carbon atoms,
Specific examples of the aryl group having 6 to 9 carbon atoms and the aralkyl group having 7 to 9 carbon atoms include a methyl group, an ethyl group, an n-propyl group, an i-propyl group, an n-butyl group, an i-butyl group, and a t-group. -Butyl group, phenyl group, benzyl group and the like.

Specific examples of the silicon-containing compound include, for example, tetramethyl silicate, tetraethyl silicate, tetra-n-propyl silicate,
Tetraalkyl silicates such as i-propyl silicate, tetra-n-butyl silicate, tetra-i-butyl silicate and tetra-t-butyl silicate; methyltrimethoxysilane, methyltriethoxysilane, octadecyltriethoxysilane, methyltri-sec- Alkyltrialkoxysilanes such as octyloxysilane, methyltriisopropoxysilane and methyltributoxysilane; aryltrialkoxysilanes such as phenyltrimethoxysilane and phenyltriethoxysilane; alkyltriaryloxysilanes such as methyltriphenoxysilane; -Trialkoxysilanes such as glycidoxytrialkoxysilanes such as glycidoxypropyltrimethoxysilane and triaryloxysilanes. That.

As the partially hydrolyzed condensate of the silicon-containing compound, for example, water is added to the above-mentioned tetraalkyl silicate, trialkoxysilane, triaryloxysilane, etc., and then partially hydrolyzed and condensed. One. As a specific example,
For example, MSI51, ESI40, HAS-1, HAS
-10 (all manufactured by Colcoat Co., Ltd.), such as a partially hydrolyzed condensate of tetraalkyl silicate;
-1 (manufactured by Shin-Etsu Chemical Co., Ltd.) such as trialkoxysilane partially hydrolyzed condensate, TSB4200, TSB43
00, TSB4400, Bellclean and the like.

The MSI 51 is represented by the following formula:

[0045]

Embedded image Is a partially hydrolyzed condensate represented by

As the inorganic binder, a material formed of one or a mixture of two or more of them, a mixture of these, or a mixture containing these or a mixture of these as a main component is used. In addition, the inorganic binder may be one in which organic molecules are added to the inorganic binder molecular structure, one in which inorganic molecules and organic molecules are mixed, or one in which an organic binder is dispersed in an inorganic binder. Good.

It is possible to control the film formation speed by adding a curing catalyst to these binders or inorganic material binders before coating, which is preferable.

As in the case where a resin containing a hydrolyzable silyl group is used as a curing catalyst, specifically, organic resins such as dibutyltin dilaurate, dibutyltin dimalate, dioctyltin dilaurate, dioctyltin dimaleate, tin octylate, etc. Tin compound; phosphoric acid, monomethyl phosphate, monoethyl phosphate, monobutyl phosphate, monooctyl phosphate, monodecyl phosphate, dimethyl phosphate, diethyl phosphate, dibutyl phosphate, dioctyl phosphate,
Phosphoric acid or phosphoric acid ester such as didecyl phosphate; propylene oxide, butylene oxide, cyclohexene oxide, glycidyl methacrylate, glycidol, acrylic glycidyl ether, γ-glycidoxypropyltrimethoxysilane, γ-glycidoxypropyltriethoxysilane, γ-glycidoxypropylmethyldimethoxysilane,

[0049]

Embedded image Cardeura E (Yuka Kasei Co., Ltd.), Epikote 82
No. 8 (manufactured by Yuka Shell), Epicoat 1001 (manufactured by Yuka Shell), and the like, an addition reaction product of an epoxy compound and phosphoric acid and / or a monoacid phosphate; an organic titanate compound; an organic aluminum compound; Maleic acid,
Acidic compounds such as paratoluenesulfonic acid and hydrochloric acid; aliphatic diamines such as ethylenediamine and hexanediamine; diethylenetriamine, triethylenetetramine;
Aliphatic polyamines such as tetraethylenepentamine;
Alicyclic amines such as piperidine and piperazine; other aromatic amines such as metaphenylenediamine; ethanolamines; triethylamine; γ-aminopropyltriethoxysilane; N-β- (aminoethyl) -γ-
Aminopropyltrimethoxysilane; hexylamine,
Amines such as di-2-ethylhexylamine, N, N-dimethyldodecylamine and dodecylamine; reactants of these amines with acidic phosphoric acid esters; alkaline compounds such as sodium hydroxide and potassium hydroxide;
Alkyl mercaptans such as dodecyl mercaptan and tert-butyl mercaptan; mercaptosilanes such as r-mercaptopropyltrimethoxysilane; carboxylic acids such as 2-mercaptopropionic acid, thiosalicylic acid and acetic acid; ester compounds such as 2-ethylhexyl thioglycolate; (Diamond Shamrock Chemicals, polyether with mercapto groups at both ends)
And BT120S (organotin compounds based on Kanebuchi Chemical Industry Co., Ltd.), etc .; and mercapto group-containing compounds such as thiophenol and thiobenzoic acid. Among these curing catalysts, organotin compounds, acid phosphates, amines, reactants of acid phosphates and amines, saturated or unsaturated polycarboxylic acids or acid anhydrides thereof, reactive silicon compounds, An organic titanate compound, an organic aluminum compound or a mixture thereof is preferable, and an organic tin compound or a curing catalyst containing the organic tin compound is particularly preferable. Among them, a curing catalyst using an organotin compound and an amine, and / or a mercapto compound is preferable.

The properties of the resin or the like that can be used as the inorganic binder include sufficient weather resistance, good light transmission, and a temperature at which the solar cell element is not deteriorated in the film forming process. Materials that form a film at a temperature of 200 ° C. or lower, more preferably 150 ° C. or lower are preferably used.

More specifically, as the material of such an inorganic binder, for example, TSB4200, TSB43
00, TSB4400, Bellclean which is further mixed with an organic binder, or the like is preferably used.

"TSB4200", "TSB430"
“0” and “TSB4400” are inorganic varnishes manufactured by TSB. “TSB4200” is mainly composed of ethyl silicate, “TSB4400” is mainly composed of butyl silicate, and “TSB4300” is a mixture of ethyl silicate and butyl silicate. Each of these functions as a heat-resistant insulating material.

"Belclean" is a ceramic paint manufactured by NOF Corporation, which is a composite of a special ceramic component and a highly durable organic component.

On the other hand, as the organic material particles constituting the antiglare film 10, an acrylic resin, a fluorine resin, a polyethylene wax, a mixture of at least two or more of these, or a mixture of these resins or mixed resins is used. What is used as a main component is used. Specifically, for example, Sekisui Chemical's MBX-8 made of PMMA (polymethyl methacrylate) having a diameter of φ8 μm, an average diameter of φ15 μm,
For example, SE480-10T manufactured by Kusumoto Kasei consisting of PE (polyethylene) having a maximum diameter of 30 μm is used.

As the inorganic material particles constituting the anti-glare film 10, those made of silica are used. Specifically, for example, TS100 manufactured by Degussa Japan made of silica of φ4 μm, Degussa OK-607 manufactured by Degussa Japan made of silica of φ2 μm, and EG-ST manufactured by Nissan Chemical Industries, Ltd. made of silica sol of φ0.07 to 0.1 μm
-ZL or the like is used.

The diameter of the organic or inorganic particles is
Preferably 0.05 to 200 μm, more preferably 0.1 to 200 μm.
It is good to be 5-100 μm, particularly preferably 1-10 μm. If the diameter of the particles is in this range, the degree of reflection can be reduced.

The mixing weight ratio between the organic or inorganic binder and the organic or inorganic particles is 50 to 2000 when the particle diameter of the organic or inorganic particles is less than 1 μm.
Particularly, 100 to 1500 is preferable.

The particle size of the organic or inorganic material is 1 μm.
As described above, when the thickness is preferably 1 to 10 μm, the mixing weight ratio of the organic material or the inorganic material binder to the organic material or the inorganic material particles is 0.1 to 98, more preferably 1 to 50, and especially 1 to 50.
To 10 are preferred. If the particle size is small, the antiglare effect of the present invention is not sufficiently exhibited, and if the particle size is large, dispersibility in the binder resin is undesirably reduced.

The thickness of the anti-glare film 10 is 0.1 to 50.
0 μm, further 0.5 to 100 μm, especially 1 to 30 μm
m is preferable.

FIG. 2 is a cross-sectional view showing, on an enlarged scale, a portion of the antiglare film 10 as an example of the solar cell module according to the present invention.

Although not shown, these anti-glare films may be a single layer, or an anti-glare effect or transmission can be obtained by superimposing anti-glare films of different materials, shapes and thicknesses in multiple layers. In some cases, it is effective to increase the rate.

In the anti-glare film 10 of this solar cell module, as shown in FIG. 2, an organic or inorganic material particle 30 is disposed in a single layer in an organic or inorganic material binder 20. With such a structure, a decrease in transmittance can be prevented.

FIG. 3 is a cross-sectional view showing, on an enlarged scale, a portion of the antiglare film 10 of another example of the solar cell module according to the present invention.

In the antiglare film 10 of this solar cell module, as shown in FIG. 3, organic or inorganic material particles 30 are arranged in multiple layers in an organic or inorganic material binder 20. With such a structure, the antiglare effect can be increased.

The layer of the organic or inorganic particles may have a single layer or multiple layers on the entire surface of the formed antiglare film, or a mixture of the single layer and multiple layers.

By forming the anti-glare film on the light incident surface side of the transparent insulating substrate in this way, the sunlight incident on the solar cell module contributes to power generation for the most part and is reflected from the surface. About 2 to 4% of the incident light is reflected in an unspecified direction. The diffusely scattered sunlight is not a parallel ray. Therefore, the light reflected from the solar cell module is in a blurred state as a whole, and does not feel dazzling even when directly looking at the solar cell.

In the solar cell module according to this embodiment, the transparent electrode layer 2 is made of ITO, Sn
A material that can transmit light, such as O ₂ , or a laminate of these materials, such as ITO / SnO ₂ or ZnO, is used.

The optical semiconductor layer 3 is made of amorphous silicon a
-Si, hydrogenated amorphous silicon a-Si: H, hydrogenated amorphous silicon carbide a-SiC: H, amorphous silicon nitride, etc., and other elements such as silicon and carbon, germanium, tin, etc. An amorphous or microcrystalline amorphous silicon-based semiconductor made of an alloy of
A semiconductor layer synthesized into an ni type, pn type, MIS type, heterojunction type, homojunction type, Schottky barrier type, or a combination thereof is used. In addition, the optical semiconductor layer may be a CdS-based, GaAs-based, InP-based, or the like, and is not limited at all.

As the back electrode layer 4, a metal or a composite film of a metal and a metal oxide is used.

