WO2010013659A1 - Film d'étanchéité pour cellule solaire et cellule solaire utilisant ce film - Google Patents

Film d'étanchéité pour cellule solaire et cellule solaire utilisant ce film Download PDF

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WO2010013659A1
WO2010013659A1 PCT/JP2009/063319 JP2009063319W WO2010013659A1 WO 2010013659 A1 WO2010013659 A1 WO 2010013659A1 JP 2009063319 W JP2009063319 W JP 2009063319W WO 2010013659 A1 WO2010013659 A1 WO 2010013659A1
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solar cell
sealing film
group
carbon atoms
ultraviolet absorber
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PCT/JP2009/063319
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English (en)
Japanese (ja)
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央尚 片岡
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株式会社ブリヂストン
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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/16—Nitrogen-containing compounds
    • C08K5/34—Heterocyclic compounds having nitrogen in the ring
    • C08K5/3467—Heterocyclic compounds having nitrogen in the ring having more than two nitrogen atoms in the ring
    • C08K5/3472—Five-membered rings
    • C08K5/3475—Five-membered rings condensed with carbocyclic rings
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/04—Oxygen-containing compounds
    • C08K5/14—Peroxides
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
    • H01L31/042—PV modules or arrays of single PV cells
    • H01L31/048—Encapsulation of modules
    • H01L31/0481—Encapsulation of modules characterised by the composition of the encapsulation material
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy

