KR20210041142A - A composite adhesive film for photovoltaic cell - Google Patents
A composite adhesive film for photovoltaic cell Download PDFInfo
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- KR20210041142A KR20210041142A KR1020190122847A KR20190122847A KR20210041142A KR 20210041142 A KR20210041142 A KR 20210041142A KR 1020190122847 A KR1020190122847 A KR 1020190122847A KR 20190122847 A KR20190122847 A KR 20190122847A KR 20210041142 A KR20210041142 A KR 20210041142A
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- adhesive film
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- eva
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- 239000002313 adhesive film Substances 0.000 title claims abstract description 48
- 239000002131 composite material Substances 0.000 title claims abstract description 13
- -1 carbodiimide compound Chemical class 0.000 claims abstract description 32
- 239000000203 mixture Substances 0.000 claims abstract description 28
- 239000004711 α-olefin Substances 0.000 claims abstract description 24
- 229920000089 Cyclic olefin copolymer Polymers 0.000 claims abstract description 22
- 239000003431 cross linking reagent Substances 0.000 claims abstract description 12
- 239000004611 light stabiliser Substances 0.000 claims abstract description 10
- 239000000126 substance Substances 0.000 claims description 7
- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 4
- 125000003187 heptyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 claims description 3
- MMCOUVMKNAHQOY-UHFFFAOYSA-L oxido carbonate Chemical group [O-]OC([O-])=O MMCOUVMKNAHQOY-UHFFFAOYSA-L 0.000 claims description 3
- 125000003386 piperidinyl group Chemical group 0.000 abstract 1
- 239000005038 ethylene vinyl acetate Substances 0.000 description 22
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 22
- 229940116351 sebacate Drugs 0.000 description 10
- CXMXRPHRNRROMY-UHFFFAOYSA-L sebacate(2-) Chemical compound [O-]C(=O)CCCCCCCCC([O-])=O CXMXRPHRNRROMY-UHFFFAOYSA-L 0.000 description 10
- 238000004383 yellowing Methods 0.000 description 9
- 238000003490 calendering Methods 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- BRQMAAFGEXNUOL-UHFFFAOYSA-N 2-ethylhexyl (2-methylpropan-2-yl)oxy carbonate Chemical compound CCCCC(CC)COC(=O)OOC(C)(C)C BRQMAAFGEXNUOL-UHFFFAOYSA-N 0.000 description 4
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 4
- 239000005977 Ethylene Substances 0.000 description 4
- 150000001875 compounds Chemical class 0.000 description 4
- 229920001577 copolymer Polymers 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 3
- 239000002253 acid Substances 0.000 description 3
- 239000003054 catalyst Substances 0.000 description 3
- 238000001125 extrusion Methods 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 230000014759 maintenance of location Effects 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 238000010248 power generation Methods 0.000 description 3
- 230000001681 protective effect Effects 0.000 description 3
- VXNZUUAINFGPBY-UHFFFAOYSA-N 1-Butene Chemical compound CCC=C VXNZUUAINFGPBY-UHFFFAOYSA-N 0.000 description 2
- AFFLGGQVNFXPEV-UHFFFAOYSA-N 1-decene Chemical compound CCCCCCCCC=C AFFLGGQVNFXPEV-UHFFFAOYSA-N 0.000 description 2
- CRSBERNSMYQZNG-UHFFFAOYSA-N 1-dodecene Chemical compound CCCCCCCCCCC=C CRSBERNSMYQZNG-UHFFFAOYSA-N 0.000 description 2
- KWKAKUADMBZCLK-UHFFFAOYSA-N 1-octene Chemical compound CCCCCCC=C KWKAKUADMBZCLK-UHFFFAOYSA-N 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- IAQRGUVFOMOMEM-UHFFFAOYSA-N but-2-ene Chemical compound CC=CC IAQRGUVFOMOMEM-UHFFFAOYSA-N 0.000 description 2
- 150000001718 carbodiimides Chemical class 0.000 description 2
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 230000001678 irradiating effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 2
- 150000001451 organic peroxides Chemical class 0.000 description 2
- YWAKXRMUMFPDSH-UHFFFAOYSA-N pentene Chemical compound CCCC=C YWAKXRMUMFPDSH-UHFFFAOYSA-N 0.000 description 2
- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 2
- 239000010409 thin film Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- VCQJVYAKUUDOLB-UHFFFAOYSA-N 3,3-dimethylbut-1-ene Chemical compound CC(C)(C)C=C.CC(C)(C)C=C VCQJVYAKUUDOLB-UHFFFAOYSA-N 0.000 description 1
- DHYFYDYQEUCFPK-UHFFFAOYSA-N 3-methylbut-1-ene Chemical compound CC(C)C=C.CC(C)C=C DHYFYDYQEUCFPK-UHFFFAOYSA-N 0.000 description 1
- LDTAOIUHUHHCMU-UHFFFAOYSA-N 3-methylpent-1-ene Chemical compound CCC(C)C=C LDTAOIUHUHHCMU-UHFFFAOYSA-N 0.000 description 1
- ZMDPSAZWSOCFGE-UHFFFAOYSA-N 4-methylpent-1-ene Chemical compound CC(CC=C)C.CC(CC=C)C ZMDPSAZWSOCFGE-UHFFFAOYSA-N 0.000 description 1
- 229920002799 BoPET Polymers 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 238000002835 absorbance Methods 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 125000000217 alkyl group Chemical group 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000004956 cell adhesive effect Effects 0.000 description 1
- 239000012986 chain transfer agent Substances 0.000 description 1
- 238000006482 condensation reaction Methods 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 238000007334 copolymerization reaction Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 238000005261 decarburization Methods 0.000 description 1
- 125000002704 decyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- XNMQEEKYCVKGBD-UHFFFAOYSA-N dimethylacetylene Natural products CC#CC XNMQEEKYCVKGBD-UHFFFAOYSA-N 0.000 description 1