Further, as the filling resin 6, silicon,
Ethylene vinyl acetate, polyvinyl butyral, or the like is used. As the back cover film 7, a fluorine-based resin film, a metal film such as polyethylene terephthalate or aluminum, or a film having a multilayer structure in which a thin film such as SiO ₂ is laminated is used. .

In this embodiment, a thin-film solar cell module will be described. However, it goes without saying that the present invention can be applied to a crystalline solar cell module.

Next, a method for manufacturing the solar cell module of the first embodiment shown in FIG. 1 will be described.

First, a transparent electrode layer 2, an optical semiconductor layer 3, and a back electrode layer 4 are sequentially formed on a surface of the transparent insulating substrate 1 different from the light incident surface. Each of these layers is separated into a plurality of regions by patterning means such as laser scribe. For example, the transparent electrode layer 2 is formed in a predetermined pattern shape by a method such as laser processing, etching, and lift-off. The back electrode layer 4 is formed into a predetermined pattern by laser processing, etching, lift-off, or the like after forming the film by vapor deposition or sputtering.

After the optical semiconductor element 5 including the transparent electrode layer 2, the optical semiconductor layer 3 and the back electrode layer 4 is formed on the transparent insulating substrate 1 as described above, it is sealed with a filling resin 6 to protect these. Then, the back cover film 7 is attached.

Subsequently, an antiglare film 10 which is a feature of the present invention is formed on the light incident surface side of the transparent insulating substrate 1 on which the optical semiconductor element 5 is formed.

The anti-glare film can be formed at any time after the formation and scribing of the second electrode layer. The anti-glare film can be formed immediately after, after sealing the back surface, after attaching the terminal box, after installing on the roof or the like. Although it depends on the method, it is not particularly limited.

At this time, a film 40 made of an interfacial treatment agent may be interposed between the transparent insulating substrate 1 and the anti-glare film 10.
By interposing such a film 40, the adhesive strength between the transparent insulating substrate 1 and the anti-glare film 10 is increased, and the coating unevenness is reduced.

In this embodiment, the antiglare film 10 is formed after the optical semiconductor element 5 is formed. Conversely, if the optical semiconductor element 5 is formed after the formation of the antiglare film 10, if laser irradiation is performed during the formation of the optical semiconductor element 5, the problem of blurring of the focus or the formation of the optical semiconductor element 5 may occur. This is because there is a possibility that a problem that the vacuum chamber cannot be used may occur.

FIGS. 4 and 5 are cross-sectional views illustrating an example of a method for manufacturing a solar cell module according to the present invention, and are diagrams illustrating an example of a method for forming the antiglare film 10.

First, referring to FIG. 4, an organic or inorganic binder resin 20 mixed with organic or inorganic particles 30 is placed on the light incident surface of transparent insulating substrate 1 of the sealed solar cell module. Is applied.

At this time, when the size of the particles 30 is large, as shown in FIG. 5, when the binder resin 20 is formed, an uneven shape is formed on the surface of the antiglare film 10 due to the distribution of the particles 30. You.

FIG. 6 is a cross-sectional view for explaining another example of the method for manufacturing the solar cell module according to the present invention, and is a view showing another example of the method for forming the anti-glare film 10.

Referring to FIG. 6, after applying an organic or inorganic binder resin 20, the roller 9 around which a cloth having a predetermined pattern is wound is rotated as indicated by the arrow A while the arrow B is rotated. After transferring a predetermined pattern by moving as shown in (1), the binder resin 20 is formed into a film, whereby an uneven shape can be formed on the surface of the anti-glare film 10.

As a method of forming an uneven shape on the light incident surface of the anti-glare film 10, a method utilizing the action of the mixed particles as described above, or a method of applying a binder resin and molding by embossing or the like is used. In addition to the method of forming the film after the formation, the surface can be formed in an uneven shape by devising the shape of the nozzle when applying the binder resin.

In this embodiment, a surface protection film 50 having a further flat surface is formed on the surface of the anti-glare film 10 having an uneven surface. By forming such a surface protective film 50, it is possible to effectively prevent dust from collecting on the surface and lowering the photoelectric conversion rate.

FIG. 7 is a schematic sectional view showing a part of a thin-film solar cell module as still another example of the embodiment of the present invention.

In the thin-film solar cell module shown in FIG. 7, instead of a glass substrate having a surface having fine irregularities as disclosed in JP-A-11-74552, a glass plate having flat both surfaces is used. It is used as a transparent insulating substrate 1 also serving as a cover glass.

On a lower surface of the transparent insulating substrate 1, a transparent electrode layer 2 made of a known TCO such as SnO ₂ , an optional well-known semiconductor thin film photoelectric conversion layer 3 made of a silicon or the like, and Ag
A well-known back electrode layer 4 composed of the above-described components is sequentially laminated.
These layers 2, 3, and 4 are each divided into a plurality of elongated strip-shaped regions by a transparent electrode dividing groove 2a, a semiconductor layer dividing groove 3a, and a back electrode dividing groove 4a extending in a direction perpendicular to the paper surface of FIG. Have been. Among these plural regions, the strip-shaped transparent electrode 2 which is stacked so as to overlap with each other,
The semiconductor photoelectric conversion layer 3 and the back electrode 4 form one strip-shaped solar cell 5. Then, the transparent electrode 2 of any one cell 5 is connected via the semiconductor layer dividing groove 3a.
It is connected to the back electrode 4 of the cell 5 on the left. That is, the plurality of cells 5 are integrated so as to be electrically connected to each other in series.

The back surfaces of the plurality of integrated cells are sealed by covering the back electrode layer 4 with a well-known filling resin layer 6 and laminating a well-known weather-resistant back cover film thereon. Is protected.

On the other hand, on the upper surface of the transparent insulating substrate 1, a translucent anti-glare film 10 is formed. Fine irregularities suitable for scattering light are formed on the upper surface of the anti-glare film 10. As a material of the anti-glare film 10, an organic polymer, an inorganic polymer, or a composite material thereof can be used. Also, multiple layers of these materials may be used. For example, in order to improve the anti-glare effect by combining materials having different refractive indices, to coat the surface with an inorganic polymer for the purpose of improving surface hardness and wear resistance, and to absorb surface cracks and strains In some cases, an organic polymer is coated on the surface, or a highly water-repellent fluorine resin or water-dispersible inorganic polymer is applied to the surface to prevent contamination.

As the organic polymer used for the antiglare film 10 in the present invention, an acrylic resin, a fluorine resin,
Alternatively, a mixed resin thereof, or a resin containing these resins or the mixed resin may be used.

The resin or the resin mixture is not particularly limited as long as it satisfies the above-mentioned characteristics. However, the acrylic resin, the fluororesin, or the mixed resin thereof is not less than 50% by weight in the organic polymer. , Preferably 80% by weight or more, more preferably 95% by weight or more.

The acrylic resin is preferably a resin obtained by polymerizing or copolymerizing a monomer containing an acrylic monomer as a main component, and the fluororesin is preferably a resin obtained by polymerizing using a fluorine-containing monomer.

The acrylic resin is more preferably a resin containing a hydrolyzable silyl group, and the main chain substantially consists of a polyvinyl type bond, and one or more silicon atoms bonded to the terminal or side chain with the hydrolyzable group are preferred. A silyl group-containing vinyl resin having at least one in the molecule, which is obtained by copolymerization of a vinyl monomer and a hydrolyzable silyl group-containing monomer, and may partially include a urethane bond or a siloxane bond in a main chain or a side chain. . The vinyl monomer is not particularly limited, and may be methyl (meth) acrylate, ethyl (meth) acrylate, butyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, stearyl (meth) acrylate, benzyl (meth) acrylate, cyclohexyl (meth) ) Crylate, trifluoroethyl (meth) acrylate, pentafluoropropyl (meth) acrylate, polycarboxylic acid (maleic acid, fumaric acid, itaconic acid, etc.)
Esters of unsaturated carboxylic acids such as diesters or half-esters with linear or branched alcohols having 1 to 20 carbon atoms; styrene, a-methylstyrene, chlorostyrene, styrenesulfonic acid, 4-hydroxystyrene,
Aromatic hydrocarbon vinyl compounds such as vinyl toluene; vinyl esters and allyl compounds such as vinyl acetate, vinyl propionate and diallyl phthalate; nitrile group-containing vinyl compounds such as (meth) acrylonitrile; epoxy such as glycidyl (meth) acrylate Group-containing vinyl compounds; amino group-containing vinyl compounds such as dimethylaminoethyl (meth) acrylate, diethylaminoethyl (meth) acrylate, vinylpyridine, and aminoethyl vinyl ether;
(Meth) acrylamide, itaconic acid diamide, a-ethyl (meth) acrylamide, crotonamide, maleic acid diamide, fumaric acid diamide, N-vinylpyrrolidone,
Amide group-containing vinyl compounds such as N-butoxymethyl (meth) acrylamide, N, N-dimethylacrylamide, N-methylacrylamide, and acryloylmorpholine;
2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, 2-hydroxyethyl vinyl ether, N-methylol (meth) acrylamide, Alonix 5700 (manufactured by Toagosei Co., Ltd.), Placce
l FA-1, Placcel FA-4, Placcel FM-1, Placcel FM-4
(Including those produced by Daicel Chemical Industries, Ltd.); (meth) acrylic acid, maleic acid, fumaric acid, itaconic acid and salts thereof (alkali metal salts, ammonium salts, amine salts, etc.), maleic anhydride And other vinyl compounds such as vinyl methyl ether, vinyl chloride, vinylidene chloride, chloroprene, propylene, butadiene, isoprene, maleimide, N-vinylimidazole, and vinyl sulfonic acid. Is mentioned.

These alkoxysilane vinyl monomer units are preferably 5 to 90% by weight, more preferably 20% by weight, of the vinyl copolymer having a hydrolyzable silyl group.
-80% by weight, particularly preferably 30-70% by weight.

Methods for producing a copolymer of an alkoxysilane vinyl monomer and a vinyl monomer are described in, for example, JP-A-54-36395, JP-A-57-36109, and JP-A-58-36109.
157810 or the like may be used. Solution polymerization using an azo radical initiator such as azobisisobutyronitrile is most preferred. If necessary, n-dodecyl mercaptan, t-dodecyl mercaptan, n-butyl mercaptan, γ-mercaptopropyltrimethoxysilane, γ-mercaptopropyltriethoxysilane, γ-mercaptopropylmethyldimethoxysilane,
γ-mercaptopropylmethyldiethoxysilane, (H
_{3 CO) 3 Si-S-} S-Si (OCH 3) 3, (CH
_The molecular weight can be controlled by using a chain transfer agent such as ₃ O) ₃ Si—S ₈ —Si (OCH ₃ ) ₃ . In particular, when a chain transfer agent having a hydrolyzable silyl group in the molecule, for example, γ-mercaptopropyltrimethoxysilane, a hydrolyzable silyl group can be introduced into the terminal of the vinyl copolymer containing a silyl group. Polymerization solvents include hydrocarbons (toluene, xylene, n-hexane, cyclohexane, etc.), acetates (ethyl acetate, butyl acetate, etc.), alcohols (methanol, ethanol, isopropanol, n
Non-reactive solvents such as butanol, ethers (ethyl cellosolve, butyl cellosolve, cellosolve acetate, etc.), ketones (methyl ethyl ketone, ethyl acetoacetate, acetylacetone, diacetone alcohol, methyl isobutyl ketone, acetone, etc.) There is no particular limitation.