Definitions

  • the present invention relates to a solar cell encapsulating film comprising an ethylene-polar monomer copolymer as a main component, and more particularly to a solar cell encapsulating film excellent in UV cut sustainability.
  • a solar cell generally includes a light-receiving surface side transparent protective member 11 made of a glass substrate or the like, a light-receiving surface side sealing film 13A, a solar cell 14 such as a silicon power generation element, a back surface side sealing film. 13B and the back surface side protection member (back cover) 12 are laminated in this order, degassed under reduced pressure, and then heated and pressurized to crosslink and cure the light receiving surface side sealing film 13A and the back surface side sealing film 13B and adhere.
  • Manufactured by integrating In a conventional solar battery, a plurality of solar battery cells 14 are connected and used in order to obtain a high electric output. Therefore, in order to ensure insulation between the solar battery cells 14, the solar battery cells are sealed using the sealing films 13A and 13B having insulation properties.
  • a film made of an ethylene-polar monomer copolymer such as an ethylene vinyl acetate copolymer (EVA) film or an ethylene ethyl acrylate copolymer (EEA) film is preferable.
  • EVA ethylene vinyl acetate copolymer
  • ESA ethylene ethyl acrylate copolymer
  • Patent Document 1 a crosslinking density such as an organic peroxide is used in the sealing film in addition to the ethylene-polar monomer copolymer to improve the crosslinking density.
  • a transparent substrate such as a glass substrate is used as a light-transmitting light-receiving surface side protective material used in a conventional solar cell in order to make sunlight enter the battery as efficiently as possible and collect it on the solar cell. ing.
  • the back side protective material includes a plastic film such as polyethylene terephthalate (PET) or a film in which a vapor deposition film made of silver is formed on the surface of the plastic film in order to prevent moisture from entering the battery. It is used. In addition to the conventional function of preventing the ingress of moisture by adding a colorant to the back side protective material, it improves the reflectance of incident light to increase the power generation efficiency of the battery and improve the design Is planned.
  • PET polyethylene terephthalate
  • a film in which a vapor deposition film made of silver is formed on the surface of the plastic film in order to prevent moisture from entering the battery. It is used.
  • PET polyethylene terephthalate
  • a vapor deposition film made of silver is formed on the surface of the plastic film in order to prevent moisture from entering the battery.
  • the back side protective material such as a PET film may turn yellow due to the influence of light and heat. Yellowing of the back surface side protective material causes not only a decrease in power generation performance due to a decrease in the reflectance of incident light but also a decrease in design. Therefore, in the conventional solar cell, deterioration of the back surface side protective material has been prevented by adding an ultraviolet absorber to the sealing film to suppress the transmission of ultraviolet rays.
  • the conventional solar cell sealing film still has a problem in that it cannot maintain sufficient UV-cutting properties.
  • an object of the present invention is to provide a solar cell sealing film that can maintain excellent ultraviolet cut-off properties over a long period of time.
  • the present inventor has a benzotriazole-based ultraviolet absorber represented by the following formula (1), and can maintain a high ultraviolet cutting property for a long period of time. It has been found that a sealing film can be obtained.
  • the present invention is a solar cell sealing film comprising an ethylene-polar monomer copolymer, an organic peroxide, and an ultraviolet absorber,
  • the ultraviolet absorber is represented by the following formula (1)
  • a benzotriazole-based ultraviolet absorber represented by a hydrogen atom, an alkyl group having 1 to 20 carbon atoms, or an alkyloxycarbonyl group having 3 to 22 carbon atoms.
  • R 1 represents a chlorine atom or a hydrogen atom
  • R 2 and R 3 are different from each other and represent an alkyl group having 1 to 20 carbon atoms.
  • the benzotriazole ultraviolet absorber is 2- (2H-1,2,3-benzotriazol-2-yl) -6-dodecyl-4-methylphenol and / or 2- (5-chloro-2H -1,2,3-benzotriazol-2-yl) -4-methyl-6-tert-butylphenol.
  • the benzotriazole-based ultraviolet absorber has little photodegradation and has excellent durability. Furthermore, the benzotriazole-based ultraviolet absorber is excellent in the ability to cut ultraviolet rays having wavelengths (about 325 nm and about 380 nm) that promote the deterioration of the back surface side protective material such as a PET film. Therefore, the solar cell sealing film containing the benzotriazole-based ultraviolet absorber can maintain the UV-cutting property for a long period of time, and can highly suppress the photodegradation of the back surface side protective material such as a PET film. It becomes possible.