- 229940069096 dodecene Drugs 0.000 description 1
- 125000003438 dodecyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000010408 film Substances 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 238000001879 gelation Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- GXNDYZPMZKJDSS-UHFFFAOYSA-N hex-1-ene Chemical compound CCCCC=C.CCCCC=C GXNDYZPMZKJDSS-UHFFFAOYSA-N 0.000 description 1
- 125000004051 hexyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 1
- 239000003999 initiator Substances 0.000 description 1
- 125000001972 isopentyl group Chemical group [H]C([H])([H])C([H])(C([H])([H])[H])C([H])([H])C([H])([H])* 0.000 description 1
- 125000001449 isopropyl group Chemical group [H]C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 1
- 150000002576 ketones Chemical class 0.000 description 1
- 125000002960 margaryl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- TVMXDCGIABBOFY-UHFFFAOYSA-N n-Octanol Natural products CCCCCCCC TVMXDCGIABBOFY-UHFFFAOYSA-N 0.000 description 1
- 125000001400 nonyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 125000000913 palmityl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 125000001147 pentyl group Chemical group C(CCCC)* 0.000 description 1
- 150000002978 peroxides Chemical class 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 1
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 125000002914 sec-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 125000004079 stearyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 238000009281 ultraviolet germicidal irradiation Methods 0.000 description 1
- 150000003682 vanadium compounds Chemical class 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
- C09J7/38—Pressure-sensitive adhesives [PSA]
- C09J7/381—Pressure-sensitive adhesives [PSA] based on macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
- C09J7/387—Block-copolymers
-
- 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
- C08K5/09—Carboxylic acids; Metal salts thereof; Anhydrides thereof
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J123/00—Adhesives based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Adhesives based on derivatives of such polymers
- C09J123/02—Adhesives based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Adhesives based on derivatives of such polymers not modified by chemical after-treatment
- C09J123/04—Homopolymers or copolymers of ethene
- C09J123/08—Copolymers of ethene
- C09J123/0807—Copolymers of ethene with unsaturated hydrocarbons only containing more than three carbon atoms
- C09J123/0815—Copolymers of ethene with aliphatic 1-olefins
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J123/00—Adhesives based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Adhesives based on derivatives of such polymers
- C09J123/02—Adhesives based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Adhesives based on derivatives of such polymers not modified by chemical after-treatment
- C09J123/04—Homopolymers or copolymers of ethene
- C09J123/08—Copolymers of ethene
- C09J123/0846—Copolymers of ethene with unsaturated hydrocarbons containing other atoms than carbon or hydrogen atoms
- C09J123/0853—Vinylacetate
-
- 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
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Photovoltaic Devices (AREA)
- Adhesives Or Adhesive Processes (AREA)
Abstract
Description
본 발명은 에틸렌-α-올레핀 공중합체 및 에틸렌-비닐아세테이트 공중합체(EVA)의 혼합물계 태양광 전지 셀용 복합 점착 필름 및 상기 점착 필름을 사용하여 밀봉된 태양광 전지 셀에 관한 것이다.The present invention relates to a composite adhesive film for a photovoltaic cell based on a mixture of an ethylene-α-olefin copolymer and an ethylene-vinyl acetate copolymer (EVA), and a solar cell sealed using the adhesive film.
금세기 초, 화석 연료를 대신할 재생 가능한 대체 에너지 원으로서, 태양 에너지는 광범위한 관심을 받아왔다. 특히, 최근 환경 보호 목적으로 제조된 태양광 전지 셀 어셈블리는 다양한 분야에서 빠르게 확산되고 있다.At the beginning of this century, as a renewable alternative energy source to replace fossil fuels, solar energy has received widespread attention. In particular, recently manufactured solar cell assembly for environmental protection is rapidly spreading in various fields.
태양광 전지 셀은 통상 유리 기판 표면 투명 보호 부재, 태양광 전지 셀용 표면측 점착 필름, 실리콘 발전 소자와 같은 태양광 전지 셀 단위, 태양광 전지 셀용 후면측 점착 필름 및 후면측 보호 부재를 순차적으로 적층하여 제조된다.The solar cell is usually a glass substrate surface transparent protective member, a surface-side adhesive film for a photovoltaic cell, a solar cell unit such as a silicon power generation element, a rear-side adhesive film for a solar cell, and a rear-side protection member are sequentially laminated. It is manufactured by
태양광 전지 셀을 밀봉하기 위한 점착 필름으로서, 우수한 점착력 및 투명성을 가지는 에틸렌-비닐 아세테이트 공중합체를 주성분으로 포함하고, 유기 퍼옥사이드가 가교제로서 혼합되어 제조된 점착 필름이 일반적으로 사용된다. 발전 효율을 향상시키는 측면에서, 태양광 전지에 입사된 빛을 가능한 효율적으로 태양광 전지 셀 유닛으로 포획하는 것이 강하게 요구된다. 따라서, 밀봉용 EVA 박막은 가능한 높은 투명도를 가지고, 입사된 태양광을 흡수하거나 반사하지 않으며, 모든 태양광을 실질적으로 투과하게 하는 EVA 박막이 요구된다.As an adhesive film for sealing a photovoltaic cell, an adhesive film prepared by including an ethylene-vinyl acetate copolymer having excellent adhesive strength and transparency as a main component, and mixing an organic peroxide as a crosslinking agent is generally used. In terms of improving power generation efficiency, it is strongly required to capture the light incident on the solar cell into the solar cell unit as efficiently as possible. Therefore, an EVA thin film for sealing is required that has as high transparency as possible, does not absorb or reflect incident sunlight, and substantially transmits all sunlight.
