JP2014209626A5 - - Google Patents
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- JP2014209626A5 JP2014209626A5 JP2014095317A JP2014095317A JP2014209626A5 JP 2014209626 A5 JP2014209626 A5 JP 2014209626A5 JP 2014095317 A JP2014095317 A JP 2014095317A JP 2014095317 A JP2014095317 A JP 2014095317A JP 2014209626 A5 JP2014209626 A5 JP 2014209626A5
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- solar cell
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- cell sealing
- crosslinking
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- 238000007789 sealing Methods 0.000 claims description 38
- 239000000463 material Substances 0.000 claims description 34
- 238000006243 chemical reaction Methods 0.000 claims description 21
- 239000010419 fine particle Substances 0.000 claims description 14
- 229920005989 resin Polymers 0.000 claims description 14
- 239000011347 resin Substances 0.000 claims description 14
- 239000004925 Acrylic resin Substances 0.000 claims description 8
- 229920000178 Acrylic resin Polymers 0.000 claims description 8
- 229910052693 Europium Inorganic materials 0.000 claims description 8
- OGPBJKLSAFTDLK-UHFFFAOYSA-N europium Chemical group [Eu] OGPBJKLSAFTDLK-UHFFFAOYSA-N 0.000 claims description 8
- 238000003260 fluorescence intensity Methods 0.000 claims description 8
- 150000001336 alkenes Chemical class 0.000 claims description 4
- 229920001577 copolymer Polymers 0.000 claims description 4
- 125000004435 hydrogen atoms Chemical group [H]* 0.000 claims description 3
- 230000000875 corresponding Effects 0.000 claims description 2
- 230000005284 excitation Effects 0.000 claims description 2
- 238000002189 fluorescence spectrum Methods 0.000 claims description 2
- CERQOIWHTDAKMF-UHFFFAOYSA-M methacrylate Chemical compound CC(=C)C([O-])=O CERQOIWHTDAKMF-UHFFFAOYSA-M 0.000 claims description 2
- 238000004132 cross linking Methods 0.000 claims 6
- 239000006087 Silane Coupling Agent Substances 0.000 claims 3
- 239000003431 cross linking reagent Substances 0.000 claims 3
- 239000005038 ethylene vinyl acetate Substances 0.000 claims 3
- 229920005680 ethylene-methyl methacrylate copolymer Polymers 0.000 claims 3
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 claims 3
- KOMNUTZXSVSERR-UHFFFAOYSA-N 1,3,5-tris(prop-2-enyl)-1,3,5-triazinane-2,4,6-trione Chemical compound C=CCN1C(=O)N(CC=C)C(=O)N(CC=C)C1=O KOMNUTZXSVSERR-UHFFFAOYSA-N 0.000 claims 1
- DMWVYCCGCQPJEA-UHFFFAOYSA-N 2,5-bis(tert-butylperoxy)-2,5-dimethylhexane Chemical group CC(C)(C)OOC(C)(C)CCC(C)(C)OOC(C)(C)C DMWVYCCGCQPJEA-UHFFFAOYSA-N 0.000 claims 1
- VVQNEPGJFQJSBK-UHFFFAOYSA-N 2-methyl-2-propenoic acid methyl ester Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 claims 1
- XDLMVUHYZWKMMD-UHFFFAOYSA-N 3-trimethoxysilylpropyl 2-methylprop-2-enoate Chemical group CO[Si](OC)(OC)CCCOC(=O)C(C)=C XDLMVUHYZWKMMD-UHFFFAOYSA-N 0.000 claims 1
- JXCAHDJDIAQCJO-UHFFFAOYSA-M CCCCC(CC)C(OC([O-])=O)OOC(C)(C)C Chemical compound CCCCC(CC)C(OC([O-])=O)OOC(C)(C)C JXCAHDJDIAQCJO-UHFFFAOYSA-M 0.000 claims 1
- 229920000089 Cyclic olefin copolymer Polymers 0.000 claims 1
- 239000005977 Ethylene Substances 0.000 claims 1
- 239000003054 catalyst Substances 0.000 claims 1
- 239000008393 encapsulating agent Substances 0.000 claims 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 claims 1
- 229920000092 linear low density polyethylene Polymers 0.000 claims 1
- 239000004707 linear low-density polyethylene Substances 0.000 claims 1
- 229920000642 polymer Polymers 0.000 claims 1
- 239000000126 substance Substances 0.000 claims 1
- 238000002834 transmittance Methods 0.000 claims 1
- XTXRWKRVRITETP-UHFFFAOYSA-N vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 claims 1
- 239000004711 α-olefin Substances 0.000 claims 1
- 238000010248 power generation Methods 0.000 description 11
- 230000000694 effects Effects 0.000 description 9
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 150000000918 Europium Chemical class 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 125000004432 carbon atoms Chemical group C* 0.000 description 1
