Solar cell module

Abstract

To provide a solar cell element coating composition that is capable of being coated directly on a solar cell in an organic thin film solar cell, a perovskite solar cell, etc., and is cured under atmospheric pressure to form a protective film with a high water vapor barrier property.SOLUTION: A solar cell element coating composition is (A) a polymeric material represented by Formula (1). The solar cell element coating composition contains (B) an organic silicon compound having at least 3 hydrogen atoms bonded to terminal silicon atoms in one molecule and (C) a platinum group metal catalyst activated by light at a wavelength of 200 to 500 nm, and does not have an organohydrogen siloxane unit represented by HRSiO2 / 2, (in the formula, R represents an organic group).SELECTED DRAWING: None

Description

Technical Field

[0001] The present invention relates to a solar cell element coating composition and a solar cell module.

Background Art

[0002] In recent years, research and development have been underway on flexible solar cells that emphasize cost reduction and design, solar cells with through-sheet properties, organic thin-film solar cells that are lightweight and easy to handle, and solar cells having a perovskite-type compound that achieves both low cost and high efficiency in the power generation layer (hereinafter referred to as "perovskite solar cells"). Perovskite solar cells can be manufactured at a lower cost compared to crystalline silicon-based solar cells and have high power generation efficiency. A perovskite solar cell element can be obtained by laminating a light-transmissive substrate or light-transmissive film, a transparent conductive film, an electron transport layer, a power generation layer, a hole transport layer, and a back electrode from the light-receiving surface side. In the so-called module formation process of sealing the above element, a structure in which a sealing material is applied on the back side of the back electrode and sealed with a substrate, a film, etc. on the outermost back side has been studied. Various proposals have been made, such as a structure using glass for the light-transmissive substrate on the light-receiving surface side and the outermost back side substrate, and a flexible structure using a light-transmissive film on the light-receiving surface side and a film on the outermost back side.

[0003] On the other hand, perovskite-type compounds are vulnerable to water vapor, and since solar cells are exposed to harsh environments outdoors for long periods of time, it is required that perovskite solar cell modules block water vapor at a high level.

[0004] For such electronic devices that are vulnerable to water vapor, various techniques for pre-barrier water vapor on the device before the encapsulation process have been introduced. For example, Patent Document 1 introduces a three-layer barrier coating technique containing silicon, oxygen, and carbon. It forms a water vapor barrier film with flexibility and mechanical strength by plasma chemical vapor deposition (CVD) method. However, the plasma CVD method is formed under vacuum in a CVD apparatus, and since it is necessary to place the device in a vacuum chamber and perform the treatment in a vacuum environment, it is difficult to increase the size of the device. At the same time, the process involving vacuum and atmospheric release inevitably leads to complexity of the process and cost increase. In addition, Patent Document 2 introduces a technique for forming a ZnO-SiO2-Al2O3 film by direct current (DC) sputtering method. The DC sputtering method also requires a vacuum environment and has the same problems in terms of process complexity.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0006] The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a solar cell element coating composition that can be directly applied onto a solar cell, cures under atmospheric pressure, and forms a protective film with high water vapor barrier properties in organic thin film solar cells, perovskite solar cells, etc.

Means for Solving the Problems

[0007] As a result of intensive studies to solve the above problems, the present inventors have found that the following solar cell element coating composition can be directly applied onto a solar cell, cures under atmospheric pressure, and provides a protective film having a high water vapor barrier property, thereby completing the present invention.