종래 기술의 상기 문제점을 고려하여, 본 발명은 부식을 방지하고 황변을 효과적으로 억제하며, 우수한 절연 특성을 갖는 태양광 전지 셀 밀봉용 점착 필름을 제공하는 것을 목적으로 한다. 또한, 본 발명은 본 발명의 상기 점착 필름을 사용하여 발전 효율이 향상시키고 우수한 외관 및 절연 특성을 갖는 태양광 전지 셀을 제공하는 것을 목적으로 한다.In view of the above problems of the prior art, an object of the present invention is to provide an adhesive film for sealing solar cell cells that prevents corrosion, effectively suppresses yellowing, and has excellent insulating properties. In addition, it is an object of the present invention to provide a solar cell cell having an excellent appearance and insulation properties and improved power generation efficiency by using the adhesive film of the present invention.
상기 목적을 달성하기 위하여, 본 발명의 발명자는 집중적인 연구를 수행하였고, EVA 및 에틸렌-α-올레핀 공중합체의 혼합물을 중합체 베이스 물질로 사용하고, 가교제, 특정량의 카르보디이미드 화합물 및 특정 구조를 갖는 광 안정제를 첨가함으로써, 우수한 외관 및 절연 특성을 갖는 태양광 전지 셀을 얻을 수 있고, 산 부식을 방지할 수 있으며, 황변을 효과적으로 억제할 수 있음을 발견하였다.In order to achieve the above object, the inventors of the present invention conducted intensive research, using a mixture of EVA and an ethylene-α-olefin copolymer as a polymer base material, a crosslinking agent, a specific amount of a carbodiimide compound, and a specific structure. It was found that by adding a light stabilizer having a, a solar cell having excellent appearance and insulation properties can be obtained, acid corrosion can be prevented, and yellowing can be effectively suppressed.
구체적으로, 본 발명의 태양광 전지 셀용 복합 점착 필름은 EVA 및 에틸렌-α-올레핀 공중합체의 혼합물, 가교제, 광 안정제 및 카르보디이미드 화합물을 포함한다.Specifically, the composite adhesive film for a solar cell of the present invention includes a mixture of EVA and an ethylene-α-olefin copolymer, a crosslinking agent, a light stabilizer, and a carbodiimide compound.
상기 에틸렌-α-올레핀 공중합체는 EVA 및 에틸렌-α-올레핀 공중합체의 혼합물 100중량부에 대하여 50 내지 90 중량부 포함된다.The ethylene-α-olefin copolymer is contained 50 to 90 parts by weight based on 100 parts by weight of a mixture of EVA and ethylene-α-olefin copolymer.
본 발명에 따른 태양광 전지 셀용 상기 복합 점착 필름은 EVA 공중합체에 특정 함량의 카르보디이미드 화합물을 포함하여, 태양광 전지 셀 내부에서 발생한 산을 충분히 흡수할 수 있고, 전도성 와이어 및 전극의 부식을 방지하면서도 황변을 피할 수 있다. 또한, 특정 구조를 갖는 광 안정제를 결합함으로써, 황변의 발생을 효과적으로 억제하고 장시간 사용하는 경우에 대한 내광성 및 내열성을 향상시킨다.The composite adhesive film for a photovoltaic cell according to the present invention includes a carbodiimide compound of a specific content in the EVA copolymer, and can sufficiently absorb the acid generated inside the photovoltaic cell, and prevents corrosion of conductive wires and electrodes. It can avoid yellowing while preventing. In addition, by combining a light stabilizer having a specific structure, the occurrence of yellowing is effectively suppressed, and light resistance and heat resistance are improved when used for a long time.
이하, 본 발명의 태양광 전지 셀용 점착 필름에 대해 상세히 설명한다.Hereinafter, the adhesive film for a photovoltaic cell of the present invention will be described in detail.
본 발명에서 사용되는 상기 EVA 공중합체는 특별히 제한되지 않고, 당 업계에 공지된 임의의 EVA 공중합체가 사용될 수 있다. 일 실시예로서, 본 발명에서 사용되는 상기 EVA 공중합체는 예를 들면 용매 또는 연쇄 전달제의 존재 또는 부재 하에 100 내지 300℃의 온도에서 라디칼 개시제의 존재 하에 공중합에 의해 제조될 수 있다.The EVA copolymer used in the present invention is not particularly limited, and any EVA copolymer known in the art may be used. As an example, the EVA copolymer used in the present invention may be prepared by copolymerization, for example, in the presence or absence of a solvent or a chain transfer agent at a temperature of 100 to 300° C. in the presence of a radical initiator.
본 발명의 에틸렌-α-올레핀 공중합체는 에틸렌을 C3 내지 C20의 α-올레핀과 공중합하여 얻을 수 있다. C3 내지 C20의 α-올레핀으로서, 프로필렌(propylene), 1-부텐(1-butene), 2-부텐(2-butene), 1-펜텐(1-pentene), 3-메틸-1-부텐(3-methyl-1-butene), 3,3-디메틸-1-부텐(3,3-dimethyl-1-butene), 1-헥센(1-hexene), 4-메틸-1-펜텐(4-methyl-1-pentene), 3-메틸-1-펜텐(3-methyl-1-pentene), 1-옥텐(1-octene), 1-데센(1-decene), 1-도데센(1-dodecene) 등이 일반적으로 사용될 수 있다.The ethylene-α-olefin copolymer of the present invention can be obtained by copolymerizing ethylene with a C3 to C20 α-olefin. As a C3 to C20 α-olefin, propylene, 1-butene, 2-butene, 1-pentene, 3-methyl-1-butene (3 -methyl-1-butene), 3,3-dimethyl-1-butene (3,3-dimethyl-1-butene), 1-hexene (1-hexene), 4-methyl-1-pentene (4-methyl- 1-pentene), 3-methyl-1-pentene, 1-octene, 1-decene, 1-dodecene, etc. This can generally be used.