Further, as the fluorine-based resin, a hydroxyl group
It is preferable that the resin
An example of a hydroxyl group-containing fluorocopolymer is chlorotoluene.
Trifluoroethylene, tetrafluoroethylene, trif
Fluoroolefins such as fluoroethylene; CH_Two= CH
COOCH_TwoCF_Three, CH_Two= C (CH_Three) COOCH_TwoC
F_Three, CH_Two= CHCOOCH (CF_Three)_Two, CH_Three= C
(CH_Three) COOCH (CF _Three)_Two, CH_Two= CHCOOC
H_TwoCF_TwoCF_TwoCF_Three, CH_Two= CHCOOCF_Three, CH_Two
= C (CH_Three) COOCH_TwoCF_TwoCF_TwoCF_Three, CH_Two= C
(CH_Three) COOCF _Three(Meth) acrylic acid full including
Fluoro-containing vinyl monomers such as oloalkyl, hydro
Xylethyl vinyl ether, hydroxypropyl vinyl
Ether, hydroxybutyl vinyl ether, hydroxy
Hydroxyalkyl vinyl such as sihexyl vinyl ether
Ether; 2-hydroxyethyl acrylate, 2-
Hydroxyethyl methacrylate, 2-hydroxypro
Pill acrylate, 2-hydroxypropyl methacrylate
N-methylol acrylamide, N-methylol
Methacrylamide, Aronix 5700 (Toa Gosei
Co., Ltd.), Placcel FA-1, FA-4, FM-1, FM-4
(Including those manufactured by Daicel Chemical Co., Ltd.)
Nomer, ethyl vinyl ether, propyl vinyl A
Alkyl vinyl ethers such as ter and butyl vinyl ether
Cyclohexyl vinyl ether; maleic acid, fuma
Acrylic acid, acrylic acid, methacrylic acid, carboxylic acid
Carboxyl-group-containing monomers such as kyl vinyl ether;
Ethylene, propylene, vinyl chloride, vinylidene chloride,
Vinyl acetate; methyl methacrylate, methyl acrylate, etc.
Unsaturated carboxylic acid ester of vinyltriethoxysila
Γ- (meth) acryloyloxypropyltrimeth
Hydrolyzable silyl group-containing monomers such as xysilane;
The hydroxyl value obtained by copolymerizing
mgKOH / g, preferably 10-250 mgKOH / g
g.

Examples of the resin containing a hydrolyzable silyl group include Zemurac (registered trademark) manufactured by Kaneka Chemical Industry Co., Ltd.
Examples of the hydroxyl group-containing fluororesin or resin composition include Lumiflon and Bonflon manufactured by Asahi Glass Coat and Resin Co., Ltd., New Gamet manufactured by Toube Co., Ltd., and V Freon manufactured by Dainippon Paint Co., Ltd. (all are registered trademarks).

Regarding the properties of the polymer for the anti-glare film 10,
A material that has sufficient weather resistance, has good light transmittance, and cures at a temperature that does not deteriorate the solar battery cell in the curing process, specifically, 200 ° C. or less, more preferably 150 ° C. or less is desired.

The inorganic binder constituting the anti-glare film 10 has a general formula:

[0101]

Embedded image (Wherein, R ₃ is a monovalent hydrocarbon group selected from an alkyl group having 1 to 10 carbon atoms, an aryl group and an aralkyl group;
R ₄ is a monovalent hydrocarbon group selected from an alkyl group, an aryl group and an aralkyl group having 1 to 10 carbon atoms, and b represents 0 or 1) and / or a partial hydrolytic condensation thereof. Object is used.

In the above general formula, R ₃ has 1 to 1 carbon atoms.
0 alkyl group, preferably an alkyl group having 1 to 4 carbon atoms, an aryl group, preferably an aryl group having 6 to 9 carbon atoms and an aralkyl group, preferably a monovalent aralkyl group having 7 to 9 carbon atoms. R ₄ is an alkyl group having 1 to 10 carbon atoms, preferably an alkyl group having 1 to 4 carbon atoms, an aryl group, preferably an aryl group having 6 to 9 carbon atoms and an aralkyl group, preferably 7-9
Is a monovalent hydrocarbon group selected from aralkyl groups.
B is 0 or 1, that is, (R ₃
O) There are 3 to 4 groups. Incidentally, 3-4 present in the same molecule (R ₃ O) groups may be the same or different.

The above R ₃ or R ₄ has 1 to 10 carbon atoms.
Alkyl group, preferably an alkyl group having 1 to 4 carbon atoms,
Specific examples of the aryl group having 6 to 9 carbon atoms and the aralkyl group having 7 to 9 carbon atoms include a methyl group, an ethyl group, an n-propyl group, an i-propyl group, an n-butyl group, an i-butyl group, and a t-group. -Butyl group, phenyl group, benzyl group and the like.

Specific examples of the silicon-containing compound include, for example, tetramethyl silicate, tetraethyl silicate, tetra-n-propyl silicate,
Tetraalkyl silicates such as i-propyl silicate, tetra-n-butyl silicate, tetra-i-butyl silicate and tetra-t-butyl silicate; methyltrimethoxysilane, methyltriethoxysilane, octadecyltriethoxysilane, methyltri-sec- Alkyltrialkoxysilanes such as octyloxysilane, methyltriisopropoxysilane and methyltributoxysilane; aryltrialkoxysilanes such as phenyltrimethoxysilane and phenyltriethoxysilane; alkyltriaryloxysilanes such as methyltriphenoxysilane; -Trialkoxysilanes such as glycidoxytrialkoxysilanes such as glycidoxypropyltrimethoxysilane and triaryloxysilanes. That.

As the partially hydrolyzed condensate of the silicon-containing compound, for example, water is added to the above-mentioned tetraalkyl silicate, trialkoxysilane, triaryloxysilane, etc., and then partially hydrolyzed and condensed. One. As a specific example,
For example, MSI51, ESI40, HAS-1, HAS
-10 (all manufactured by Colcoat Co., Ltd.), such as a partially hydrolyzed condensate of tetraalkyl silicate;
-1 (manufactured by Shin-Etsu Chemical Co., Ltd.) such as trialkoxysilane partially hydrolyzed condensate, TSB4200, TSB43
00, TSB4400, Bellclean and the like.

The MSI 51 is represented by the following formula:

[0107]

Embedded image Is a partially hydrolyzed condensate represented by

As the inorganic binder, a material formed of a single material, a mixture of two or more materials, a mixture thereof, or a material having these or a mixture thereof as a main component is used. In addition, the inorganic binder may be one in which organic molecules are added to the inorganic binder molecular structure, one in which inorganic molecules and organic molecules are mixed, or one in which an organic binder is dispersed in an inorganic binder. Good.

In these inorganic polymers, a film-forming speed until curing may be controlled by adding a curing catalyst before coating.

It is also possible to control the film forming speed by adding a catalyst to the inorganic material binder before the coating in the same manner as in the case of using a resin containing a hydrolyzable silyl group, which is preferable. . Specific examples of the curing catalyst include organic tin compounds such as dibutyltin dilaurate, dibutyltin dimaleate, dioctyltin dilaurate, dioctyltin dimaleate, and tin octylate; phosphoric acid, monomethyl phosphate, monoethyl phosphate, monobutyl phosphate, monooctyl, and the like. Phosphate, monodecyl phosphate, dimethyl phosphate,
Phosphoric acid or phosphoric acid ester such as diethyl phosphate, dibutyl phosphate, dioctyl phosphate, didecyl phosphate; propylene oxide, butylene oxide, cyclohexene oxide, glycidyl methacrylate, glycidol, acrylic glycidyl ether, γ-glycidoxypropyltrimethoxysilane,
γ-glycidoxypropyltriethoxysilane, γ-glycidoxypropylmethyldimethoxysilane,

[0111]

Embedded image Cardeura E (Yuka Kasei Co., Ltd.), Epikote 82
No. 8 (manufactured by Yuka Shell), Epicoat 1001 (manufactured by Yuka Shell), and the like, an addition reaction product of an epoxy compound and phosphoric acid and / or a monoacid phosphate; an organic titanate compound; an organic aluminum compound; Maleic acid,
Acidic compounds such as p-toluenesulfonic acid; aliphatic diamines such as ethylenediamine and hexanediamine; aliphatic polyamines such as diethylenetriamine, triethylenetetramine and tetraethylenepentamine; alicyclic amines such as piperidine and piperazine; Aromatic amines such as phenylenediamine, ethanolamines, triethylamine, γ-aminopropyltriethoxysilane, N-β- (aminoethyl) -γ-aminopropyltrimethoxysilane; hexylamine, di-2-
Amines such as ethylhexylamine, N, N-dimethyldodecylamine and dodecylamine; reactants of these amines with acidic phosphate esters; alkaline compounds such as sodium hydroxide and potassium hydroxide; n-dodecyl mercaptan; Alkyl mercaptans such as butyl mercaptan; mercaptosilanes such as r-mercaptopropyltrimethoxysilane; carboxylic acids such as 2-mercaptopropionic acid and thiosalicylic acid; thioglycolic acid 2
-Ethylhexyl and like ester compounds;
Polymers such as 00 (a polyether having a mercapto group at both ends, manufactured by Diamond Shamrock Chemicals Co., Ltd.), and mercapto group-containing compounds such as thiophenol and thiobenzoic acid; BT120S (organotin compounds based on Kaneguchi Chemical Industry Co., Ltd.) And the like. Among these curing catalysts, organotin compounds, acid phosphates, amines,
A reaction product of an acidic phosphoric acid ester and an amine, a saturated or unsaturated polycarboxylic acid or an acid anhydride thereof, a reactive silicon compound, an organic titanate compound, an organic aluminum compound, or a mixture thereof is preferable, and in particular, an organic tin Curing catalysts containing compounds or organotin compounds are preferred. Among them, a curing catalyst using an organotin compound and an amine, and / or a mercapto compound is preferable.