- 125000001183 hydrocarbyl group Chemical group 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 230000001681 protective Effects 0.000 description 1
- 238000004383 yellowing Methods 0.000 description 1
Description
［式中、Ｒは、それぞれ独立して水素原子又は任意に置換されていても良い炭素原子数１〜２０の炭化水素基を表し、ｎは、１〜４の整数である。］で表されるユウロピウム錯体であり、前記波長変換材料が、アクリル系樹脂からなる微粒子中に含有されているか、又は当該微粒子に担持されており、且つ前記微粒子が、前記樹脂材料中に分散されていることを特徴とする太陽電池用封止膜によって達成される。
[Wherein, R independently represents a hydrogen atom or an optionally substituted hydrocarbon group having 1 to 20 carbon atoms, and n is an integer of 1 to 4. The wavelength conversion material is contained in or supported by fine particles made of an acrylic resin, and the fine particles are dispersed in the resin material. It is achieved by a sealing film for solar cells characterized by
数多くの波長変換材料が検討された結果、前記ユウロピウム錯体の波長変換材料は、太陽電池用封止膜中において紫外線による劣化が極めて生じ難いことが判った。従って、前記波長変換材料を用いることで、屋外で長期間使用した場合であっても、太陽電池の発電効率を向上する効果が低下し難い太陽電池用封止膜とすることができる。更に、前記波長変換材料が、アクリル系樹脂からなる微粒子中に含有されており、その微粒子が封止膜の樹脂材料中に分散されていることにより、前記波長変換材料が太陽電池用封止膜中に均一に分散し、発電効率を向上する効果を十分に発揮することができ、前記波長変換材料の凝集等による劣化を防止し、更に太陽電池の発電効率を向上する効果が低下し難い太陽電池用封止膜とすることができる。前記波長変換材料が、前記微粒子中に含有されていることによりオレフィン（共）重合体を含む太陽電池用封止膜中に生じる場合がある酸や水分の影響による前記波長変換材料の劣化をより防止することができ、より発電効率を向上する効果が低下し難い太陽電池用封止膜とすることができる。また、前記波長変換材料の含有量が、前記樹脂材料１００質量部に対して、０．０００５〜０．００１質量部であり、且つ前記微粒子における前記波長変換材料の含有率が、０．１〜１質量％であることにより、更に十分な発電効率を向上する効果が得られ、透明性に影響を与える場合が低い。
As a result of studying a large number of wavelength conversion materials, it has been found that the europium complex wavelength conversion material is extremely unlikely to be deteriorated by ultraviolet rays in the solar cell sealing film. Therefore, by using the wavelength conversion material, it is possible to obtain a solar cell sealing film in which the effect of improving the power generation efficiency of the solar cell is unlikely to deteriorate even when used outdoors for a long period of time. Furthermore, the wavelength conversion material is contained in fine particles made of an acrylic resin, and the fine particles are dispersed in the resin material of the sealing film, whereby the wavelength conversion material is sealed in a solar cell sealing film. It is possible to sufficiently disperse in the solar cell and sufficiently exhibit the effect of improving the power generation efficiency, prevent deterioration due to aggregation of the wavelength conversion material, etc., and further reduce the effect of improving the power generation efficiency of the solar cell. It can be set as the sealing film for batteries. When the wavelength conversion material is contained in the fine particles, the wavelength conversion material may be further deteriorated due to the influence of acid or moisture that may occur in a sealing film for solar cells containing an olefin (co) polymer. The sealing film for solar cells can be prevented and the effect of improving the power generation efficiency is less likely to decrease. Further, the content of the wavelength conversion material is 0.0005 to 0.001 parts by mass with respect to 100 parts by mass of the resin material, and the content of the wavelength conversion material in the fine particles is 0.1 to By being 1% by mass, an effect of further improving the power generation efficiency is obtained, and the case of affecting the transparency is low.
（１）前記アクリル系樹脂が、ポリ（メタ）アクリル酸メチルを主成分とする樹脂である。屈折率がオレフィン（共）重合体と同等又はそれ以下であるため、封止膜の透明性に影響を与え難い。
（２）前記微粒子が、球状である。ハンドリング性、分散性に優れる。
（３）前記波長変換材料の励起波長に相当する３２５ｎｍの光線を、太陽電池用封止膜に照射したときに得られる蛍光発光スペクトルにおける波長５８０〜６４０ｎｍの発光ピーク面積を蛍光強度とし、１０００Ｗ／ｃｍ２の照射強度を有する紫外線ランプから２３５ｍｍの距離に、前記太陽電池用封止膜を配置し、温度６３℃条件下で連続照射し、経時的に前記蛍光強度を測定したとき、前記太陽電池用封止膜の蛍光強度が、照射前の蛍光強度に対して３０％に低下するまでに要する時間が、１０時間以上である。
( 1 ) The acrylic resin is a resin mainly composed of poly (meth) methyl acrylate. Since the refractive index is equal to or less than that of the olefin (co) polymer, it is difficult to affect the transparency of the sealing film.