상기 에틸렌-α-올레핀 공중합체는 당 업계에 공지된 임의의 방법에 의해 제조될 수 있다. 일 실시예로, 촉매로서 지글러(Ziegler) 촉매, 바나듐(vanadium) 화합물, 메탈로센(metallocene) 화합물 등의 존재 하에 공중합된 생성물이 사용될 수 있다.The ethylene-α-olefin copolymer can be prepared by any method known in the art. In one embodiment, as a catalyst, a Ziegler catalyst, a vanadium compound, a metallocene A product copolymerized in the presence of a compound or the like can be used.
EVA 및 에틸렌-α-올레핀 공중합체의 혼합물 100중량부 기준으로, 상기 에틸렌-α-올레핀 공중합체는 50 내지 90 중량부, 바람직하게는 50 내지 88 중량부, 보다 바람직하게는 50 내지 85 중량부, 특히 바람직하게는 70 내지 80중량부 포함될 수 있다.Based on 100 parts by weight of a mixture of EVA and ethylene-α-olefin copolymer, the ethylene-α-olefin copolymer is 50 to 90 parts by weight, preferably 50 to 88 parts by weight, more preferably 50 to 85 parts by weight. It may be included, particularly preferably 70 to 80 parts by weight.
본 발명의 가교제로서 유기 퍼옥사이드계 가교제가 사용될 수 있다.As the crosslinking agent of the present invention, an organic peroxide-based crosslinking agent may be used.
상기 퍼옥사이드계 가교제로서 퍼옥시카보네이트(peroxycarbonate)가 일반적으로 사용될 수 있다.As the peroxide-based crosslinking agent, peroxycarbonate may be generally used.
일 실시예로서, 상기 퍼옥시카보네이트는 2-메틸아밀 메틸퍼옥시카보네이트(2-methylamyl methylperoxycarbonate), 3-메틸아밀 메틸퍼옥시카보네이트(3-methylamyl methylperoxycarbonate), 2-에틸헥실 메틸퍼옥시카보네이트(2-ethylhexyl methylperoxycarbonate), 2-메틸펜틸 에틸퍼옥시카보네이트(2-methylpentyl ethylperoxycarbonate), 3-메틸펜틸 에틸퍼옥시카보네이트(3-methylpentyl ethylperoxycarbonate), 2-에틸헥실 에틸퍼옥시카보네이트(2-ethylhexyl ethylperoxycarbonate), 2-메틸펜틸 프로필퍼옥시카보네이트(2-methylpentyl propylperoxycarbonate), 3-메틸아밀 프로필퍼옥시카보네이트(3-methylamyl propylperoxycarbonate), 2-에틸헥실 프로필퍼옥시카보네이트(2-ethylhexyl propylperoxycarbonate), 2-메틸펜틸 tert-부틸퍼옥시카보네이트(2-methylpentyl tert-butylperoxycarbonate), 3-메틸펜틸 tert-부틸퍼옥시카보네이트(3-methylpentyl tert-butylperoxycarbonate) 및 2-에틸헥실 tert-부틸퍼옥시카보네이트(2-ethylhexyl tert-butylperoxycarbonate)로 이루어진 군에서 선택될 수 있다.In one embodiment, the peroxycarbonate is 2-methylamyl methylperoxycarbonate, 3-methylamyl methylperoxycarbonate, 2-ethylhexyl methylperoxycarbonate (2 -ethylhexyl methylperoxycarbonate), 2-methylpentyl ethylperoxycarbonate, 3-methylpentyl ethylperoxycarbonate, 2-ethylhexyl ethylperoxycarbonate, 2-methylpentyl propylperoxycarbonate, 3-methylamyl propylperoxycarbonate, 2-ethylhexyl propylperoxycarbonate, 2-methylpentyl tert -Butylperoxycarbonate (2-methylpentyl tert-butylperoxycarbonate), 3-methylpentyl tert-butylperoxycarbonate and 2-ethylhexyl tert-butylperoxycarbonate ) May be selected from the group consisting of.
상기 가교제는 EVA 및 에틸렌-α-올레핀 공중합체의 혼합물 100중량부에 대하여, 0.3 내지 1.5 중량부, 바람직하게는 0.35 내지 1.1 중량부, 보다 바람직하게는 0.4 내지 0.55 중량부의 양이 일반적으로 사용될 수 있다.The crosslinking agent may generally be used in an amount of 0.3 to 1.5 parts by weight, preferably 0.35 to 1.1 parts by weight, more preferably 0.4 to 0.55 parts by weight, based on 100 parts by weight of the mixture of EVA and ethylene-α-olefin copolymer. have.
본 발명의 상기 광 안정제는 화학식 1로 표시되는 구조를 갖는 화합물일 수 있다.The light stabilizer of the present invention may be a compound having a structure represented by Chemical Formula 1.
<화학식 1><Formula 1>
식 중 R은 수소 원소를 나타내며, R1, R2, R3 및 R4는 각각 C1 내지 C5의 알킬기를 나타낸다.In the formula, R represents a hydrogen element, and R 1 , R 2 , R 3 and R 4 each represent a C1 to C5 alkyl group.
구체적으로, R1, R2, R3 및 R4는 각각 독립적으로 메틸기, 에틸기, 프로필기 및 부틸기로 이루어진 군에서 선택될 수 있다. R은 메틸기, 에틸기, 프로필기, iso-프로필기, 부틸기, sec-부틸기, tert-부틸기, 펜틸기, 아이소펜틸기, 헥실기, 헵틸기, n-옥틸기, iso-옥틸기, tert-부틸기, 노닐기, iso-노닐기, 데실기, 도데실기, 헥사데실기, 헵타데실기 또는 옥타데실기로 이루어진 군에서 선택될 수 있다.Specifically, R 1 , R 2 , R 3 and R 4 may each independently be selected from the group consisting of a methyl group, an ethyl group, a propyl group, and a butyl group. R is a methyl group, ethyl group, propyl group, iso-propyl group, butyl group, sec-butyl group, tert-butyl group, pentyl group, isopentyl group, hexyl group, heptyl group, n-octyl group, iso-octyl group, It may be selected from the group consisting of a tert-butyl group, a nonyl group, an iso-nonyl group, a decyl group, a dodecyl group, a hexadecyl group, a heptadecyl group, or an octadecyl group.