[0008] That is, the present invention relates to 1. (A) A polymer represented by the following structural formula (1): [Chemical formula] [In the formula, each X is an independent divalent group represented by the following structural formula (2), each Y is an independent monovalent group represented by any one of the following structural formulas (3) to (5), each Y' is an independent divalent group represented by the following structural formula (6) or (7), and Me represents a methyl group. m is an integer of 0 to 12. [Chemical formula] (In the formula, the asterisk (*) indicates the bonding site to the silicon atom.) [Chemical formula] (In formulas (3) to (7), the asterisk (*) indicates the bonding site to the silicon atom, and the configuration at each asymmetric carbon may be either cis (exo) or trans (endo).) (B) An organosilicon compound having at least three hydrogen atoms bonded to terminal silicon atoms in one molecule, and (C) A platinum group metal catalyst activated by light having a wavelength of 200 to 500 nm and containing and having no organohydridosiloxane unit represented by HRSiO 2 / 2 (wherein R represents an organic group) in the solar cell element coating composition, 2. The solar cell element coating composition according to 1, wherein the component (B) contains a compound represented by the following formula (I), an addition reaction product of phenyltrivinylsilane and 1,4-bis(dimethylsilyl)benzene represented by the following formula (II), or both. [Chemical formula] [Chemical formula] (In formula (II), n is an integer from 1 to 20.) 3. The component (C) is 1 or 2 solar cell element coating compositions containing a (η 5 -cyclopentadienyl) trialiphatic platinum compound or a bis(β-diketonato) platinum compound, 4. A solar cell module comprising a solar cell element and a water vapor barrier layer composed of a cured product of any one of the solar cell element coating compositions from 1 to 3, 5. The solar cell module according to 4, wherein the solar cell element is an organic thin film type or perovskite type solar cell element, 6. A method for manufacturing a solar cell module having a step of bringing any one of the solar cell element coating compositions from 1 to 3 into contact with a solar cell element directly or through a layer and curing it by light irradiation with a wavelength of 200 to 500 nm under atmospheric pressure is provided. [Advantages of the Invention]

[0009] The solar cell element coating composition of the present invention can be directly applied onto a solar cell, and cures under atmospheric pressure to give a cured product with high water vapor barrier properties. The solar cell element coating composition of the present invention having such characteristics is useful as a protective film for organic thin film solar cells and perovskite type solar cells, etc. [Brief Description of the Drawings]

[0010]

Figure 1

Figure 2

[0011] Hereinafter, the present invention will be specifically described. [1] Component (A) Component (A) in the solar cell element coating composition of the present invention is a polymer represented by the following structural formula (1).

[0012] [Chemical formula]

[0013] In formula (1), X is a divalent group independently represented by the following structural formula (2), Y is a monovalent group independently represented by any of the following structural formulas (3) to (5), Y' is a divalent group independently represented by the following structural formula (6) or (7), and Me represents a methyl group (hereinafter the same).

[0014] [Chemical formula] (In the formula, the asterisk (*) indicates the bonding site with the silicon atom.)

[0015] [Chemical formula] (In formulas (3) to (7), the asterisk (*) indicates the bonding site with the silicon atom, and the configuration at each asymmetric carbon may be either cis (exo) or trans (endo).)

[0016] Note that the divalent group represented by the above structural formula (6) or (7) is not limited in its bonding direction as described above, and also includes a structure in which each individual structure is rotated 180° on the paper surface.

[0017] Also, m is an integer from 0 to 12, preferably 1 to 5. When m exceeds 12, it becomes a liquid with high viscosity at normal temperature and is difficult to handle.

[0018] (A) component's kinematic viscosity is not particularly limited, but 1,000 to 100,000 mm 2 / s is preferable, and 5,000 to 30,000 mm 2 / s is more preferable. In the present invention, the kinematic viscosity is the value at 23°C measured by a Cannon-Fenske viscometer (hereinafter the same).

[0019] (A) component can be prepared, for example, as an addition reaction product of (a): bis(dimethylsilyl)benzene and (b): vinylnorbornene according to a known method (such as JP-A-2005-133073).

[0020] (a) component is ortho-, meta-, or para-substituted bis(dimethylsilyl)benzene represented by the following structural formula (8), and either a single structure or a mixture of two or more isomers may be used.

[0021]

Chemical formula

[0022] (b) component is 5-vinylbicyclo[2.2.1]hepta-2-ene represented by the following structural formula (9), and either a single structure or a mixture of two or more isomers may be used.

[0023]

Chemical formula

[0024] The (A) component of the present invention can be obtained, for example, by subjecting (a) component having 2 SiH groups in one molecule to an addition reaction with an excess amount of 1 to 10 moles, preferably more than 1 to 5 moles of (b) component having 2 addition-reactive carbon-carbon double bonds in one molecule in the presence of a hydrosilylation reaction catalyst.