( 2 ) The fine particles are spherical. Excellent handling and dispersibility .
(3 ) An emission peak area at a wavelength of 580 to 640 nm in a fluorescence emission spectrum obtained when a solar cell sealing film is irradiated with a light beam of 325 nm corresponding to the excitation wavelength of the wavelength conversion material is defined as 1000 W / When the solar cell sealing film is disposed at a distance of 235 mm from an ultraviolet lamp having an irradiation intensity of cm 2, the irradiation is continuously performed at a temperature of 63 ° C., and the fluorescence intensity is measured over time. The time required for the fluorescence intensity of the sealing film to decrease to 30% of the fluorescence intensity before irradiation is 10 hours or more.
本発明の太陽電池封止膜は、発電効率を向上する効果を有する波長変換材料として特定のユウロピウム錯体が、封止膜を形成する樹脂材料中に分散されたアクリル系樹脂からなる微粒子中に含有されているので、紫外線等の影響により波長変換材料が劣化され難く、発電効率を向上する効果が長期間維持されている。従って、本発明の太陽電池は、高い発電効率が長期に亘り維持される太陽電池であるといえる。
The solar cell sealing film of the present invention contains a specific europium complex as a wavelength conversion material having an effect of improving power generation efficiency in fine particles made of an acrylic resin dispersed in a resin material forming the sealing film. than that is, the wavelength converting material due to the influence of ultraviolet rays or the like hardly is degraded, the effect of improving the power generation efficiency is maintained for a long period of time. Therefore, it can be said that the solar cell of the present invention is a solar cell in which high power generation efficiency is maintained for a long time.
［式中、Ｒは水素原子を表し、ｎは１である。］で表されるユウロピウム錯体を含む。そして、このユウロピウム錯体が樹脂材料中に分散されたアクリル系樹脂からなる微粒子中に含有されている。
[Wherein R represents a hydrogen atom and n is 1 . The europium complex represented by this is included. The europium complex is contained in fine particles made of an acrylic resin dispersed in a resin material .
なお、３６０ｎｍ付近に吸収ピークを有する他の波長変換材料と比較して、式（Ｉ）のユウロピウム錯体は３３０ｎｍ付近に吸収ピークを有する。そのため、発電への寄与率がより低い波長の紫外線を可視光に変換可能であり、発電効率の向上により有効な効果を発揮する。また、太陽電池の裏面側保護部材や、製造時に太陽電池セルを所望の位置に配置するためのセル止めテープに使用されることが多いポリエステル（特にＰＥＴ）材料は３３０ｎｍの紫外線により特に劣化する傾向にあるため、式（Ｉ）のユウロピウム錯体を使用すれば、裏面側保護部材やセル止め用テープの劣化や黄変を軽減することができる。
そして、本発明においては、式（Ｉ）のユウロピウム錯体が、更にアクリル系樹脂からなる微粒子に含有されていることにより、波長変換材料が太陽電池用封止膜中に均一に分散されている。
Note that the europium complex of the formula (I) has an absorption peak near 330 nm as compared with other wavelength conversion materials having an absorption peak near 360 nm. Therefore, it is possible to convert ultraviolet light having a lower contribution rate to power generation into visible light, and exhibit an effective effect by improving power generation efficiency. In addition, polyester (particularly PET) materials often used for solar cell back surface protection members and cell stopper tapes for placing solar cells at desired positions during manufacturing tend to be particularly deteriorated by UV rays of 330 nm. Therefore, if the europium complex of the formula (I) is used, it is possible to reduce deterioration and yellowing of the back surface side protective member and the cell stopper tape.
Then, in the present invention, europium complexes of formula (I), further by a Turkey are contained in fine particles of acrylic resin, the wavelength conversion material is uniformly dispersed in the sealing film for a solar cell .