상기 광 안정제는 EVA 및 에틸렌-α-올레핀 공중합체의 혼합물 100중량부에 대하여 0.2 내지 2.0 중량부, 바람직하게는 0.5 내지 1.5 중량부, 보다 바람직하게는 0.7 내지 1.2 중량부의 함량으로 포함될 수 있다. 상기 광 안정제의 함량이 0.2 중량부 미만이면, 충분한 내광성 및 내열성을 기대하기 어려울 수 있다. 상기 광 안정제의 함량이 0.2 중량부 초과이면, 점착 필름 황변이 발생할 수 있다.The light stabilizer may be included in an amount of 0.2 to 2.0 parts by weight, preferably 0.5 to 1.5 parts by weight, more preferably 0.7 to 1.2 parts by weight, based on 100 parts by weight of the mixture of EVA and ethylene-α-olefin copolymer. If the content of the light stabilizer is less than 0.2 parts by weight, it may be difficult to expect sufficient light resistance and heat resistance. If the content of the light stabilizer exceeds 0.2 parts by weight, yellowing of the adhesive film may occur.
본 발명의 상기 카르보디이민 화합물은 일반적으로 하기 화학식으로 표시되는 구조를 가질 수 있다.The carbodiimine compound of the present invention may have a structure generally represented by the following formula.
<화학식><chemical formula>
R5-N=C=N-(R6-N=C=N-)nR7 R 5 -N=C=N-(R 6 -N=C=N-) n R 7
상기 식 중 R5는 부틸기, R7은 n-옥틸기, R6는 헵틸기이고, n은 500미만인 양의 정수이고, 보다 바람직하게는 1 내지 50의 정수이다.In the above formulas, R 5 is a butyl group, R 7 is an n-octyl group, R 6 is a heptyl group, and n is a positive integer less than 500, and more preferably an integer of 1 to 50.
상기 구조를 갖는 카르보디이미드 화합물을 EVA 공중합체에 배합함으로써, 태양광 전지 셀에서 발생하는 산성 물질을 충분히 흡수할 수 있어, 우수한 내구성을 구현할 수 있다.By blending the carbodiimide compound having the above structure into the EVA copolymer, it is possible to sufficiently absorb acidic substances generated in the solar cell, thereby realizing excellent durability.
상기 카르보디이미드 화합물은 당 업계에 공지된 방법에 의해 제조될 수 있다. 일 실시예로서, 유기인산계 촉매의 존재하여 케톤 용매 중에서 원료로서 디이소시아네이트 화합물을 사용하여 탈탄축합 반응을 통해 제조될 수 있다.The carbodiimide compound can be prepared by a method known in the art. As an example, it may be prepared through a decarburization condensation reaction using a diisocyanate compound as a raw material in a ketone solvent in the presence of an organic phosphoric acid catalyst.
본 발명의 상기 필름은 일반적으로 EVA 및 에틸렌-α-올레핀 공중합체의 상기 혼합물 100중량부에 대하여 0.1 내지 0.35 중량부, 바람직하게는 0.1 내지 0.25 중량부, 보다 바람직하게는 0.15 내지 0.22 중량부의 카르보디이미드 화합물을 포함할 수 있다. 상기 카르보디이미드의 함량이 0.1 중량부 미만인 경우, 상기 생성된 산이 충분히 흡수되지 않아, 전도성 와이어 또는 전극의 부식이 발생할 수 있다. 상기 카르보디이미드의 함량이 0.35 중량부 초과인 경우, 상기 황변이 발생할 수 있다.The film of the present invention is generally 0.1 to 0.35 parts by weight, preferably 0.1 to 0.25 parts by weight, more preferably 0.15 to 0.22 parts by weight based on 100 parts by weight of the mixture of EVA and ethylene-α-olefin copolymer. Bodyimide compounds. When the content of the carbodiimide is less than 0.1 part by weight, the generated acid is not sufficiently absorbed, and corrosion of the conductive wire or electrode may occur. When the content of the carbodiimide is more than 0.35 parts by weight, the yellowing may occur.
본 발명의 태양광 전지 셀용 점착 필름은 일반적으로 사용되는 방법에 의해 제조될 수 있으며, 바람직하게는 캘린더 롤(calender roll), 니더(kneader), 반버리 믹서(Banbury mixer), 압출기(extruduer) 등을 통해 용융-블렌딩(melt-blending)함으로써 제조될 수 있다. 연속 생산을 수행할 수 있는 압출기로 제조하는 것이 특히 바람직하다.The adhesive film for a photovoltaic cell of the present invention may be manufactured by a method generally used, and preferably, a calender roll, a kneader, a Banbury mixer, an extruder, etc. It can be prepared by melt-blending through. It is particularly preferred to manufacture with an extruder capable of carrying out continuous production.
상기 압출 온도 범위는 바람직하게는 110 내지 140℃일 수 있다. 상기 압출 온도가 110℃ 미만인 경우, 태양광 전지 셀 점착 필름의 생산성이 저하될 수 있다. 상기 압출 온도가 140℃를 초과할 경우, 태양광 전지 셀용 복합 점착 필름을 얻기 위해 압출기로 상기 혼합물을 압출하는 과정에서 겔화가 발생할 수 있다.The extrusion temperature range may be preferably 110 to 140 ℃. When the extrusion temperature is less than 110° C., the productivity of the solar cell adhesive film may decrease. When the extrusion temperature exceeds 140° C., gelation may occur in the process of extruding the mixture with an extruder to obtain a composite adhesive film for a solar cell.