  • the solar cell sealing film of the present invention contains, as basic components, an ethylene-polar monomer copolymer, an organic peroxide, and an ultraviolet absorber, and the ultraviolet absorber has the following formula (1):
  • R 1 represents a hydrogen atom, a halogen atom, an alkyl group having 1 to 6 carbon atoms, or a haloalkyl group having 1 to 6 carbon atoms
  • R 2 and R 3 are the same
  • a benzotriazole-based ultraviolet absorber represented by a hydrogen atom, an alkyl group having 1 to 20 carbon atoms, or an alkyloxycarbonyl group having 3 to 22 carbon atoms.
  • halogen atom for R 1 in the formula (1) examples include a fluorine atom, a chlorine atom, an iodine atom, and a bromine atom. Of these, a chlorine atom is particularly preferable.
  • the alkyl group having 1 to 6 carbon atoms in R 1 of the formula (1) may be a linear or branched alkyl group.
  • Specific examples of the alkyl group include methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, tert-butyl, sec-butyl, n-pentyl, isopentyl, and neopentyl.
  • the haloalkyl group having 1 to 6 carbon atoms in R 1 of the above formula (1) has at least one halogen atom as a substituent in a linear or branched alkyl group.
  • Examples of the alkyl group and the halogen atom are the same as those described above.
  • Preferred examples of the haloalkyl group include a chloromethyl group and a chlorobutyl group.
  • R 1 in the formula (1) a hydrogen atom or a chlorine atom is particularly preferable.
  • Examples of the alkyl group having 1 to 20 carbon atoms in R 2 and R 3 in the formula (1) include a methyl group, an ethyl group, an n-propyl group, an isopropyl group, an n-butyl group, an isobutyl group, and a tert-butyl group.
  • the alkyloxycarbonyl group having 3 to 22 carbon atoms in R 2 and R 3 in the formula (1) may be a linear or branched alkyloxycarbonyl group. Specifically, methoxycarbonyl group, ethoxycarbonyl group, isopropoxycarbonyl group, n-butoxycarbonyl group, isobutoxycarbonyl group, sec-butoxycarbonyl group, tert-butoxycarbonyl group, n-hexyloxycarbonyl group, and n -Octyloxycarbonyl group and the like.
  • R 2 and R 3 may be the same or different, but are preferably different from each other.
  • R 2 and R 3 are preferably alkyl groups having 1 to 20 carbon atoms, particularly 1 to 15 carbon atoms.
  • R 2 is preferably an alkyl group having 3 to 15 carbon atoms
  • R 3 is preferably an alkyl group having 1 to 3 carbon atoms
  • R 2 is a methyl group
  • R 3 is A tert-butyl group, a tert-pentyl group, a decyl group, a dodecyl group, an undecyl group, a tridecyl group, a tetradecyl group, or a pentadecyl group is preferred.
  • benzotriazole ultraviolet absorber represented by the formula (1) examples include 2- (2H-1,2,3-benzotriazol-2-yl) -4,6-di-tert-butylphenol; 2- (5-Chloro-2H-1,2,3-benzotriazol-2-yl) -4,6-di-tert-butylphenol; 2- (2H-1,2,3-benzotriazol-2-yl ) -4-tert-octylphenol; 2- (2H-1,2,3-benzotriazol-2-yl) -4,6-di-tert-pentylphenol; 2- (5-chloro-2H-1,2 , 3-Benzotriazol-2-yl) -4,6-di-tert-pentylphenol; 2- (2H-1,2,3-benzotriazol-2-yl) -4-tert-butylphenol; -(5-Chloro-2H-1,2,3-benzotriazol-2-yl) -4-ter
  • the mass ratio (A: B) of the benzotriazole-based ultraviolet absorber (A) and the organic peroxide (B) in the solar cell sealing film of the present invention is 90:10 to 10:90, particularly 80:20. It is preferably ⁇ 20: 80.
  • the functions of the crosslinking agent and the ultraviolet absorber may be deactivated by these reactions. For example, if the amount of the crosslinking agent is too large relative to the ultraviolet absorber, the UV trapping function of the ultraviolet absorber may be reduced by the generated radicals.
  • the content of the benzotriazole-based ultraviolet absorber in the solar cell sealing film of the present invention is 0.1 to 1.0 part by mass, particularly 0.5 to 100 parts by mass of the ethylene-polar monomer copolymer.
  • the amount is preferably 1.0 parts by mass. If it is the said content, it can be set as the sealing film which has high ultraviolet-ray cut property, without reducing transparency.
  • Examples of the polar monomer of the ethylene-polar monomer copolymer used in the solar cell sealing film of the present invention include unsaturated carboxylic acid, its salt, its ester, its amide, vinyl ester, carbon monoxide and the like. Can do.
  • unsaturated carboxylic acids such as acrylic acid, methacrylic acid, fumaric acid, itaconic acid, monomethyl maleate, monoethyl maleate, maleic anhydride, itaconic anhydride, lithium of these unsaturated carboxylic acids, sodium
  • Monovalent metal salts such as potassium
  • polyvalent metal salts such as magnesium, calcium and zinc