More specifically, examples of the inorganic polymer for the antiglare film 10 include, for example, T
SB4200, TSB4300, and TSB4400 can be preferably used. These are inorganic varnishes manufactured by TSB. TSB4200 is mainly composed of ethyl silicate, TSB4400 is mainly composed of butyl silicate, and TSB4300 is a mixture of ethyl silicate and butyl silicate. All of them are weather-resistant and heat-resistant.

In addition, Bellclean (registered trademark) in which an organic polymer is further mixed with these acrylic silicates may be used. Bellclean is a ceramic paint manufactured by Nippon Yushi Co., Ltd., which combines a special ceramic component with a highly durable organic component.

The average thickness of the antiglare film 10 is 0.1 to 50.
It is preferably in the range of 0 μm. The reason is that if the thickness of the anti-glare film is 0.1 μm or less, it becomes difficult to form irregularities suitable for light scattering.
If the thickness is more than μm, the translucency of the antiglare film 10 is reduced, and there is a possibility that the light reaching the solar cell 5 may be reduced. The thickness range of the anti-glare film 10 is 0.5 to 100 μm.
m is more preferred, and 1 to 30 μ is even more preferred.

The anti-glare film 10 can be formed on the outer surface of the cover glass 1 after the completion of the solar cell module. However, when the anti-glare film 10 is formed,
It is possible at any time after forming the second electrode layer and scribing it, immediately after, after sealing the back surface, after attaching the terminal box, after installing on the roof, etc., depending on the coating method. Is not particularly limited.

The material for the anti-glare film can be applied to the glass substrate 1 with a predetermined thickness by using, for example, a piano wire coater, spray, screen printing or the like. Then, for example, as shown in FIG.
By using the embossing roller 9 traveling in the direction, fine irregularities can be formed on the surface of the antiglare film 10.
Of course, the formation of such a fine surface unevenness structure is not limited to the embossing roll, but can also be formed by using embossed film transfer, sandblasting, or the like. Since the coating material for the anti-glare film is much softer than the glass substrate 1 before being cured, such an uneven surface forming process is easy without causing any damage to other portions of the solar cell module. Can be performed.

Further, an antifouling film having a smooth surface may be additionally provided on the uneven surface of the antiglare film 10. That is, although the dirt tends to adhere to the fine uneven surface of the antiglare film 10, the dirt on the surface of the solar cell module can be reduced by flattening the uneven surface with the antifouling film. . As a material for such a stain prevention film, the same material as that of the anti-glare film 10 can be used. From the viewpoint of the light scattering effect of the anti-glare film 10, it is preferable that the materials of the stain prevention film and the anti-glare film 10 are formed of different materials. However, the anti-dirt film and the anti-glare film 1
Even if 0 is formed of the same material, the anti-glare film 1 once formed
The uneven surface of 0 forms a clear interface with the antifouling film, and the light scattering effect is maintained by the uneven interface.

When the antifouling film is formed of a fluororesin, its surface has good water repellency, and the adhesion of dust due to rainwater or the like is reduced. On the other hand, when the antifouling film is formed from an alkyl silicate, the chemical resistance of the surface of the solar cell is improved, the hydrophilicity is improved, and even if the antifouling is contaminated, the antifouling film becomes uniform and becomes less noticeable. This produces the effect.

Incidentally, since the above-mentioned polymer material for an anti-glare film has an intermediate refractive index between air and a glass substrate, the anti-glare film 10 has an effect of improving the light transmittance into the solar cell 5. Also occurs. Further, in order to further improve the light transmittance into the solar cell 5, the anti-glare film 10 may be formed to include a plurality of anti-glare sub-layers. These anti-glare sub-layers are preferably formed of materials having different compositions or physical properties. This is because a plurality of sub-layers having different refractive indices can cause a gradient in the refractive index in the anti-glare film 10, thereby further improving the transmittance of light into the solar cell 5. It is.

As a material for the above-mentioned antiglare film 10, an organic polymer is preferred because it is flexible and hard to crack, while an inorganic polymer is preferred because it has high weather resistance and high heat resistance.

Since the anti-glare film 10 formed as described above and the stain prevention film added in some cases cover the entire surface of the glass substrate 1, the difference in the color tone of the glass substrate 1 due to variations among manufacturers and lots. Can be masked, and the color tone between the plurality of solar cell modules arranged on the roof can be unified to enhance the aesthetic appearance.

FIG. 9 is a schematic sectional view showing a part of a thin-film solar cell module as still another example of the embodiment of the present invention.

In the thin-film solar cell module shown in FIG. 9, a glass plate having flat both surfaces is used instead of a glass substrate having a surface having fine irregularities as disclosed in JP-A-11-74552. Is used as the transparent insulating substrate 1 which also functions as a transparent insulating substrate.

On the lower surface of the transparent insulating substrate 1, a transparent electrode layer 2 made of a well-known TCO such as SnO ₂ , an arbitrary well-known semiconductor thin-film photoelectric conversion layer 3 made of silicon or the like, and Ag
A well-known back electrode layer 4 composed of the above-described components is sequentially laminated.
These layers 2, 3, and 4 are each divided into a plurality of elongated strip-shaped regions by a transparent electrode dividing groove 2a, a semiconductor layer dividing groove 3a, and a back electrode dividing groove 4a extending in a direction orthogonal to the paper surface of FIG. Have been. Among these plural regions, the strip-shaped transparent electrode 2 which is stacked so as to overlap with each other,
The semiconductor photoelectric conversion layer 3 and the back electrode 4 form one strip-shaped solar cell 5. Then, the transparent electrode 2 of any one cell 5 is connected via the semiconductor layer dividing groove 3a.
It is connected to the back electrode 4 of the cell 5 on the left. That is, the plurality of cells 5 are integrated so as to be electrically connected to each other in series.

The back surfaces of the plurality of integrated cells are sealed by covering the back electrode layer 4 with a well-known filling resin layer 6 and laminating a well-known weather-resistant back cover film thereon. Is protected.

On the other hand, on the upper surface of the transparent insulating substrate 1, a translucent anti-glare film 10 is formed. An uneven surface texture including fine unevenness suitable for scattering light is formed on the upper surface of the antiglare film 10. Further, on the uneven surface texture of the antiglare film 10, a surface film (dirt prevention film) 11 for flattening the unevenness is formed. Surface film 1
As the first material, an organic polymer, an inorganic polymer, or a composite material thereof can be used.

As the organic polymer used for the surface film 11 in the present invention, an acrylic resin, a fluorine resin,
Alternatively, a mixed resin thereof, or a resin containing these resins or the mixed resin may be used.

The resin or the resin mixture is not particularly limited as long as it satisfies the above-mentioned properties. However, the acrylic resin, the fluororesin, or the mixed resin thereof is not less than 50% by weight in the organic polymer. , Preferably 80% by weight or more, more preferably 95% by weight or more.

The acrylic resin is preferably a resin obtained by polymerizing or copolymerizing a monomer containing an acrylic monomer as a main component, and the fluororesin is preferably a resin obtained by polymerizing using a fluorine-containing monomer.

The acrylic resin is more preferably a resin containing a hydrolyzable silyl group. The acrylic resin has a main chain substantially consisting of a polyvinyl type bond, and one or more silicon atoms bonded to the terminal or side chain with the hydrolyzable group. A silyl group-containing vinyl resin having at least one in the molecule, which is obtained by copolymerization of a vinyl monomer and a hydrolyzable silyl group-containing monomer, and may partially include a urethane bond or a siloxane bond in a main chain or a side chain. . The vinyl monomer is not particularly limited, and may be methyl (meth) acrylate, ethyl (meth) acrylate, butyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, stearyl (meth) acrylate, benzyl (meth) acrylate, cyclohexyl (meth) ) Crylate, trifluoroethyl (meth) acrylate, pentafluoropropyl (meth) acrylate, polycarboxylic acid (maleic acid, fumaric acid, itaconic acid, etc.)
Esters of unsaturated carboxylic acids such as diesters or half-esters with linear or branched alcohols having 1 to 20 carbon atoms; styrene, a-methylstyrene, chlorostyrene, styrenesulfonic acid, 4-hydroxystyrene,
Aromatic hydrocarbon vinyl compounds such as vinyl toluene; vinyl esters and allyl compounds such as vinyl acetate, vinyl propionate and diallyl phthalate; nitrile group-containing vinyl compounds such as (meth) acrylonitrile; epoxy such as glycidyl (meth) acrylate Group-containing vinyl compounds; amino group-containing vinyl compounds such as dimethylaminoethyl (meth) acrylate, diethylaminoethyl (meth) acrylate, vinylpyridine, and aminoethyl vinyl ether;
(Meth) acrylamide, itaconic acid diamide, a-ethyl (meth) acrylamide, crotonamide, maleic acid diamide, fumaric acid diamide, N-vinylpyrrolidone,
Amide group-containing vinyl compounds such as N-butoxymethyl (meth) acrylamide, N, N-dimethylacrylamide, N-methylacrylamide, and acryloylmorpholine;
2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, 2-hydroxyethyl vinyl ether, N-methylol (meth) acrylamide, Alonix 5700 (manufactured by Toagosei Co., Ltd.), Placce
l FA-1, Placcel FA-4, Placcel FM-1, Placcel FM-4
(Including those produced by Daicel Chemical Industries, Ltd.); (meth) acrylic acid, maleic acid, fumaric acid, itaconic acid and salts thereof (alkali metal salts, ammonium salts, amine salts, etc.), maleic anhydride And other vinyl compounds such as vinyl methyl ether, vinyl chloride, vinylidene chloride, chloroprene, propylene, butadiene, isoprene, maleimide, N-vinylimidazole, and vinyl sulfonic acid. Is mentioned.

These alkoxysilane vinyl monomer units are preferably 5 to 90% by weight, more preferably 20 to 90% by weight, of the vinyl copolymer having a hydrolyzable silyl group.
-80% by weight, particularly preferably 30-70% by weight.