[0025] As the hydrosilylation reaction catalyst, known ones can be used. For example, carbon powder supporting a platinum metal, platinum black, platinum dichloride, chloroplatinic acid, a reaction product of chloroplatinic acid and a monohydric alcohol, a complex of chloroplatinic acid and olefins, platinum-based catalysts such as platinum bisacetylacetonate; palladium-based catalysts, platinum group metal-based catalysts such as rhodium-based catalysts, and the like. Also, the addition reaction conditions, the use of solvents, etc. are not particularly limited and may be carried out under known conditions.

[0026] As described above, when preparing the component (A), since an excess molar amount of the component (b) is used with respect to the component (a), the component (A) has two addition-reactive carbon-carbon double bonds derived from the structure of the component (b) in one molecule.

[0027] Also, when using a component having an addition-reactive carbon-carbon double bond as the component (B) etc. described later, the ratio of the addition-reactive carbon-carbon double bond derived from the component (A) to the total addition-reactive carbon-carbon double bonds in the composition of the present invention is preferably 20 to 100 mol%, more preferably 40 to 100 mol%.

[0028] The above component (A) may be used alone or in combination of two or more.

[0029] [2] Component (B) The component (B) in the solar cell element coating composition of the present invention is an organosilicon compound having at least three hydrogen atoms (hydrosilyl groups) bonded to terminal silicon atoms. Since such terminal hydrosilyl groups have high reactivity in the hydrosilylation reaction, the formation of a three-dimensional crosslink proceeds rapidly, giving a cured product with high hardness. Also, the component (B) is HRSiO 2 / 2 (In the formula, R represents an organic group.) An organohydridosiloxane unit (D HIt is an organosilicon compound having no [[unit]], and examples thereof include a compound represented by the following formula (I), an addition reaction product of phenyltrivinylsilane and 1,4-bis(dimethylsilyl)benzene represented by the following formula (II), a compound represented by the following formula (III), and the like.

[0030] [Chemical formula]

[0031] [Chemical formula] (In formula (II), n is an integer of 1 to 20, preferably 1 to 10, and the dashed line represents a bond.)

[0032] [Chemical formula]

[0033] (The kinematic viscosity of component (B) is not particularly limited, but is preferably 0.1 to 100,000 mm 2 / s, more preferably 0.1 to 3,000 mm 2 / s, and even more preferably 0.5 to 500 mm 2 / s.)

[0034] (The blending amount of component (B) is preferably such that the amount of hydrogen atoms bonded to silicon atoms with respect to 1 mol of the addition-reactive carbon-carbon double bond of component (A) in the composition is 0.5 to 1.5 mol, and more preferably 0.8 to 1.2 mol.)

[0035] The above component (B) may be used alone or in combination of two or more.)

[0036] [3] Component (C) The platinum group metal catalyst for the hydrosilylation reaction of component (C) is inert under light shielding and changes into an active platinum catalyst by irradiating light with a wavelength of 200 to 500 nm, promoting the hydrosilylation reaction between the addition-reactive carbon-carbon double bond in component (A) and the silicon atom-bonded hydrogen atom in component (B).

[0037] Specific examples of such component (C) include (η 5 -cyclopentadienyl) trialiphatic platinum compounds, derivatives thereof, and the like. Among these, particularly preferred are cyclopentadienyltrimethylplatinum complex, methylcyclopentadienyltrimethylplatinum complex, and derivatives in which their cyclopentadienyl groups are modified. In addition, bis(β-diketonato) platinum compounds are also cited as examples of suitable component (C), and among these, particularly preferred are bis(acetylacetonato) platinum compound and derivatives in which their acetylacetonato groups are modified.

[0038] The blending amount of component (C) is not limited as long as it promotes the curing (hydrosilylation reaction) of the present composition, and it is preferably an amount such that the platinum group metal atoms in this component are in the range of 0.01 to 500 ppm by mass unit with respect to the total mass of components (A) and (B) of the present composition, more preferably 0.05 to 100 ppm, and even more preferably 0.01 to 50 ppm.