본 발명의 태양광 전지 셀용 상기 복합 점착 필름의 제조 방법의 일 실시예로서, 예를 들면, 에틸렌-α-올레핀 공중합체 및 EVA 공중합체는 헨쉘 믹서(Henschel mixer) 또는 회전 드럼 믹서에 의해 상기 첨가제와 혼합될 수 있고, 상기 압출기에 공급되어, 시트형 제품을 형성할 수 있다.As an embodiment of the method for producing the composite adhesive film for a solar cell of the present invention, for example, the ethylene-α-olefin copolymer and the EVA copolymer are used as the additive by a Henschel mixer or a rotary drum mixer. Can be mixed with and fed to the extruder to form a sheet-like product.
본 발명의 태양광 전지 셀용 점착 필름의 두께는 특별히 제한되지 않으나, 바람직하게는 30㎛ 내지 3mm일 수 있다.The thickness of the adhesive film for a photovoltaic cell of the present invention is not particularly limited, but may preferably be 30 μm to 3 mm.
실시예 1Example 1
에틸렌-1-부텐 공중합체(에틸렌 함량: 86몰%, MFR=20g/10min, 밀도:0.870 g/cm3) 75 중량부, EVA(비닐 아세테이트 함량: 26중량%, MFR=4.4 g/10min) 25 중량부, 2-에틸헥실 tert-부틸퍼옥시카보네이트 0.55 중량부, 카르보디이미드 화합물(CARBODILITE V-05, 닛신보 화학(Nisshinbo Chemical Inc.)) 0.2 중량부 및 비스(1,2,2,6,6-펜타메틸-4-피페리딘)세바케이트 (bis(1,2,2,6,6-pentamethyl-4-piperidine)sebacate) 0.1 중량부를 롤 밀에 공급하고, 75℃에서 혼합하여 태양광 전지 셀용 점착 필름 조성물을 제조한다. 상기 점착 필름 조성물을 75℃에서 캘린더링하고, 냉각시켜 점착 필름의 두께가 0.7mm인 태양광 전지 셀용 점착 필름을 얻었다.Ethylene-1-butene copolymer (ethylene content: 86 mol%, MFR=20 g/10min, density: 0.870 g/cm3) 75 parts by weight, EVA (vinyl acetate content: 26% by weight, MFR=4.4 g/10min) 25 Parts by weight, 0.55 parts by weight of 2-ethylhexyl tert-butylperoxycarbonate, 0.2 parts by weight of a carbodiimide compound (CARBODILITE V-05, Nisshinbo Chemical Inc.) and bis(1,2,2,6 ,6-pentamethyl-4-piperidine) sebacate (bis(1,2,2,6,6-pentamethyl-4-piperidine)sebacate) 0.1 part by weight was supplied to a roll mill, mixed at 75° C. An adhesive film composition for photovoltaic cells is prepared. The adhesive film composition was calendered at 75° C. and cooled to obtain an adhesive film for a solar cell having a thickness of 0.7 mm.
실시예 2Example 2
에틸렌-1-옥텐 공중합체(에틸렌 함량: 89몰%, MFR=48g/10min, 밀도:0.884 g/cm3) 81 중량부, EVA(비닐 아세테이트 함량: 26중량%, MFR=4.4 g/10min) 19 중량부, 2-에틸헥실 tert-부틸퍼옥시카보네이트 0.4 중량부, 카르보디이미드 화합물(CARBODILITE V-05, 닛신보 화학(Nisshinbo Chemical Inc.)) 0.13 중량부 및 비스(1,2,2,6,6-펜타메틸-4-피페리딘)세바케이트 (bis(1,2,2,6,6-pentamethyl-4-piperidine)sebacate) 1.7중량부를 롤 밀에 공급하고, 75℃에서 혼합하여 태양광 전지 셀용 점착 필름 조성물을 제조한다. 상기 점착 필름 조성물을 75℃에서 캘린더링하고, 냉각시켜 점착 필름의 두께가 1.1mm인 태양광 전지 셀용 점착 필름을 얻었다.Ethylene-1-octene copolymer (ethylene content: 89 mol%, MFR=48 g/10min, density: 0.884 g/cm3) 81 parts by weight, EVA (vinyl acetate content: 26% by weight, MFR=4.4 g/10min) 19 Parts by weight, 0.4 parts by weight of 2-ethylhexyl tert-butylperoxycarbonate, 0.13 parts by weight of a carbodiimide compound (CARBODILITE V-05, Nisshinbo Chemical Inc.) and bis(1,2,2,6 1.7 parts by weight of,6-pentamethyl-4-piperidine) sebacate (bis(1,2,2,6,6-pentamethyl-4-piperidine)sebacate) was supplied to a roll mill, mixed at 75° C. An adhesive film composition for photovoltaic cells is prepared. The adhesive film composition was calendered at 75° C. and cooled to obtain an adhesive film for a solar cell having a thickness of 1.1 mm.