The method for producing a copolymer of an alkoxysilane vinyl monomer and a vinyl monomer is described in, for example, JP-A-54-36395, JP-A-57-36109 and JP-A-58-36109.
157810 or the like may be used. Solution polymerization using an azo radical initiator such as azobisisobutyronitrile is most preferred. If necessary, n-dodecyl mercaptan, t-dodecyl mercaptan, n-butyl mercaptan, γ-mercaptopropyltrimethoxysilane, γ-mercaptopropyltriethoxysilane, γ-mercaptopropylmethyldimethoxysilane,
γ-mercaptopropylmethyldiethoxysilane, (H
_{3 CO) 3 Si-S-} S-Si (OCH 3) 3, (CH
_The molecular weight can be controlled by using a chain transfer agent such as ₃ O) ₃ Si—S ₈ —Si (OCH ₃ ) ₃ . In particular, when a chain transfer agent having a hydrolyzable silyl group in the molecule, for example, γ-mercaptopropyltrimethoxysilane, a hydrolyzable silyl group can be introduced into the terminal of the vinyl copolymer containing a silyl group. Polymerization solvents include hydrocarbons (toluene, xylene, n-hexane, cyclohexane, etc.), acetates (ethyl acetate, butyl acetate, etc.), alcohols (methanol, ethanol, isopropanol, n
Non-reactive solvents such as butanol, ethers (ethyl cellosolve, butyl cellosolve, cellosolve acetate, etc.), ketones (methyl ethyl ketone, ethyl acetoacetate, acetylacetone, diacetone alcohol, methyl isobutyl ketone, acetone, etc.) There is no particular limitation.

The fluorine-based resin further includes a hydroxyl group.
It is preferable that the resin
An example of a hydroxyl group-containing fluorocopolymer is chlorotoluene.
Trifluoroethylene, tetrafluoroethylene, trif
Fluoroolefins such as fluoroethylene; CH_Two= CH
COOCH_TwoCF_Three, CH_Two= C (CH_Three) COOCH_TwoC
F_Three, CH_Two= CHCOOCH (CF_Three)_Two, CH_Three= C
(CH_Three) COOCH (CF _Three)_Two, CH_Two= CHCOOC
H_TwoCF_TwoCF_TwoCF_Three, CH_Two= CHCOOCF_Three, CH_Two
= C (CH_Three) COOCH_TwoCF_TwoCF_TwoCF_Three, CH_Two= C
(CH_Three) COOCF _Three(Meth) acrylic acid full including
Fluoro-containing vinyl monomers such as oloalkyl, hydro
Xylethyl vinyl ether, hydroxypropyl vinyl
Ether, hydroxybutyl vinyl ether, hydroxy
Hydroxyalkyl vinyl such as sihexyl vinyl ether
Ether; 2-hydroxyethyl acrylate, 2-
Hydroxyethyl methacrylate, 2-hydroxypro
Pill acrylate, 2-hydroxypropyl methacrylate
N-methylol acrylamide, N-methylol
Methacrylamide, Aronix 5700 (Toa Gosei
Co., Ltd.), Placcel FA-1, FA-4, FM-1, FM-4
(Including those manufactured by Daicel Chemical Co., Ltd.)
Nomer, ethyl vinyl ether, propyl vinyl A
Alkyl vinyl ethers such as ter and butyl vinyl ether
Cyclohexyl vinyl ether; maleic acid, fuma
Acrylic acid, acrylic acid, methacrylic acid, carboxylic acid
Carboxyl-group-containing monomers such as kyl vinyl ether;
Ethylene, propylene, vinyl chloride, vinylidene chloride,
Vinyl acetate; methyl methacrylate, methyl acrylate, etc.
Unsaturated carboxylic acid ester of vinyltriethoxysila
Γ- (meth) acryloyloxypropyltrimeth
Hydrolyzable silyl group-containing monomers such as xysilane;
The hydroxyl value obtained by copolymerizing
mgKOH / g, preferably 10-250 mgKOH / g
g.

Examples of the resin containing a hydrolyzable silyl group include Zemurac (registered trademark) manufactured by Kanegafuchi Chemical Industry Co., Ltd.
Examples of the hydroxyl group-containing fluororesin or resin composition include Lumiflon and Bonflon manufactured by Asahi Glass Coat and Resin Co., Ltd., New Gamet manufactured by Toube Co., Ltd., and V Freon manufactured by Dainippon Paint Co., Ltd. (all are registered trademarks).

Regarding the properties of the polymer for the surface film 11,
A material that has sufficient weather resistance, has good light transmittance, and cures at a temperature that does not deteriorate the solar battery cell in the curing process, specifically, 200 ° C. or less, more preferably 150 ° C. or less is desired.

As a raw material of the inorganic polymer contained in the surface film 11, an alkyl silicate can be used, and more specifically, for example, ethyl silicate, butyl silicate, or a mixture thereof can be included. Further, such an inorganic polymer may be ultimately converted into silica. Further, the inorganic polymer may be one in which organic molecules are added to the inorganic polymer molecular structure, one in which inorganic molecules are mixed with organic molecules, or one in which organic polymers are dispersed in inorganic polymers. Good. In these inorganic polymers, by adding a curing catalyst before coating, the film forming speed until curing is sometimes controlled.

It is preferable to add a catalyst to these inorganic binders before the coating in the same manner as when a hydrolyzable silyl group-containing resin is used, so that the film forming speed can be controlled. As the curing catalyst, specifically, dibutyltin dilaurate, dibutyltin dimaleate,
Organotin compounds such as dioctyltin dilaurate, dioctyltin dimaleate, tin octylate; phosphoric acid, monomethyl phosphate, monoethyl phosphate, monobutyl phosphate, monooctyl phosphate, monodecyl phosphate, dimethyl phosphate, diethyl phosphate, dibutyl phosphate, dioctyl Phosphoric acid or phosphate such as phosphate and didecyl phosphate; propylene oxide, butylene oxide, cyclohexene oxide, glycidyl methacrylate, glycidol, acrylic glycidyl ether, γ
-Glycidoxypropyltrimethoxysilane, γ-glycidoxypropyltriethoxysilane, γ-glycidoxypropylmethyldimethoxysilane,

[0138]

Embedded image Cardeura E (Yuka Kasei Co., Ltd.), Epikote 82
No. 8 (manufactured by Yuka Shell), Epicoat 1001 (manufactured by Yuka Shell), and the like, an addition reaction product of an epoxy compound and phosphoric acid and / or a monoacid phosphate; an organic titanate compound; an organic aluminum compound; Maleic acid,
Acidic compounds such as p-toluenesulfonic acid; aliphatic diamines such as ethylenediamine and hexanediamine; aliphatic polyamines such as diethylenetriamine, triethylenetetramine and tetraethylenepentamine; alicyclic amines such as piperidine and piperazine; Aromatic amines such as phenylenediamine, ethanolamines, triethylamine, γ-aminopropyltriethoxysilane, N-β- (aminoethyl) -γ-aminopropyltrimethoxysilane; hexylamine, di-2-
Amines such as ethylhexylamine, N, N-dimethyldodecylamine and dodecylamine; reactants of these amines with acidic phosphate esters; alkaline compounds such as sodium hydroxide and potassium hydroxide; n-dodecyl mercaptan; Alkyl mercaptans such as butyl mercaptan; mercaptosilanes such as r-mercaptopropyltrimethoxysilane; carboxylic acids such as 2-mercaptopropionic acid and thiosalicylic acid; thioglycolic acid 2
-Ethylhexyl and like ester compounds;
Polymers such as 00 (a polyether having a mercapto group at both ends, manufactured by Diamond Shamrock Chemicals Co., Ltd.), and mercapto group-containing compounds such as thiophenol and thiobenzoic acid; BT120S (organotin compounds based on Kaneguchi Chemical Industry Co., Ltd.) And the like. Among these curing catalysts, organotin compounds, acid phosphates, amines,
A reaction product of an acidic phosphoric acid ester and an amine, a saturated or unsaturated polycarboxylic acid or an acid anhydride thereof, a reactive silicon compound, an organic titanate compound, an organic aluminum compound, or a mixture thereof is preferable, and in particular, an organic tin Curing catalysts containing compounds or organotin compounds are preferred. Among them, a curing catalyst using an organotin compound and an amine, and / or a mercapto compound is preferable.

The inorganic polymer for the surface film 11 has a general formula:

[0140]

Embedded image (Wherein, R ₃ is a monovalent hydrocarbon group selected from an alkyl group having 1 to 10 carbon atoms, an aryl group and an aralkyl group;
R ₄ is a monovalent hydrocarbon group selected from an alkyl group, an aryl group and an aralkyl group having 1 to 10 carbon atoms, and b represents 0 or 1) and / or a partial hydrolytic condensation thereof. Object is used.

In the above general formula, R ₃ has 1 to 1 carbon atoms.
0 alkyl group, preferably an alkyl group having 1 to 4 carbon atoms, an aryl group, preferably an aryl group having 6 to 9 carbon atoms and an aralkyl group, preferably a monovalent aralkyl group having 7 to 9 carbon atoms. R ₄ is an alkyl group having 1 to 10 carbon atoms, preferably an alkyl group having 1 to 4 carbon atoms, an aryl group, preferably an aryl group having 6 to 9 carbon atoms and an aralkyl group, preferably 7-9
Is a monovalent hydrocarbon group selected from aralkyl groups.
B is 0 or 1, that is, (R ₃
O) There are 3 to 4 groups. Incidentally, 3-4 present in the same molecule (R ₃ O) groups may be the same or different.

The above-mentioned R ₃ or R ₄ has 1 to 10 carbon atoms.
Alkyl group, preferably an alkyl group having 1 to 4 carbon atoms,
Specific examples of the aryl group having 6 to 9 carbon atoms and the aralkyl group having 7 to 9 carbon atoms include a methyl group, an ethyl group, an n-propyl group, an i-propyl group, an n-butyl group, an i-butyl group, and a t-group. -Butyl group, phenyl group, benzyl group and the like.

Specific examples of the silicon-containing compound include, for example, tetramethyl silicate, tetraethyl silicate, tetra-n-propyl silicate,
Tetraalkyl silicates such as i-propyl silicate, tetra-n-butyl silicate, tetra-i-butyl silicate and tetra-t-butyl silicate; methyltrimethoxysilane, methyltriethoxysilane, octadecyltriethoxysilane, methyltri-sec- Alkyltrialkoxysilanes such as octyloxysilane, methyltriisopropoxysilane and methyltributoxysilane; aryltrialkoxysilanes such as phenyltrimethoxysilane and phenyltriethoxysilane; alkyltriaryloxysilanes such as methyltriphenoxysilane; -Trialkoxysilanes such as glycidoxytrialkoxysilanes such as glycidoxypropyltrimethoxysilane and triaryloxysilanes. That.

As the partially hydrolyzed condensate of the silicon-containing compound, for example, water is added to the above-mentioned tetraalkyl silicate, trialkoxysilane, triaryloxysilane, etc., and then partially hydrolyzed to condense. One. As a specific example,
For example, MSI51, ESI40, HAS-1, HAS
-10 (all manufactured by Colcoat Co., Ltd.), such as a partially hydrolyzed condensate of tetraalkyl silicate;
-1 (manufactured by Shin-Etsu Chemical Co., Ltd.) such as trialkoxysilane partially hydrolyzed condensate, TSB4200, TSB43
00, TSB4400, Bellclean and the like.