[0039] The above component (C) may be used alone or in combination of two or more.

[0040] [4] Component (D) In the solar cell element coating composition of the present invention, a reaction control agent of component (D) may be added as necessary to prevent thickening or gelation before heat curing when formulating the composition or coating it on a substrate. Specific examples thereof include 3-methyl-1-butyn-3-ol, 3-methyl-1-pentyn-3-ol, 3,5-dimethyl-1-hexyn-3-ol, 1-ethynylcyclohexanol, ethynylmethyldecylcarbinol, 3-methyl-3-trimethylsiloxy-1-butyne, 3-methyl-3-trimethylsiloxy-1-pentyne, 3,5-dimethyl-3-trimethylsiloxy-1-hexyne, 1-ethynyl-1-trimethylsiloxysiloxane, 1,3,5,7-tetramethyl-1,3,5,7-tetravinylcyclotetrasiloxane, 1,1,3,3-tetramethyl-1,3-divinyldisiloxane, and the like. Among these, 1-ethynylcyclohexanol, ethynylmethyldecylcarbinol, 3-methyl-1-butyn-3-ol, and bis(2,2-dimethyl-3-butynoxy)dimethylsilane are preferable.

[0041] The blending amount of component (D) is preferably 0.01 to 2.0 parts by mass, more preferably 0.01 to 0.1 parts by mass, based on 100 parts by mass in total of components (A) and (B). Within such a range, the effect of reaction control is sufficiently exhibited.

[0042] Further, the solar cell element coating composition of the present invention does not substantially have an organohydridosiloxane unit (D unit) represented by HRSiO 2 / 2 (wherein R represents an organic group). Such side-chain hydrosilyl groups may hinder the progress of the addition reaction because they are less reactive than the terminal hydrosilyl groups in the above component (B). H

[0043] [5] Other Components The solar cell element coating composition of the present invention may contain other components exemplified below, as long as the object of the present invention is not impaired, in addition to the above components (A) to (C) and the component (D) used as necessary. ​For example, an adhesion promoter having a functional group group consisting of one or more alkenyl groups, (meth)acrylic groups, carbonyl groups, epoxy groups, alkoxysilyl groups, and amide groups in one molecule; a thixotropy control agent such as fumed silica; a reinforcing agent such as crystalline silica; an antioxidant such as a hindered phenol or a hindered amine; a light stabilizer; a heat resistance improver such as a metal oxide or a metal hydroxide; a colorant such as titanium oxide; a thermal conductivity-imparting filler such as alumina or crystalline silica; a viscosity modifier such as a non-reactive silicone oil having no reactive functional group; a conductivity-imparting agent such as metal powder of silver, gold, etc.; pigments, dyes, etc. for coloring.

[0044] The solar cell element coating composition of the present invention is excellent in light transmittance and can easily obtain a cured product of a thin film, so it is suitable as a transparent protective material for organic thin film solar cell elements, perovskite solar cell elements, etc. By using the solar cell element coating composition of the present invention, for example, a cured product having a total light transmittance of 90% or more measured by a method conforming to JIS K 7361-1:1997 and a thickness of 50 μm can be produced.

[0045] [6] Solar cell module FIG. 1 shows an example of a perovskite solar cell module according to the present invention. The perovskite solar cell 10 includes a light-receiving surface light-transmissive substrate or a light-receiving surface light-transmissive film 1, a perovskite solar cell 2 laminated on the back surface thereof, a water vapor barrier layer 3 formed on the back side thereof so as to cover the solar cell 2, a sealing material 4 formed on the back side thereof so as to cover the water vapor barrier layer 3, and a back side substrate or a back side film 5 laminated on the outermost back surface on the sealing material 4.

[0046] Here, the light-receiving surface light-transmissive substrate or the light-receiving surface light-transmissive film 1 is a transparent member on the side where sunlight is incident, and a member having long-term reliable performance in outdoor use is required, including transparency, weather resistance, and impact resistance. Specific examples of the light-receiving surface light-transmissive substrate 1 include transparent glass, and blue plate glass and white plate tempered glass are preferred. Further, as the light-receiving surface light-transmissive film 1, it is preferable to use a light-transmissive film having high water vapor barrier properties.