  • unsaturated carboxylic acid esters such as ethyl methacrylate, isobutyl methacrylate and dimethyl maleate
  • vinyl esters such as vinyl acetate and vinyl propionate.
  • the ethylene-polar monomer copolymer includes ethylene-acrylic acid copolymer, ethylene-unsaturated carboxylic acid copolymer such as ethylene-methacrylic acid copolymer, and the ethylene-unsaturated carboxylic acid copolymer.
  • the ethylene-polar monomer copolymer is most preferably an ethylene vinyl acetate copolymer (EVA).
  • EVA ethylene vinyl acetate copolymer
  • the ethylene vinyl acetate copolymer has excellent compatibility with the benzotriazole-based UV absorber represented by the above formula (1), has no yellowing caused by the addition of the benzotriazole-based UV absorber, and has excellent UV-cutting properties. It can be demonstrated.
  • the content of vinyl acetate in the ethylene vinyl acetate copolymer is 20 to 35 parts by weight, more preferably 22 to 30 parts by weight, particularly 24 to 28 parts by weight, based on 100 parts by weight of the ethylene vinyl acetate copolymer. preferable. If the vinyl acetate content is less than 20 parts by mass, the sealing film obtained when crosslinked and cured at high temperatures may not have sufficient transparency. If it exceeds 35 parts by mass, carboxylic acid, alcohol, etc. are generated. There is a risk that it will be easier to do.
  • the solar cell sealing film of the present invention contains an organic peroxide as a crosslinking agent. Thereby, a crosslinked cured film of an ethylene-polar monomer copolymer can be obtained, and the sealing performance of the solar cell can be improved.
  • Any organic peroxide may be used as long as it decomposes at a temperature of 100 ° C. or higher to generate radicals.
  • the organic peroxide is generally selected in consideration of the film formation temperature, the adjustment conditions of the composition, the curing temperature, the heat resistance of the adherend, and the storage stability. In particular, those having a decomposition temperature of 70 hours or more with a half-life of 10 hours are preferred.
  • organic peroxide examples include 2,5-dimethylhexane-2,5-dihydroperoxide, 2,5-dimethyl-2,5-bis (t, from the viewpoint of processing temperature and storage stability of the resin.
  • -Butylperoxy) hexane t-butylcumyl peroxide, 2,5-dimethyl-2,5-di (t-butylperoxy) hexane, dicumyl peroxide, ⁇ , ⁇ '-bis (t-butylperoxide Oxyisopropyl) benzene, n-butyl-4,4-bis (t-butylperoxy) valerate, 2,2-bis (t-butylperoxy) butane, 1,1-bis (t-butylperoxy) cyclohexane 1,1-bis (t-butylperoxy) trimethylcyclohexane, 1,1-bis (t-butylperoxy) -3,3,5-trimethylcyclohe
  • the content of the crosslinking agent comprising an organic peroxide is preferably 0.1 to 2.0, more preferably 0.3 to 1 with respect to 100 parts by mass of the ethylene-polar monomer copolymer. 0.5 parts by mass, particularly preferably 0.6 to 1.5 parts by mass is preferred. If the content of the organic peroxide is small, the transparency of the resulting sealing film may be lowered, and if it is increased, the compatibility with the copolymer may be deteriorated.
  • the composition of the present invention may contain a crosslinking aid as necessary.
  • the crosslinking aid can be added to the composition in order to improve the gel fraction of the ethylene-polar monomer copolymer and improve the durability.
  • a crosslinking aid compound having a radical polymerizable group as a functional group
  • a trifunctional crosslinking aid such as triallyl cyanurate and triallyl isocyanurate, (meth) acrylic ester
  • examples thereof include monofunctional or bifunctional crosslinking aids such as NK ester.
  • triallyl cyanurate and triallyl isocyanurate are preferable, and triallyl isocyanurate is particularly preferable.
  • These crosslinking aids are generally used in an amount of 10 parts by mass or less, preferably 0.1 to 5 parts by mass with respect to 100 parts by mass of the ethylene-polar monomer copolymer.
  • the composition is used for improving or adjusting various physical properties of the film (optical properties such as mechanical strength, adhesiveness, transparency, heat resistance, light resistance, crosslinking speed, etc.), particularly for improving mechanical strength.
  • various additives such as a plasticizer, an adhesion improver, an acryloxy group-containing compound, a methacryloxy group-containing compound, and / or an epoxy group-containing compound may further be included.
  • the plasticizer is not particularly limited, but polybasic acid esters and polyhydric alcohol esters are generally used. Examples thereof include dioctyl phthalate, dihexyl adipate, triethylene glycol-di-2-ethylbutyrate, butyl sebacate, tetraethylene glycol diheptanoate, and triethylene glycol dipelargonate.
  • One type of plasticizer may be used, or two or more types may be used in combination.