Note that MSI51 is represented by the following formula:

[0146]

Embedded image Is a partially hydrolyzed condensate represented by

As the inorganic binder, a material formed of one or a mixture of two or more thereof, or a mixture containing these or a mixture of these as a main component is used. In addition, the inorganic binder may be one in which organic molecules are added to the inorganic binder molecular structure, one in which inorganic molecules and organic molecules are mixed, or one in which an organic binder is dispersed in an inorganic binder. Good. More specifically, for example, TS available on the market
B4200, TSB4300, and TSB4400 can be preferably used. These are inorganic varnishes manufactured by TSB. TSB4200 is mainly composed of ethyl silicate, TSB4400 is mainly composed of butyl silicate, and TSB4300 is a mixture of ethyl silicate and butyl silicate. All of them are weather-resistant and heat-resistant.

In addition to these, Bellclean (registered trademark) in which an organic polymer is further mixed with these acrylic silicates may be used. Bellclean is a ceramic paint manufactured by Nippon Yushi Co., Ltd., which combines a special ceramic component with a highly durable organic component.

The average thickness of the surface film 11 is 0.1 to 10
It is preferably in the range of μm. The reason is that when the thickness of the anti-glare film is 0.1 μm or less, it becomes difficult to flatten the uneven surface texture.
If the thickness is more than μm, the translucency is reduced, and the light reaching the solar cell 5 may be reduced.

In the formation of the antiglare film 10, for example, a polymer coating material is applied to the glass substrate 1 with a predetermined thickness using a piano wire coater, spray, screen printing or the like. Then, as shown in FIG. 8, for example, by using an embossing roller 9 that rotates in the direction of arrow A and advances in the direction of B, fine irregularities can be formed on the surface of the antiglare film 10. Of course, the formation of such a fine surface unevenness structure is not limited to the embossing roll, but can also be formed by using embossed film transfer, sandblasting, or the like. Since the coating material for the anti-glare film is much softer than the glass substrate 1 before being cured, such an uneven surface forming process is easy without causing any damage to other portions of the solar cell module. Can be performed.

As the material for the antiglare film 10, the surface film 11
The same material as described above can be used. It is preferable that the materials of the surface film 11 and the anti-glare film 10 are formed of different materials from the viewpoint of the light scattering effect of the anti-glare film 10. However, even if the surface film 11 and the anti-glare film 10 are formed of the same material, the once formed uneven surface of the anti-glare film 10 forms a clear interface with the surface film 11, and the uneven surface forms an optical interface. The scattering effect is maintained. Therefore, the surface film 11
Thus, the uneven surface of the anti-glare film 10 may be smoothed to reduce the adhesion of dust, or the surface film 11 may be formed so as to maintain the unevenness with emphasis on the anti-glare effect.

When the surface film 11 is formed of a fluororesin to prevent contamination, the surface has good water repellency,
Dust adhesion due to rainwater etc. is reduced. On the other hand, the surface film 11
Is formed from an alkyl silicate, the chemical resistance of the surface of the solar cell module is improved, the hydrophilicity is improved, and even if it is contaminated, the effect is uniformed and less noticeable.

In order to improve the hardness, wear resistance and weather resistance of the surface film 11, an inorganic polymer is preferably used.
Organic polymers are preferably used to prevent cracking.

Since the surface film 11 formed as described above covers the entire surface of the glass substrate 1, it is possible to mask the difference in the color tone of the glass substrate 1 due to variation among manufacturers and lots, and It is also possible to enhance the aesthetic appearance by unifying the color tones between the plurality of solar cell modules arranged in a row.

FIG. 10 is a sectional view showing a partially enlarged antiglare film 10 of still another example of the solar cell module according to the present invention.

In the above, an example in which fine irregularities are formed on the surface of the antiglare film has been mainly described. However, even if the surface of the antiglare film is flat as shown in FIG. Depending on the difference in refractive index between the particles and the particles, an antiglare effect may be exhibited.

[0157]

EXAMPLES An antiglare film was formed on a glass substrate under various conditions, and the optical characteristics and the like were evaluated.

Example 1 A TCO (transparent conductive oxide) film was formed on one surface of a glass substrate having a flat surface, and an antiglare film was formed on the other surface under the following conditions.

First, "ZEMRAC Y3623" manufactured by Kanegafuchi Chemical Industry Co., Ltd. was used as an organic material binder, BT120S (tin-based) was used as a curing agent, and xylene was used as a diluent. did.

As the organic material particles, Sekisui Chemical P.
MMA “MBX-8” (φ8 μm) was used and dispersed in the binder resin using a shaker. The compounding ratio of the particles was adjusted so that binder resin: particles = 100: 10.

The liquid thus obtained was applied on a glass substrate by spraying and dried at room temperature for 5 minutes.
Further drying was performed at 80 ° C. for 30 minutes.

Thus, the sample of Example 1 in which the TCO film was formed on one surface of the glass substrate and the irregular reflection film was formed on the other surface, was obtained.

The sample of Example 1 was irradiated with light from the side on which the antiglare film was formed to obtain “60 ° gloss” and “20 ° gloss”.
° Gloss ”and“ total transmittance ”were measured, and the optical characteristics were evaluated.

“60 ° gloss” refers to JIS Z 874
According to the method for measuring specular gloss of 1-183, 60 ° specular gloss was measured.

"20 ° glossiness" refers to JIS Z 874
According to the method for measuring specular gloss of 1-183, 20 ° specular gloss was measured.

Next, the sample of Example 1 was subjected to a film thickness measurement and an X-cut test to evaluate the initial film.

The “X-cut test” is based on JIS K540
Perform according to 0, and if the whole surface has been peeled off,
The evaluation was made such that the better the score, the higher the score, assuming that there were no points and no defects.

Further, with respect to the sample of Example 1, J
A durability test was performed according to IS C 8938, and the subsequent films were evaluated.

The durability test was carried out by leaving the film at 85 ° C. for 264 hours, and leaving it at 85 ° C. and 85% humidity for 270 hours.
The test was performed under three conditions of repeating 10 cycles between a temperature of 85 ° C., a humidity of 85% and −20 ° C., and an X-cut test and evaluation of appearance were performed on the film after the test.

(Example 2) Binder resin: particles = 10
The blending ratio of the particles was adjusted to be 0:20, and
In the same manner as in Example 1, a sample of Example 2 was produced.

With respect to the sample of Example 2 thus obtained, the optical characteristics, the initial film, and the film after the durability test were evaluated in the same manner as in Example 1.

(Example 3) Using PE "SE480-10T" manufactured by Kusumoto Kasei (average φ15 μm, maximum φ30 μm) as organic material particles, binder resin: particles = 100:
The blending ratio of the particles was adjusted to 2.5, and a sample of Example 3 was produced in the same manner as in Example 1.

With respect to the sample of Example 3 thus obtained, the optical characteristics, the initial film, and the film after the durability test were evaluated in the same manner as in Example 1.

(Example 4) Binder resin: particles = 10
The mixing ratio of the particles was adjusted so as to be 0: 5, and a sample of Example 4 was produced in the same manner as in Example 3.

With respect to the sample of Example 4 thus obtained, the optical characteristics, the initial film, and the film after the durability test were evaluated in the same manner as in Example 1.

(Comparative Example 1) A sample of Comparative Example 1 was prepared in which a TCO film was formed on one surface of a glass substrate having the same flat surface as in Example 1 and no antiglare film was formed on the other surface.

The optical characteristics of the thus obtained sample of Comparative Example 1 were evaluated in the same manner as in Example 1.

(Comparative Example 2) FIG. 12 is a sectional view showing a schematic configuration of another example of a conventional solar cell module.

Referring to FIG. 12, in this solar cell module, as a glass substrate, reinforced embossed glass 111 having an uneven shape formed by embossing on the semiconductor layer forming surface side is used.

The tempered embossed glass 111 used in this conventional solar cell module was used as a sample of Comparative Example 2, and the sample of Comparative Example 2 was also irradiated with light from the direction opposite to the direction in which the irregularities were formed. Evaluation of optical characteristics was performed in the same manner as in Example 1.

Examples 1-4 and Comparative Examples 1-2 described above
Tables 2 to 4 collectively show the film forming conditions of the anti-glare film of the sample and the evaluation results.

[0182]

[Table 2]

[0183]

[Table 3]

[0184]

[Table 4] Example 5 One side of a glass substrate having a flat surface was provided with TC
An O (transparent conductive oxide) film was formed, and an antiglare film was formed on the other surface under the following conditions.

First, "ZEMRAC YC3623" manufactured by Kanegafuchi Chemical Industry Co., Ltd. was used as an organic material binder, BT120S (tin-based) was used as a curing agent, and xylene was used as a diluent to dilute to a solid content of 25%. did.

As the inorganic material particles, silica “TS100” (φ4 μm) manufactured by Degussa Japan was used and dispersed in the above-mentioned binder resin using a shaker. The compounding ratio of the particles is as follows: binder resin: particles = 100:
It was prepared to be 2.5.

The liquid thus obtained was applied on a glass substrate by spraying and dried at room temperature for 5 minutes.
Further drying was performed at 80 ° C. for 30 minutes.

Thus, a sample of Example 5 in which the TCO film was formed on one surface of the glass substrate and the irregular reflection film was formed on the other surface, was obtained.

With respect to the sample of Example 5 thus obtained, the optical characteristics, the initial film, and the film after the durability test were evaluated in the same manner as in Example 1.

Example 6 Binder Resin: Particle = 10
The blending ratio of the particles was adjusted to be 0: 5, and a sample of Example 6 was produced in the same manner as in Example 5.

With respect to the sample of Example 6 thus obtained, the optical characteristics, the initial film, and the film after the durability test were evaluated in the same manner as in Example 1.

(Example 7) Instead of Zemrak YC3623, Zemrak YC592 manufactured by Kanegabuchi Chemical Industry Co., Ltd. was used.
Using 0, the compounding ratio of the particles was adjusted so that the ratio of binder resin: particles = 100: 5, and a sample of Example 7 was produced in the same manner as in Example 5.

With respect to the sample of Example 7 thus obtained, the optical characteristics, the initial film, and the film after the durability test were evaluated in the same manner as in Example 1.

(Embodiment 8) A TCO film is formed on one surface of a glass substrate having a flat surface, and pretreatment of the substrate is performed using acetone and IPA (isopropyl alcohol). An irregular reflection film was formed under the following conditions.

First, "Bonflon 2020S" manufactured by Asahi Glass Coat and Resin Co., Ltd. was used as an organic material binder.
R ", and this was diluted 2-fold using a special thinner.

As the inorganic material particles, silica “OK-607” (φ2 μm) manufactured by Degussa Japan was used and dispersed in the binder resin described above. The blending ratio was adjusted so that binder resin: particles = 100: 5.