[0047] As the perovskite solar cell 2, a structure in which an electron transport layer, a power generation layer formed of a perovskite compound, a hole transport layer, and a back electrode are laminated on the light-receiving surface light-transmissive substrate or the light-receiving surface light-transmissive film 1 is common, but it is not limited to this structure.

[0048] The water vapor barrier layer 3 is disposed by being applied to the back surface of the perovskite solar cell 2 so as to cover it without gaps, and it is desirable that it adheres well to the light-receiving surface light-transmissive substrate or the light-receiving surface light-transmissive film 1 and the perovskite solar cell 2.

[0049] The sealing material 4 installed on the back side of the perovskite solar cell 2 preferably has flexibility and transparency and can provide durability. As the back substrate 5, white plate glass, blue plate glass, etc. can be used. Examples of the back film 5 include a laminated film combining a fluororesin film and a polyethylene terephthalate (PET) film, a laminated film combining a metal thin film and a PET film, and a film obtained by vapor-depositing a thin metal layer on a polyethylene naphthalate (PEN) film, etc., a film in which water vapor permeation is controlled. When the back substrate or the back film 5 has light transmissivity, the obtained solar cell module becomes a through-type and the applicable range can be expanded.

[0050] [7] Manufacturing method of solar cell module The water vapor barrier layer can be formed by directly contacting the solar cell element coating composition of the present invention with the solar cell element and undergoing a curing process to cure it. The method of contacting the solar cell element coating composition is not particularly limited. For example, a dispensing method, a casting method, a dipping method, a roll coating method, a spraying method, a screen printing method, etc. are possible. Note that the film thickness of the water vapor barrier layer is not particularly limited. For example, when applied to an organic thin film solar cell and a perovskite solar cell, 1 to 3,000 μm is preferable, and 10 to 1,000 μm is more preferable. In addition, the solar cell element coating composition of the present invention may be applied, if necessary, via one or more other layers formed on the solar cell element, such as inorganic layers such as SiO, SiN, and AlO. When a plurality of layers are laminated on the solar cell element, it is also possible to use a cured product of the solar cell element coating composition of the present invention as a buffer film between the layers. Furthermore, methods such as laminating a film obtained by curing the solar cell element coating composition of the present invention can be used.

[0051] When curing the solar cell element coating composition of the present invention, the activation of the platinum group metal catalyst is performed by light irradiation with a wavelength of 200 to 500 nm, preferably 200 to 370 nm. For light irradiation, a UV-LED lamp, a metal halide lamp, a mercury lamp, etc. can be used. From the viewpoints of the curing rate of the composition and prevention of discoloration, the irradiation intensity is preferably 30 to 2,000 mW / cm 2 and the irradiation dose is preferably 3,000 to 100,000 mJ / cm 2 The temperature during irradiation is not particularly limited as long as it does not adversely affect the solar cell element, but 10 to 60 °C is preferable, and 20 to 40 °C is more preferable.

[0052] Also, after the above light irradiation, heating may be performed within a range that does not adversely affect the solar cell element. The heating temperature is preferably 50 °C to 100 °C, and more preferably 60 to 80 °C. The heating time is preferably 1 to 60 minutes, and more preferably 10 to 30 minutes.

Examples

[0053] Hereinafter, the present invention will be specifically described with reference to Examples and Comparative Examples, but the present invention is not limited to the following Examples. In the following formulas, Me represents a methyl group and Ph represents a phenyl group.

[0054] [Examples 1-1 to 1-3, Comparative Examples 1-1 to 1-4] The following components (A) to (D) were mixed in the compounding amounts (parts by mass) shown in Table 1 to prepare a solar cell element coating composition.