  • the plasticizer content is preferably in the range of 5 parts by mass or less with respect to 100 parts by mass of the ethylene-polar monomer copolymer.
  • a silane coupling agent can be used as the adhesion improver. Thereby, it becomes possible to form the sealing film for solar cells which has the outstanding adhesive force.
  • the silane coupling agent include ⁇ -chloropropylmethoxysilane, vinylethoxysilane, vinyltris ( ⁇ -methoxyethoxy) silane, ⁇ -methacryloxypropyltrimethoxysilane, vinyltriacetoxysilane, ⁇ -glycidoxypropyltrimethoxy.
  • the content of the adhesion improver is preferably 5 parts by mass or less with respect to 100 parts by mass of the ethylene-polar monomer copolymer.
  • the acryloxy group-containing compound and the methacryloxy group-containing compound are generally acrylic acid or methacrylic acid derivatives, and examples thereof include acrylic acid or methacrylic acid esters and amides.
  • ester residues include linear alkyl groups such as methyl, ethyl, dodecyl, stearyl, lauryl, cyclohexyl group, tetrahydrofurfuryl group, aminoethyl group, 2-hydroxyethyl group, 3-hydroxypropyl group And 3-chloro-2-hydroxypropyl group.
  • Examples of amides include diacetone acrylamide.
  • polyhydric alcohols such as ethylene glycol, triethylene glycol, polypropylene glycol, polyethylene glycol, trimethylolpropane, and pentaerythritol, and esters of acrylic acid or methacrylic acid can also be used.
  • epoxy-containing compound examples include triglycidyl tris (2-hydroxyethyl) isocyanurate, neopentyl glycol diglycidyl ether, 1,6-hexanediol diglycidyl ether, allyl glycidyl ether, 2-ethylhexyl glycidyl ether, phenyl glycidyl ether, Mention may be made of phenol (ethyleneoxy) 5 glycidyl ether, pt-butylphenyl glycidyl ether, adipic acid diglycidyl ester, phthalic acid diglycidyl ester, glycidyl methacrylate and butyl glycidyl ether.
  • the acryloxy group-containing compound, the methacryloxy group-containing compound, or the epoxy group-containing compound is generally 0.5 to 5.0 parts by mass, particularly 1.0 to 100 parts by mass of the ethylene-polar monomer copolymer, respectively. It is preferably contained in an amount of ⁇ 4.0 parts by mass.
  • the solar cell sealing film of the present invention may contain a light stabilizer and / or an anti-aging agent.
  • the solar cell sealing film contains a light stabilizer, the deterioration of the ethylene-polar monomer copolymer due to the influence of irradiated light or the like, and the solar cell sealing film are prevented from yellowing. be able to.
  • a light stabilizer called a hindered amine type is preferably used.
  • LA-52, LA-57, LA-62, LA-63LA-63p, LA-67, LA-68 (all ( ADEKA Co., Ltd.), Tinuvin 744, Tinuvin 770, Tinuvin 765, Tinuvin 144, Tinuvin 622LD, CHIMASSORB 944LD (all manufactured by Ciba Specialty Chemicals Co., Ltd.), UV-3034 (BF Goodrich) Can be mentioned.
  • the light stabilizer may be used alone or in combination of two or more kinds, and the blending amount is 0.01 to 5 parts by mass with respect to 100 parts by mass of the ethylene-polar monomer copolymer. It is preferable that
  • anti-aging agent examples include hindered phenol antioxidants such as N, N′-hexane-1,6-diylbis [3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionamide]. , Phosphorus heat stabilizers, lactone heat stabilizers, vitamin E heat stabilizers, sulfur heat stabilizers, and the like.
  • the solar cell sealing film of the present invention described above may be formed according to a known method.
  • the composition containing the various components described above can be produced by a method of obtaining a sheet-like material by molding by ordinary extrusion molding, calendar molding (calendering) or the like.
  • a sheet-like material can be obtained by dissolving the composition in a solvent and coating the solution on a suitable support with a suitable coating machine (coater) and drying to form a coating film.
  • a suitable coating machine coater
  • heating is generally in the range of 50 to 90 ° C.
  • the thickness of the solar cell sealing film is not particularly limited, but may be in the range of 50 ⁇ m to 2 mm.
  • the solar cell sealing film of the present invention described above contains a benzotriazole-based ultraviolet absorber that has little photodegradation and has excellent durability.
  • the said benzotriazole type ultraviolet absorber is excellent in the cut property of the ultraviolet-ray which has a wavelength (about 325 nm, about 380 nm) which accelerates
  • a wavelength about 325 nm, about 380 nm
  • the solar cell sealing film of the present invention has a light transmittance of a wavelength of 325 nm of 0.3% or less and a light transmittance of a wavelength of 380 nm of 1.5% or less. Therefore, the solar cell sealing film can maintain an excellent ultraviolet cut property over a long period of time.
  • the solar cell sealing film of the present invention is subjected to an accelerated weathering test (after irradiation with ultraviolet rays having an ultraviolet intensity of 100 mW / cm 2 at 300 to 400 nm in air at a temperature of 63 ° C. and a humidity of 50% RH for 300 hours. ),