실시예 3Example 3
에틸렌-1-옥텐 공중합체(에틸렌 함량: 89몰%, MFR=48g/10min, 밀도:0.884 g/cm3) 84 중량부, EVA(비닐 아세테이트 함량: 26중량%, MFR=4.4 g/10min) 16 중량부, 2-에틸헥실 tert-부틸퍼옥시카보네이트 0.51 중량부, 카르보디이미드 화합물(CARBODILITE V-05, 닛신보 화학(Nisshinbo Chemical Inc.)) 0.25 중량부, 비스(1,2,2,6,6-펜타메틸-4-피페리딘)세바케이트 (bis(1,2,2,6,6-pentamethyl-4-piperidine)sebacate) 1.0중량부 및 1-메틸-8-(1,2,2,6,6-펜타메틸-4-피페리딘) 세바케이트((1-methyl-8-(1,2,2,6,6-pentamethyl-4-piperidine) sebacate) 1.0 중량부를 롤 밀에 공급하고, 75℃에서 혼합하여 태양광 전지 셀용 점착 필름 조성물을 제조한다. 상기 점착 필름 조성물을 75℃에서 캘린더링하고, 냉각시켜 점착 필름의 두께가 2.0mm인 태양광 전지 셀용 점착 필름을 얻었다.Ethylene-1-octene copolymer (ethylene content: 89 mol%, MFR=48g/10min, density: 0.884 g/cm3) 84 parts by weight, EVA (vinyl acetate content: 26% by weight, MFR=4.4 g/10min) 16 Parts by weight, 0.51 parts by weight of 2-ethylhexyl tert-butylperoxycarbonate, 0.25 parts by weight of a carbodiimide compound (CARBODILITE V-05, Nisshinbo Chemical Inc.), bis(1,2,2,6 ,6-pentamethyl-4-piperidine) sebacate (bis(1,2,2,6,6-pentamethyl-4-piperidine)sebacate) 1.0 part by weight and 1-methyl-8-(1,2, 2,6,6-pentamethyl-4-piperidine) sebacate ((1-methyl-8-(1,2,2,6,6-pentamethyl-4-piperidine) sebacate) 1.0 part by weight in a roll mill It was supplied and mixed at 75° C. to prepare an adhesive film composition for photovoltaic cells, and the adhesive film composition was calendered at 75° C. and cooled to obtain an adhesive film for a photovoltaic cell having a thickness of 2.0 mm.
비교예 1Comparative Example 1
EVA 공중합체 100중량부를 베이스 물질로 사용하였으며, 에틸렌-1-부틸 공중합체를 사용하지 않은 점을 제외하고, 실시예 1과 동일한 방식으로 태양광 전지 셀용 점착 필름 조성물을 제조하였다. 상기 얻어진 점착 필름 조성물을 75℃에서 캘린더링하고, 냉각시켜 점착 필름의 두께가 2.6mm인 태양광 전지 셀용 점착 필름을 얻었다.An adhesive film composition for a photovoltaic cell was prepared in the same manner as in Example 1, except that 100 parts by weight of the EVA copolymer was used as the base material, and the ethylene-1-butyl copolymer was not used. The obtained adhesive film composition was calendered at 75° C. and cooled to obtain an adhesive film for a solar cell having a thickness of 2.6 mm.
비교예 2Comparative Example 2
비스(1,2,2,6,6-펜타메틸-4-피페리딘)세바케이트 (bis(1,2,2,6,6-pentamethyl-4-piperidine)sebacate)를 사용하지 않은 점을 제외하고, 실시예 1과 동일한 방식으로 태양광 전지 셀용 점착 필름 조성물을 제조하였다. 상기 얻어진 점착 필름 조성물을 75℃에서 캘린더링하고, 냉각시켜 점착 필름의 두께가 1.5mm인 태양광 전지 셀용 점착 필름을 얻었다.Bis(1,2,2,6,6-pentamethyl-4-piperidine) sebacate (bis(1,2,2,6,6-pentamethyl-4-piperidine) sebacate) was not used. Except, the adhesive film composition for a photovoltaic cell was prepared in the same manner as in Example 1. The obtained adhesive film composition was calendered at 75°C and cooled to obtain an adhesive film for a solar cell having a thickness of 1.5 mm.
비교예 3Comparative Example 3
카르보디이미드 화합물을 사용하지 않은 점을 제외하고, 실시예 1과 동일한 방식으로 태양광 전지 셀용 점착 필름 조성물을 제조하였다. 상기 얻어진 점착 필름 조성물을 75℃에서 캘린더링하고, 냉각시켜 점착 필름의 두께가 1.9mm인 태양광 전지 셀용 점착 필름을 얻었다.An adhesive film composition for a solar cell was prepared in the same manner as in Example 1, except that the carbodiimide compound was not used. The obtained adhesive film composition was calendered at 75° C. and cooled to obtain an adhesive film for a solar cell having a thickness of 1.9 mm.
평가 방법Assessment Methods
1. 파단 시간:1. Breaking time:
상기 얻어진 EVA 박막을 태양광 노화 시험기(블랙보드 온도: 63℃, 수분 미스트 없음)로 열화시키며, 파단 시간(파단에 필요한 시간)을 120시간 마다 1회 측정하였다.The obtained EVA thin film was deteriorated with a solar aging tester (black board temperature: 63° C., no moisture mist), and the breaking time (time required for breaking) was measured once every 120 hours.
2. PID 평가:2. PID evaluation:
상기 얻어진 태양광 전지 셀용 점착 필름을 표면 점착 필름 및 후면 점착 필름으로 사용하고, 표면 투명 보호 부재(유리판) 및 후면 보호 부재(PET 필름) 사이에 끼워진 태양광 전지 셀 단위에 열과 압력을 가하여, 네 개의 태양광 전지셀 단위가 연결된 태양광 전지 셀 마이크로 조립체를 제조하였다. PID 현상 발생에 대한 모델 테스트를 위하여, 상기 제조된 태양광 전지셀 마이크로 조립체 각각을 수광측을 아래로하여 물 탱크 안으로 침지시키고, 단락된 모듈의 출력 단자를 음(-) 전극에 연결하고, 양(+) 전극은 온도 85℃ 및 상대 흡도 85%인 물 탱크 안에 있는 구리판에 연결하고, 24시간 동안 1,500V의 전압을 인가하였다.The obtained adhesive film for photovoltaic cells was used as a surface adhesive film and a rear adhesive film, and heat and pressure were applied to the solar cell unit sandwiched between the surface transparent protective member (glass plate) and the rear protective member (PET film). A photovoltaic cell micro-assembly to which two photovoltaic cell units are connected was manufactured. For the model test for the occurrence of the PID phenomenon, each of the manufactured photovoltaic cell micro-assemblies was immersed into a water tank with the light receiving side down, and the output terminal of the shorted module was connected to the negative (-) electrode, The (+) electrode was connected to a copper plate in a water tank having a temperature of 85° C. and a relative absorbance of 85%, and a voltage of 1,500 V was applied for 24 hours.