[0055] Component (A) A mixture of polymers in which m in the above structural formula (1) is 1 to 5 (content ratio of addition-reactive carbon-carbon double bonds: 0.47 mol / 100 g)

[0056] Component (B) (B-1) A compound represented by the following structural formula (I) (kinematic viscosity at 23°C: 1.8 mm 2 / s, content of silicon atom-bonded hydrogen atoms: 0.0092 mol / g)

Chemical formula

[0057] (B-2) An addition product of phenyltrivinylsilane and 1,4-bis(dimethylsilyl)benzene, a mixture of compounds represented by the following structural formulas (a) to (d) [(a):(b):(c):(d) = 55:25:10:15 (molar ratio), kinematic viscosity at 23°C: 30,000 mm 2 / s, average content of silicon atom-bonded hydrogen atoms: 0.0035 mol / g]

Chemical formula

Chemical formula

Chemical formula

Chemical formula

[0058] (B-3) A compound represented by the following structural formula (kinematic viscosity at 23°C: 21.4 mm 2 / s, content of silicon atom-bonded hydrogen atoms: 0.0069 mol / g) [Chemical formula] (In the formula, the arrangement of each siloxane unit with parentheses is random, alternating, or block.)

[0059] (B-4) A compound represented by the following structural formula (kinematic viscosity at 23°C: 65 mm 2 / s, content of silicon atom-bonded hydrogen atoms: 0.0116 mol / g) [Chemical formula] (In the formula, the arrangement of each siloxane unit with parentheses is random, alternating, or block.)

[0060] (C) component A toluene solution of methylcyclopentadienyltrimethylplatinum complex with a platinum element content of 0.5 mass%

[0061] (D) component Bis(2,2-dimethyl-3-butynoxy)dimethylsilane

[0062] [Table 1]

[0063] [Examples 2-1 to 2-3, Comparative Examples 2-1 to 2-4] Using the solar cell element coating compositions obtained in Examples 1-1 to 1-3 and Comparative Examples 1-1 to 1-4, solar cell modules were manufactured according to the following procedure.

[0064] As shown in FIG. 2, a transparent conductive film was formed on a glass (size: 50×50 mm, thickness: 3.2 mm) which is a light-transmissive substrate 1 for the light-receiving surface. Further, an electron transport layer, a perovskite layer, and a hole transport layer were provided on top of it, and a perovskite solar cell 2 with a positive electrode formed on top was obtained. The perovskite layer was formed so as to be located at the center of the light-transmissive substrate 1 for the light-receiving surface (size: 25×25 mm). Next, a fluororesin adhesive tape (thickness: 0.25 mm, width: 3×3 mm, manufactured by Nakakigawa Kasei Kogyo Co., Ltd.) was provided as a dam material 6 on the outer periphery of the light-transmissive substrate 1 for the light-receiving surface. Then, the solar cell element coating composition of the present invention was applied onto the perovskite solar cell 2 so that the thickness became 0.1 mm, leveled, and then, using a metal halide lamp (HANDY UV-100, manufactured by OCR Co., Ltd.) from the outside at 25°C, the ultraviolet intensity was 10 mW / cm 2 and the ultraviolet irradiation was carried out so that the integrated irradiation dose became 30,000 mJ / cm 2 . Then, it was heated at 80°C for 30 minutes to cure the solar cell element coating composition, and a water vapor barrier layer 3 was obtained. Then, a glass (size: 50×50 mm, thickness: 3.2 mm) which is a back substrate 5 was placed on top of the dam material 6, and the back surface was fixed with a polyimide tape 7 so that the back substrate 5 would not come off, and a perovskite solar cell 11 was obtained.

[0065] In the obtained perovskite solar cell, light was irradiated from the direction of the light-transmissive substrate 1 using a simulated sunlight irradiation device, and the initial output (W0) was measured. Then, it was exposed to an environment of 60°C and 90% RH for 500 hours, and the output (W1) was measured again by the same method, and the output maintenance rate (%) was calculated. Output maintenance rate (%) = W1 / W0×100

[0066]

Table 2

[0067] As shown in Table 2, it can be seen that the perovskite solar cell module having a water vapor barrier layer composed of the solar cell coating compositions of Examples 1-1 to 1-3 exhibits a good output retention rate even when exposed to an environment of 60 °C and 90% RH for 500 hours. On the other hand, it can be seen that the perovskite solar cell modules using the compositions of Comparative Examples 1-1 to 1-4 show a significant output decrease after being exposed to an environment of 60 °C and 90% RH for 500 hours.