  • the YI value difference ( ⁇ YI value) is 7 or less.
  • the structure of the solar cell using such a solar cell sealing film is not particularly limited, but the solar cell sealing film is interposed between the light-receiving surface side transparent protective member and the back surface side protective member.
  • crosslinking integration are mentioned.
  • the light receiving surface side transparent protective member 11 the light receiving surface side sealing film 13A, the solar cell 14 and the back surface side sealing.
  • the film 13B and the back surface side protection member 12 may be laminated, and the sealing film may be cross-linked and cured according to a conventional method such as heat and pressure.
  • the laminate is heated with a vacuum laminator at a temperature of 135 to 180 ° C., further 140 to 180 ° C., particularly 155 to 180 ° C., a degassing time of 0.1 to 5 minutes, and a press pressure of 0.1.
  • Heat pressing may be performed at a pressure of ⁇ 1.5 kg / cm 2 and a press time of 5 to 15 minutes.
  • the ethylene-polar monomer copolymer contained in the light receiving surface side sealing film 13A and the back surface side sealing film 13B is cross-linked, whereby the light receiving surface side sealing film 13A and the back surface side sealing film 13B.
  • the solar cell 14 can be sealed by integrating the light-receiving surface-side transparent protective member 11, the back-side transparent member 12, and the solar cell 14.
  • the sealing film containing the benzotriazole-based ultraviolet absorber is preferably used as at least a back surface side sealing film, and is used as both a light receiving surface side sealing film and a back surface side sealing film. Is more preferable.
  • the side of the solar cell irradiated with light is referred to as “light receiving surface side”, and the side opposite to the light receiving surface of the solar cell is referred to as “back surface side”.
  • the light-receiving surface side transparent protective member used for the solar cell of the present invention is usually a glass substrate such as silicate glass.
  • the thickness of the glass substrate is generally from 0.1 to 10 mm, and preferably from 0.3 to 5 mm.
  • the glass substrate may generally be chemically or thermally strengthened.
  • the back surface side protective member used in the present invention is a plastic film such as PET.
  • a fluorinated polyethylene film particularly a fluorinated polyethylene film / Al / fluorinated polyethylene film, in this order.
  • a film laminated with is preferable.
  • the solar cell of this invention has the characteristics in the sealing film used for a light-receiving surface side and a back surface side as mentioned above. Therefore, the members other than the sealing film such as the light-receiving surface-side transparent protective member, the back-side protective member, and the solar cell need only have the same configuration as a conventionally known solar cell, and are particularly limited. Not.
  • Example 1 The materials shown in Table 1 were supplied to a roll mill and kneaded at 70 ° C., and the resulting composition was calendered at 70 ° C., allowed to cool, and then sealed for solar cells (thickness: 1.0 mm). Got.
  • Examples 2 to 19 and Comparative Examples 1 to 6 As shown in Tables 1 to 4, a solar cell sealing film was prepared in the same manner as in Example 1 except that the type and / or addition amount of the ultraviolet absorber was changed.
  • the integrated laminate was subjected to 300 ° C. in an air with a temperature of 63 ° C. and a humidity of 50% RH using an accelerated weathering tester (S-UV tester, manufactured by Iwasaki Electric Co., Ltd.) using a 4 KW metal halide lamp as a light source. It was taken out after being irradiated with ultraviolet rays having an ultraviolet intensity of 100 mW / cm 2 at ⁇ 400 nm for 300 hours.
  • S-UV tester accelerated weathering tester
  • the solar cell sealing film of the present invention can cut the transmission of light with a wavelength of 325 nm and a wavelength of 380 nm to a high level even after the accelerated weathering test,
  • the degree ( ⁇ YI value) is also extremely low. That is, even after the accelerated weather resistance test, the light transmittance at a wavelength of 325 nm is 0.5% or less, the light transmittance at a wavelength of 380 nm is 2.0% or less, and the difference in YI values is 13 or less. It is. From these, it can be seen that the solar cell sealing film of the present invention is capable of maintaining excellent ultraviolet cutting property and transparency over a long period of time.
  • the solar cell sealing film of the present invention it is possible to provide a solar cell capable of exhibiting excellent design and power generation performance over a long period of time.