The liquid thus obtained was applied on a glass substrate by spraying and dried at normal temperature.

Example 8 in which the TCO film was formed on one side of the glass substrate and the irregular reflection film was formed on the other side of the glass substrate
Sample was obtained.

The optical characteristics and the initial film of the sample of Example 8 were evaluated in the same manner as in Example 1.

Example 9 A liquid in which particles were dispersed in a binder resin was applied twice on a glass substrate by spraying.
Otherwise in the same manner as in Example 8, a sample of Example 9 was produced.

The optical characteristics and the initial film of the sample of Example 9 were evaluated in the same manner as in Example 1.

(Example 10) Binder resin: particles = 10
The blending ratio of the particles was adjusted to be 0: 3, and a sample of Example 10 was produced in the same manner as in Example 8.

With respect to the sample of Example 10 thus obtained, the optical characteristics and the initial film were evaluated in the same manner as in Example 1.

Example 11 A liquid in which particles were dispersed in a binder resin was applied twice on a glass substrate by spraying.
The other conditions were exactly the same as those of Example 10, and the sample of Example 11 was produced.

The optical characteristics and the initial film of the sample of Example 11 thus obtained were evaluated in the same manner as in Example 1.

Example 12 As a binder resin, only Bonflon® 2020SR was used, no diluent was used, and the compounding ratio of particles was adjusted so that binder resin: particles = 100: 5. In the same manner as in Example 8, a sample of Example 12 was produced.

The optical characteristics and the initial film of the sample of Example 12 thus obtained were evaluated in the same manner as in Example 1.

Example 13 A liquid in which particles were dispersed in a binder resin was applied twice on a glass substrate by spraying.
The other conditions were exactly the same as those in Example 12, and the sample of Example 13 was produced.

With respect to the sample of Example 13 thus obtained, the optical characteristics and the initial film were evaluated in the same manner as in Example 1.

(Example 14) As a pretreatment of a substrate, only acetone was used, and the compounding ratio of particles was adjusted so that binder resin: particles = 100: 5. Was applied onto a glass substrate, and a sample of Example 14 was produced in the same manner as in Example 8.

The samples of Example 14 thus obtained were evaluated for optical characteristics and initial film in the same manner as in Example 1.

Example 15 A sample of Example 15 was produced using a 16th piano wire coater under the same conditions as in Example 14 except for the above.

With respect to the sample of Example 15 thus obtained, the optical characteristics and the initial film were evaluated in the same manner as in Example 1.

(Example 16) Binder resin: particles = 10
The mixing ratio of the particles was adjusted so as to be 0: 3, and a sample of Example 16 was produced in the same manner as in Example 14 using an 8th-rank piano wire coater.

With respect to the sample of Example 16 thus obtained, the optical characteristics and the initial film were evaluated in the same manner as in Example 1.

(Example 17) A sample of Example 17 was produced using a piano wire coater of the 16th number in exactly the same manner as in Example 16 except for the above conditions.

The samples of Example 17 thus obtained were evaluated for optical characteristics and initial film in the same manner as in Example 1.

Example 18 Binder Resin: Particles = 10
The mixing ratio of the particles was adjusted so as to be 0: 5, and a sample of Example 18 was produced using an 8th-rank piano wire coater under the same conditions as in Example 14.

With respect to the sample of Example 18 thus obtained, the optical characteristics and the initial film were evaluated in the same manner as in Example 1.

Example 19 A sample of Example 19 was prepared using a 16th piano wire coater under the same conditions as in Example 18 except for the above.

With respect to the sample of Example 19 thus obtained, the optical characteristics and the initial film were evaluated in the same manner as in Example 1.

(Example 20) As inorganic material particles, a silica sol “EG-ST-ZL” manufactured by Nissan Chemical Industries, Ltd. (φ
0.07 to 0.1 μm) and binder resin: particles =
The mixing ratio of the particles is adjusted so as to be 100: 1900,
The other conditions were exactly the same as those of Example 16 to produce a sample of Example 20.

With respect to the sample of Example 20 thus obtained, the optical characteristics and the initial film were evaluated in the same manner as in Example 1.

(Example 21) Binder resin: particles = 10
The blending ratio of the particles was adjusted to be 0: 900, and a sample of Example 21 was produced in the same manner as in Example 20.

With respect to the sample of Example 21 thus obtained, the optical characteristics and the initial film were evaluated in the same manner as in Example 1.

Example 22 Binder Resin: Particle = 10
The mixing ratio of the particles was adjusted so as to be 0: 400, and a sample of Example 22 was produced in the same manner as in Example 20.

With respect to the thus obtained sample of Example 22, the optical characteristics and the initial film were evaluated in the same manner as in Example 1.

Example 23 Binder Resin: Particles = 10
Example 2 The compounding ratio of the particles was adjusted so as to be 0:90.
In the same manner as in Example No. 0, a sample of Example 23 was produced.

The optical characteristics and the initial film of the sample of Example 23 obtained in this manner were evaluated in the same manner as in Example 1.

(Example 24) Binder resin: particles = 10
The compounding ratio of the particles was adjusted to be 0:67, and
In the same manner as in Example No. 0, a sample of Example 24 was produced.

The samples of Example 24 thus obtained were evaluated for optical characteristics and initial film in the same manner as in Example 1.

Examples 5 to 24 described above and Comparative Examples 1 to
The film forming conditions of the anti-glare film of Sample 2 and the evaluation result were
The results are shown in Tables 5 to 7.

[0233]

[Table 5]

[0234]

[Table 6]

[0235]

[Table 7] Example 25 One side of a glass substrate having a flat surface was T
After forming a CO (transparent conductive oxide) film, pretreatment of the substrate was performed using toluene and acetone, and then an antiglare film was formed on the other surface of the substrate under the following conditions.

First, "TSB4300" manufactured by TSB was used as an inorganic material binder, and ethanol was added thereto.

As the organic material particles, Sekisui Chemical P.
MMA “MBX-8” (φ8 μm) was used and dispersed in the binder described above. The compounding ratio of the particles was adjusted so that binder: particles = 100: 10.

The liquid thus obtained was applied on a glass substrate by spraying, dried for 10 minutes by air drying, and then dried at 60 ° C. for 1 hour and further at 120 ° C. for 1 hour.

Thus, a sample of Example 25 in which the TCO film was formed on one surface of the glass substrate and the irregular reflection film was formed on the other surface, was obtained.

With respect to the thus obtained sample of Example 25, the optical characteristics and the initial film were evaluated in the same manner as in Example 1.

(Example 26) Binder: particles = 100:
The blending ratio of the particles was adjusted to be 20 and a sample of Example 26 was produced in the same manner as in Example 25.

The samples of Example 26 thus obtained were evaluated for optical characteristics and initial film in the same manner as in Example 1.

(Example 27) Binder: particles = 100 using PE "SE480-10T" (average φ15 μm, maximum φ30 μm) manufactured by Kusumoto Chemicals as organic material particles.
Example 25 was prepared by adjusting the compounding ratio of the particles to 2.5.
In the same manner as in the above, a sample of Example 27 was produced.

The optical characteristics and the initial film of the sample of Example 27 thus obtained were evaluated in the same manner as in Example 1.

(Example 28) Binder: particles = 100:
The blending ratio of the particles was adjusted to be 5, and a sample of Example 28 was produced in the same manner as in Example 27.

The optical characteristics and the initial film of the sample of Example 28 were evaluated in the same manner as in Example 1.

Examples 25 to 28 described above and Comparative Example 1
Tables 8 to 9 collectively show the film formation conditions and the evaluation results of the anti-glare films of Samples 2 to 2.

[0248]

[Table 8]

[0249]

[Table 9] Example 29 One side of a glass substrate having a flat surface was T
After forming a CO (transparent conductive oxide) film, pretreatment of the substrate was performed using toluene and acetone, and then an antiglare film was formed on the other surface of the substrate under the following conditions.

First, “TSB4400” manufactured by TSB was used as an inorganic material binder, and HCl was added to this as a hydrolysis catalyst.

As the inorganic material particles, a silica sol “EG-ST-ZL” manufactured by Nissan Chemical Industries, Ltd. (φ0.07
０．１0.1 μm) and dispersed by hand in the binder described above. The compounding ratio of the particles is as follows: binder: particles =
It was prepared to be 5:95.

The liquid thus obtained was placed on a glass substrate with No. After applying with a bar coater of No. 8 and drying by air drying for 10 minutes, it was further dried at 60 ° C. for 1 hour and further at 120 ° C. for 1 hour.

Thus, a sample of Example 29 was obtained in which the TCO film was formed on one surface of the glass substrate and the irregular reflection film was formed on the other surface.

With respect to the sample of Example 29 thus obtained, the optical characteristics, the initial film, and the film after the durability test were evaluated in the same manner as in Example 1.

(Example 30) Binder: particles = 10: 9
The blending ratio of the particles was adjusted to be 0, and a sample of Example 30 was produced in the same manner as in Example 29.

With respect to the sample of Example 30 thus obtained, the optical characteristics, the initial film, and the film after the durability test were evaluated in the same manner as in Example 1.

(Example 31) Binder: particle = 20: 8
The blending ratio of the particles was adjusted to be 0, and a sample of Example 31 was produced in the same manner as in Example 29.

With respect to the thus obtained sample of Example 31, the optical characteristics, the initial film, and the film after the durability test were evaluated in the same manner as in Example 1.

(Example 32) Binder: particle = 20: 8
The blending ratio of the particles was adjusted to be 0, and a liquid in which the particles were dispersed in a binder was applied on a glass substrate using a 30 μm applicator, and otherwise the same as in Example 29 was performed. A sample was prepared.

For the sample of Example 32, the optical properties, the initial film, and the film after the durability test were evaluated in the same manner as in Example 1.

(Example 33) After forming a TCO film on one surface of a glass substrate having a flat surface, a diffuse reflection film is formed on the other surface of the substrate under the following conditions without pretreatment of the substrate. did.

First, "TSB4300" manufactured by TSB was used as an inorganic material binder, and ethanol was added thereto.

As the inorganic material particles, silica “OK-412” (φ4 μm) manufactured by Degussa Japan was dispersed in the binder described above using a dispersion spring.
The mixing ratio was adjusted so that binder: particle = 80: 20.

The liquid thus obtained was placed on a glass substrate with No. 8 using a bar coater, air-dried for 10 minutes, and then at 60 ° C. for 1 hour, and further at 120 ° C. for 1 hour.
Let dry for hours.

Example 3 wherein the TCO film was formed on one surface of the glass substrate and the irregular reflection film was formed on the other surface of the glass substrate
Three samples were obtained.