Explanation of Reference Signs

[0068] 1 Light-receiving surface light-transmissive substrate / light-receiving surface light-transmissive film 2 Perovskite solar cell 3 Water vapor barrier layer 4 Encapsulant 5 Back substrate / back-side film 6 Dam material 7 Polyimide tape 10 Perovskite solar cell 11 Perovskite solar cell

Claims

1. A solar cell element, and (A) A polymer represented by the following structural formula (1): 【Chemical 1】 [In the formula, each X is a divalent group independently represented by the following structural formula (2), each Y is a monovalent group independently represented by any one of the following structural formulas (3) to (5), each Y' is a divalent group independently represented by the following structural formula (6) or (7), and Me represents a methyl group. m is an integer from 0 to 12. 【Chemical Formula 2】 (In the formula, the asterisk (*) indicates the bonding site with the silicon atom.) 【Chemical Formula 3】 (In formulas (3) to (7), the asterisk (*) indicates the bonding site with the silicon atom, and the configuration at each asymmetric carbon may be either cis (exo) or trans (endo).)] (B) An organosilicon compound having at least 3 hydrogen atoms bonded to terminal silicon atoms in one molecule, and (C) A platinum group metal catalyst activated by light with a wavelength of 200 to 500 nm containing, wherein the component (C) contains a (η 5 -cyclopentadienyl) trialiphatic platinum compound or a bis(β-diketonato) platinum compound, and HRSiO 2 / 2 A solar cell module comprising a water vapor barrier layer made of a cured product of a solar cell element coating composition having no organohydrogensiloxane unit represented by (wherein R represents an organic group).

2. The solar cell module according to Claim 1, wherein the component (B) contains a compound represented by the following formula (I), an addition reaction product of phenyltrivinylsilane and 1,4-bis(dimethylsilyl)benzene represented by the following formula (II), or both. 【Chemical Formula 4】 [Chemical Formula 5] (In formula (II), n is an integer from 1 to 20.)

3. The solar cell module according to Claim 1 or 2, wherein the solar cell element is an organic thin film type or perovskite type solar cell element.

4. (A) A polymer represented by the following structural formula (1): 【Chemical Formula 6】 [In the formula, each X is a divalent group independently represented by the following structural formula (2), each Y is a monovalent group independently represented by any one of the following structural formulas (3) to (5), each Y' is a divalent group independently represented by the following structural formula (6) or (7), and Me represents a methyl group. m is an integer from 0 to 12. 【Chemical Formula 7】 (In the formula, the asterisk (*) indicates the bonding site with the silicon atom.) 【Chemical Formula 8】 (In formulas (3) to (7), the asterisk (*) indicates the bonding site with the silicon atom, and the configuration at each asymmetric carbon may be either cis (exo) or trans (endo).)] (B) An organosilicon compound having at least 3 hydrogen atoms bonded to terminal silicon atoms in one molecule, and (C) A platinum group metal catalyst activated by light with a wavelength of 200 to 500 nm containing, wherein the component (C) contains a (η 5 -cyclopentadienyl) trialiphatic platinum compound or a bis(β-diketonato) platinum compound, and, HRSiO 2 / 2 (In the formula, R represents an organic group.) A method for manufacturing a solar cell module, which comprises a step of bringing a solar cell element coating composition having no organohydrogensiloxane unit represented by the formula into contact with a solar cell element directly or via a layer and curing the composition by irradiation with light having a wavelength of 200 to 500 nm under atmospheric pressure.

5. The manufacturing method of the solar cell module according to claim 4, wherein the component (B) contains a compound represented by the following formula (I), an addition reaction product of phenyltrivinylsilane and 1,4-bis(dimethylsilyl)benzene represented by the following formula (II), or both of them. 【Chemical Formula 9】 【Chemical Formula 10】 (In the formula (II), n is an integer of 1 to 20.)

6. The manufacturing method of the solar cell module according to claim 4 or 5, wherein the solar cell element is an organic thin film type or perovskite type solar cell element.

Images