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Abstract

L'invention concerne un film d'étanchéité pour cellules solaires qui peut maintenir d'excellentes propriétés de blocage du rayonnement ultraviolet pendant longtemps. Le film d'étanchéité pour cellules solaires contient un copolymère éthylène-monomère polaire, un peroxyde organique et un absorbant du rayonnement ultraviolet, et est caractérisé en ce que l'absorbant ultraviolet est un absorbant ultraviolet benzotriazole représenté par la formule (1). (dans la formule, R1 représente un atome d'hydrogène, un atome d'un halogène, un groupe alkyle possédant de 1 à 6 atomes de carbone ou un groupe haloalkyle possédant de 1 à 6 atomes de carbone ; et R2 et R3 peuvent être identiques ou différents, chacun représentant un atome d'hydrogène, un groupe alkyle possédant de 1 à 20 atomes de carbone ou un groupe alkyloxycarbonyle possédant de 3 à 22 atomes de carbone).
PCT/JP2009/063319 2008-07-29 2009-07-27 Film d'étanchéité pour cellule solaire et cellule solaire utilisant ce film WO2010013659A1 (fr)

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JP2008194998A JP2011201928A (ja) 2008-07-29 2008-07-29 太陽電池用封止膜、及びこれを用いた太陽電池
JP2008-194998 2008-07-29

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WO2013190940A1 (fr) * 2012-06-19 2013-12-27 三井化学東セロ株式会社 Matériau d'étanchéité de photopile et module solaire

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* Cited by examiner, † Cited by third party
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JP5819159B2 (ja) * 2011-10-21 2015-11-18 株式会社ブリヂストン 太陽電池用封止膜及びこれを用いた太陽電池
US9666739B2 (en) 2013-06-28 2017-05-30 Sunpower Corporation Photovoltaic cell and laminate metallization

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09191116A (ja) * 1996-01-10 1997-07-22 Canon Inc 太陽電池モジュール
JP2002228803A (ja) * 2001-01-30 2002-08-14 Konica Corp 低反射積層体の製造方法及び低反射積層体
JP2006134970A (ja) * 2004-11-02 2006-05-25 Mitsui Chemical Fabro Inc 太陽電池封止用シート
JP2009152543A (ja) * 2007-11-29 2009-07-09 Bridgestone Corp 太陽電池用封止膜及びこれを用いた太陽電池

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09191116A (ja) * 1996-01-10 1997-07-22 Canon Inc 太陽電池モジュール
JP2002228803A (ja) * 2001-01-30 2002-08-14 Konica Corp 低反射積層体の製造方法及び低反射積層体
JP2006134970A (ja) * 2004-11-02 2006-05-25 Mitsui Chemical Fabro Inc 太陽電池封止用シート
JP2009152543A (ja) * 2007-11-29 2009-07-09 Bridgestone Corp 太陽電池用封止膜及びこれを用いた太陽電池

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013190940A1 (fr) * 2012-06-19 2013-12-27 三井化学東セロ株式会社 Matériau d'étanchéité de photopile et module solaire
CN104380481A (zh) * 2012-06-19 2015-02-25 三井化学东赛璐株式会社 太阳能电池密封材及太阳能电池模块
JPWO2013190940A1 (ja) * 2012-06-19 2016-05-26 三井化学東セロ株式会社 太陽電池封止材および太陽電池モジュール

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