상기 시험 전후에, 각 태양광 전지 셀 마이크로 조립체의 최대 출력을 측정하여, 출력 유지율((시험 후 Pmax / 시험 전 Pmax) X 100(%))을 계산하였다. 태양광 전지셀 마이크로 조립체의 출력 유지율이 95% 이상인 경우 ◎로 평가하고, 태양광 전지셀 마이크로 조립체의 출력 유지율이 90% 이상 95% 미만인 경우 ○로 평가하고, 태양광 전지셀 마이크로 조립체의 출력 유지율이 85% 이상 90% 미만인 경우 △로 평가하였다.Before and after the test, the maximum output of each photovoltaic cell micro-assembly was measured, and the output retention rate ((Pmax after test / Pmax before test) X 100 (%)) was calculated. If the output retention rate of the solar cell micro-assembly is 95% or more, evaluate it as ◎, and if the output retention rate of the solar cell micro-assembly is 90% or more and less than 95%, evaluate it as ○, and In the case of 85% or more and less than 90%, it was evaluated as △.
3. 황변3. Yellowing
상기 얻어지 태양광 전지셀용 점착 필름을 2개의 유리(두께 3.0mm) 사이에 끼우고, 진공 라미네이터를 사용하여 100℃에서 10분동안 일시적으로 크림핑하고, 오븐에 넣은 후 150℃에서 30분 동안 가열하여 가교시킴으로써 적층체를 얻었다.The obtained adhesive film for solar cell cells was sandwiched between two glasses (thickness 3.0 mm), crimped temporarily at 100° C. for 10 minutes using a vacuum laminator, and placed in an oven at 150° C. for 30 minutes. The laminate was obtained by heating and crosslinking.
상기 적층체에 150시간 동안 자외선을 조사한 후 색차계를 사용하여 황색도를 측정하였다. 상기 자외선 조사는 온도 63℃의 환경에서 100mW/cm2의 강도로 295 내지 400nm의 자외선을 조사하는 s-UV 조사 시험기를 사용하여 수행하였다. 황색도가 4.0 미만인 경우 ○로 평가되었고, 황색도가 4.0 이상인 경우 ×로 평가되었다.After irradiating the laminate with ultraviolet rays for 150 hours, the yellowness was measured using a color difference meter. The ultraviolet irradiation was performed using an s-UV irradiation tester irradiating ultraviolet rays of 295 to 400 nm at an intensity of 100 mW/cm 2 in an environment at a temperature of 63° C. If the yellowness was less than 4.0, it was evaluated as ○, and if the yellowness was more than 4.0, it was evaluated as ×.
결과는 하기 표 1에 나타내었다:The results are shown in Table 1 below:
표 1에서 알 수 있는 바와 같이, 본 발명의 태양광 전지 셀용 상기 점착 필름은 파단 시간, PID 성능 및 황변 저항성 측면에서 더 우수한 효과를 구현하였다.As can be seen from Table 1, the adhesive film for a photovoltaic cell of the present invention has implemented more excellent effects in terms of breaking time, PID performance, and yellowing resistance.
Claims (6)
가교제;
광 안정제; 및
카르보디이미드 화합물을 포함하며,
상기 에틸렌-α-올레핀 공중합체는 EVA 및 에틸렌-α-올레핀 공중합체의 상기 혼합물 100중량부에 대하여 50 내지 90중량부 포함되고,
상기 카르보디이미드 화합물은 하기 화학식으로 표시되는 구조를 갖는, 태양광 전지 셀용 복합 점착 필름.
<화학식>
R5-N=C=N-(R6-N=C=N-)nR7
(상기 식 중 R5는 부틸기, R7은 n-옥틸기, R6는 헵틸기이고, n은 500미만인 양의 정수임)
Mixtures of EVA and ethylene-α-olefin copolymers;
Crosslinking agent;
Light stabilizers; And
It includes a carbodiimide compound,
The ethylene-α-olefin copolymer is contained 50 to 90 parts by weight based on 100 parts by weight of the mixture of EVA and ethylene-α-olefin copolymer,
The carbodiimide compound has a structure represented by the following formula, a composite adhesive film for a photovoltaic cell.
<chemical formula>
R 5 -N=C=N-(R 6 -N=C=N-)nR 7
(In the above formula, R 5 is a butyl group, R 7 is an n-octyl group, R 6 is a heptyl group, and n is a positive integer less than 500)
The composite adhesive film of claim 1, wherein the crosslinking agent is contained in an amount of 0.3 to 1.5 parts by weight based on 100 parts by weight of the mixture of EVA and ethylene-α-olefin copolymer.
The composite adhesive film of claim 1, wherein the light stabilizer is contained in an amount of 0.2 to 2.0 parts by weight based on 100 parts by weight of the mixture of EVA and ethylene-α-olefin copolymer.
The composite adhesive film according to claim 1, wherein the carbodiimide compound is contained in an amount of 0.1 to 0.25 parts by weight based on 100 parts by weight of the mixture of EVA and ethylene-α-olefin copolymer.
The composite adhesive film according to claim 1, wherein the crosslinking agent is a peroxycarbonate-based crosslinking agent.
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