The samples of Example 33 were evaluated for optical characteristics and initial film in the same manner as in Example 1.

(Example 34) Binder: particle = 90: 1
The blending ratio of the particles was adjusted to be 0, and a sample of Example 34 was produced in the same manner as in Example 33.

With respect to the sample of Example 34 thus obtained, the optical characteristics and the initial film were evaluated in the same manner as in Example 1.

Example 35 Binder: Particle = 95: 5
The sample of Example 35 was produced in the same manner as in Example 33 by adjusting the compounding ratio of the particles so that

The optical characteristics and the initial film of the sample of Example 35 thus obtained were evaluated in the same manner as in Example 1.

(Example 36) Binder: particle = 98: 2
The sample of Example 36 was produced without adjusting the mixing ratio of the particles so that the liquid in which the particles were dispersed in the binder was applied onto a glass substrate, and without performing a drying process.

The sample of Example 36 was evaluated for optical characteristics and initial film in the same manner as in Example 1.

(Example 37) As inorganic material particles, silica "TS100" (φ4 µm) manufactured by Degussa Japan was used.
The blending ratio of the particles was adjusted so that binder: particles = 95: 5, and a sample of Example 37 was produced in the same manner as in Example 36.

The optical characteristics and the initial film of the sample of Example 37 obtained in this manner were evaluated in the same manner as in Example 1.

(Example 38) Binder: particle = 98: 2
Then, the blending ratio of the particles was adjusted so as to obtain a sample of Example 38 in the same manner as in Example 37.

The sample of Example 38 thus obtained was evaluated for optical characteristics and initial film in the same manner as in Example 1.

(Example 39) Binder: particle = 99: 1
The mixing ratio of the particles was adjusted so as to obtain a sample of Example 39 in the same manner as in Example 37.

With respect to the sample of Example 39 thus obtained, the optical characteristics and the initial film were evaluated in the same manner as in Example 1.

(Example 40) "TSB4200" manufactured by TSB was used as a binder, and silica sol "EG-S" manufactured by Nissan Chemical Industries, Ltd. was used as inorganic material particles.
Using T-ZL ”(φ0.07 to 0.1 μm), the blending ratio of the particles was adjusted so that binder: particles = 60: 40, and a sample of Example 40 was produced in the same manner as in Example 37. .

The thus obtained sample of Example 40 was evaluated for optical properties and initial film in the same manner as in Example 1.

(Example 41) A liquid in which particles were dispersed in a binder was placed on a glass substrate by using No. 1 liquid. The sample was applied using the bar coater of Example 3 and the other conditions were exactly the same as those of Example 40, thereby producing a sample of Example 41.

The thus obtained sample of Example 41 was evaluated for optical characteristics and initial film in the same manner as in Example 1.

(Example 42) Binder: particles = 40: 6
The sample of Example 42 was produced in the same manner as in Example 41 except that the mixing ratio of the particles was adjusted to 0.

The optical characteristics and the initial film of the sample of Example 42 thus obtained were evaluated in the same manner as in Example 1.

Example 43 Binder: Particle = 20: 8
The blending ratio of the particles was adjusted to be 0, and a sample of Example 43 was produced in exactly the same manner as in Example 42.

The optical characteristics and the initial film of the sample of Example 43 thus obtained were evaluated in the same manner as in Example 1.

(Example 44) After forming a TCO film on one surface of a glass substrate having a flat surface, pretreating the substrate using toluene, the other surface of the substrate was irregularly reflected under the following conditions. A film was formed.

First, "Bellclean" manufactured by Nippon Oil & Fats Co., Ltd. mixed with an organic resin was used as an inorganic material binder, and a curing agent was added without diluting it.

As the inorganic material particles, silica “TS100” (φ4 μm) manufactured by Degussa Japan was used and dispersed in the above-mentioned binder using a dispersion blade. The compounding ratio of the particles was adjusted so that binder: particles = 97: 3.

The liquid thus obtained was placed on a glass substrate with No. Apply using a 3 bar coater and air dry to 10
Dried for minutes.

In this manner, the glass substrate was formed with the TCO film on one surface and the irregular reflection film on the other surface.
Four samples were obtained.

For the sample of Example 44, the optical characteristics and the initial film were evaluated in the same manner as in Example 1.

(Example 45) A liquid in which particles were dispersed in a binder was placed on a glass substrate by using No. 1 solution. Example 4 was applied in the same manner as in Example 44, except that the coating was performed using the bar coater of Example 4.
5 samples were produced.

The optical characteristics and the initial film of the sample of Example 45 were evaluated in the same manner as in Example 1.

(Example 46) A liquid in which particles were dispersed in a binder was placed on a glass substrate by using No. 1 liquid. A sample of Example 46 was prepared in exactly the same manner as in Example 44 except that the coating was performed using a 16 bar coater.

The optical characteristics and the initial film of the sample of Example 46 were evaluated in the same manner as in Example 1.

(Example 47) Binder: particles = 95: 5
The mixing ratio of the particles was adjusted so as to obtain a liquid in which the particles were dispersed in a binder. 3 using a bar coater, and the other steps were the same as in Example 44.
A sample of Example 47 was produced.

The sample of Example 47 was evaluated for optical characteristics and initial film in the same manner as in Example 1.

(Example 48) A liquid in which particles were dispersed in a binder was placed on a glass substrate by using No. 1 liquid. Example 4 was applied in exactly the same manner as in Example 47 except that the coating was performed using the bar coater of Example 4.
Eight samples were prepared.

The sample of Example 48 was evaluated for optical characteristics and initial film in the same manner as in Example 1.

(Example 49) A liquid in which particles were dispersed in a binder was placed on a glass substrate by using No. 1 liquid. A sample of Example 49 was prepared in exactly the same manner as in Example 47, except that the coating was performed using a 16 bar coater.

With respect to the sample of Example 49, the optical characteristics and the initial film were evaluated in the same manner as in Example 1.

Examples 29 to 49 described above and Comparative Example 1
Tables 10 to 12 collectively show the film formation conditions of the anti-glare films and the evaluation results of the samples Nos. 2 to 2.

[0304]

[Table 10]

[0305]

[Table 11]

[0306]

[Table 12]

[0307]

As described above, since the solar cell module according to the present invention is provided with the anti-glare film on the light incident surface of the transparent insulating substrate, problems such as light pollution due to light reflection are effectively prevented. You.

Further, in this method of manufacturing a solar cell module, an element portion is formed on the surface of a transparent insulating substrate, and then an anti-glare film is formed. Can be improved to prevent glare and light pollution. Further, by forming an antiglare film at the end, it is possible to achieve the above-described improvement in appearance without any change in a conventional basic solar cell module manufacturing process.

For example, when the anti-glare film is made of an organic material in which both the binder resin and the particles are made of an organic material, the adhesion is good.
An excellent solar cell module can be obtained because the loss of particles and the peeling of the film itself are reduced.

When the anti-glare film is made of an organic binder and organic particles, sunlight can be used effectively without reducing the amount of incident light so much as to have a practical effect. Further, since the inorganic material particles are less likely to deteriorate, a solar cell module excellent in weather resistance can be obtained.

When the anti-glare film is made of a combination of an inorganic binder and organic material particles, the amount of incident light does not decrease and sunlight can be effectively used. Reduces the strain in the binder layer, making it difficult for cracks and cracks to occur, so that a solar cell module excellent in weather resistance can be obtained.

When the anti-glare film is made of a combination of an inorganic binder and inorganic particles, the amount of incident light does not decrease so much as to actually affect the light, and sunlight can be used effectively. At the same time, since the same inorganic material is used, adhesion is improved. Furthermore, since both the inorganic binder and the inorganic particles have little problem of deterioration, a solar cell module excellent in weather resistance can be obtained.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a schematic configuration of an example of a solar cell module according to the present invention.

FIG. 2 is a partially enlarged cross-sectional view showing an anti-glare film portion of an example of a solar cell module according to the present invention.

FIG. 3 is a partially enlarged cross-sectional view showing a part of an antiglare film of another example of the solar cell module according to the present invention.

FIG. 4 is a cross-sectional view illustrating an example of a method for manufacturing a solar cell module according to the present invention.

FIG. 5 is a cross-sectional view illustrating an example of a method for manufacturing a solar cell module according to the present invention.

FIG. 6 is a cross-sectional view for explaining another example of the method for manufacturing a solar cell module according to the present invention.

FIG. 7 is a schematic sectional view showing a part of still another example of the solar cell module according to the present invention.

FIG. 8 is a schematic cross-sectional view showing a step of forming an antiglare film having a fine uneven surface on a cover glass of a solar cell module.

FIG. 9 is a schematic cross-sectional view showing a state in which an antifouling film is further added on the antiglare film of the solar cell module.

FIG. 10 is a partially enlarged cross-sectional view showing a part of an antiglare film of still another example of the solar cell module according to the present invention.

FIG. 11 is a cross-sectional view illustrating a schematic configuration of an example of a conventional solar cell module.

FIG. 12 is a cross-sectional view illustrating a schematic configuration of another example of a conventional solar cell module.

[Explanation of symbols]

1 transparent insulating substrate, 2 (front) transparent electrode layer, 2a transparent electrode layer dividing groove, 3 optical semiconductor layer (semiconductor photoelectric conversion layer),
3a photoelectric conversion layer dividing groove, 4 back electrode layer, 4a back electrode layer dividing groove, 5 optical semiconductor element (solar cell), 6
Filling resin (back protection filling layer), 7 back cover film (back protection film), 8 frame, 9 (emboss) roller, 10 anti-glare film, 11 stain prevention film (surface film), 20 organic or inorganic binder, 30 Organic or inorganic particles.

Claims (5)

[Claims] 1. A solar cell module comprising a transparent substrate, a semiconductor photoelectric conversion layer, a filling resin, and a back cover, wherein a light incident surface of the transparent substrate is covered with an antiglare film that scatters light, Alternatively, the light receiving surface of the solar cell module having the antiglare film or the uneven surface texture has a 60 ° glossiness of 60 or less. , Solar cell module. 2. The solar cell module according to claim 1, wherein a 60 ° glossiness of a light receiving surface of the solar cell module having the antiglare film or the uneven surface texture is 45 or less. 3. The solar cell according to claim 1, wherein a 20 ° gloss level of a light receiving surface of the solar cell module having the antiglare film or the uneven surface texture is 20 or less. Battery module. 4. The solar cell module according to claim 3, wherein a 20 ° gloss of the light receiving surface of the solar cell module having the antiglare film or the uneven surface texture is 10 or less. 5. The method according to claim 1, wherein the antiglare film or the uneven surface texture is covered with an antifouling film for maintaining or flattening the unevenness. Solar module.