式（Ｉ）のユウロピウム錯体は、太陽電池用封止膜の樹脂材料１００質量部に対して０．０００５〜０．００１質量部の範囲内で配合される。通常、０．０００００１質量部を下回ると、十分な波長変換効果が得られない恐れがあり、更に０．００００１質量部以上配合することが好ましく、特に０．０００１質量部以上配合することが好ましい。一方、１質量部を上回ると、太陽光を発電素子に十分に入射させるために必要な透明性を確保し難くなる恐れがあり、またコスト的にも不利になる傾向があり、更に０．１質量部以下配合することが好ましく、特に０．０１質量部以下配合することが好ましい。
Europium complex of formula (I), Ru is blended in the range of 0.0005 to 0.001 parts by weight with respect to the resin material 100 parts by weight of the sealing film for a solar cell. Usually, when the amount is less than 0.000001 part by mass, a sufficient wavelength conversion effect may not be obtained, and it is preferable to add 0.00001 part by mass or more, and particularly preferably 0.0001 part by mass or more. On the other hand, if it exceeds 1 part by mass, it may be difficult to ensure the transparency required to allow sunlight to be sufficiently incident on the power generation element, and there is a tendency that it is disadvantageous in terms of cost. It is preferable to mix | blend below mass part, and it is preferable to mix | blend below 0.01 mass part especially.
Claims (14)
波長変換物質を含む太陽電池用封止膜であって、
波長変換材料が、下記式（Ｉ）：
で表されるユウロピウム錯体であり、
前記波長変換材料が、アクリル系樹脂からなる微粒子中に含有されており、
前記微粒子が、前記樹脂材料中に分散されており、
前記波長変換材料の含有量が、前記樹脂材料１００質量部に対して、０．０００５〜０．００１質量部であり、且つ
前記微粒子における前記波長変換材料の含有率が、０．１〜１質量％であり、
前記オレフィン（共）重合体は、エチレン−酢酸ビニル共重合体（ＥＶＡ）、エチレン−メタクリル酸メチル共重合体（ＥＭＭＡ）及びメタロセン触媒を用いて重合されたエチレン・α−オレフィン共重合体（ｍ−ＬＬＤＰＥ）からなる群から選択される少なくとも１種の重合体であり、
さらに、架橋剤、架橋助剤及びシランカップリング剤を含み、
前記架橋剤の含有量が、前記樹脂材料１００質量部に対して、０．２〜３質量部であり、
前記架橋助剤の含有量が、前記樹脂材料１００質量部に対して、０．１〜２．５質量部であり、
前記シランカップリング剤の含有量が、前記樹脂材料１００質量部に対して、０．１〜０．７質量部であることを特徴とする太陽電池用封止膜。 A resin material containing an olefin (co) polymer, and a solar cell sealing film containing a wavelength converting substance,
The wavelength conversion material has the following formula (I):
It is a europium complex represented by
The wavelength conversion material is contained in fine particles made of an acrylic resin ,
The fine particles are dispersed in the resin material ;
The content of the wavelength conversion material is 0.0005 to 0.001 parts by mass with respect to 100 parts by mass of the resin material, and
The content of the wavelength conversion material in the fine particles is 0.1 to 1% by mass,
The olefin (co) polymer is an ethylene / α-olefin copolymer (m) polymerized using an ethylene-vinyl acetate copolymer (EVA), an ethylene-methyl methacrylate copolymer (EMMA), and a metallocene catalyst. -LLDPE) at least one polymer selected from the group consisting of
Furthermore, a crosslinking agent, a crosslinking assistant and a silane coupling agent are included,
The content of the crosslinking agent is 0.2 to 3 parts by mass with respect to 100 parts by mass of the resin material,
The content of the crosslinking aid is 0.1 to 2.5 parts by mass with respect to 100 parts by mass of the resin material,
Content of the said silane coupling agent is 0.1-0.7 mass part with respect to 100 mass parts of said resin materials , The sealing film for solar cells characterized by the above-mentioned .
１０００Ｗ／ｃｍ２の照射強度を有する紫外線ランプから２３５ｍｍの距離に、前記太陽電池用封止膜を配置し、温度６３℃条件下で連続照射し、経時的に前記蛍光強度を測定したとき、前記太陽電池用封止膜の蛍光強度が、照射前の蛍光強度に対して３０％に低下するまでに要する時間が、１０時間以上である請求項１〜８のいずれか１項に記載の太陽電池用封止膜。 The fluorescence intensity is the emission peak area at a wavelength of 580 to 640 nm in the fluorescence emission spectrum obtained when the solar cell sealing film is irradiated with a light beam of 325 nm corresponding to the excitation wavelength of the wavelength conversion material,
When the solar cell sealing film is disposed at a distance of 235 mm from an ultraviolet lamp having an irradiation intensity of 1000 W / cm 2 , continuously irradiated at a temperature of 63 ° C., and the fluorescence intensity is measured over time, The solar cell according to any one of claims 1 to 8, wherein the time required for the fluorescence intensity of the solar cell sealing film to decrease to 30% of the fluorescence intensity before irradiation is 10 hours or more. Sealing film.
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| KR101737685B1 (en) | 2015-04-08 | 2017-05-18 | 주식회사 엘지화학 | Back sheet for photovoltaic modules |
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| JP3473605B2 (en) * | 2000-02-18 | 2003-12-08 | 株式会社ブリヂストン | Solar cell manufacturing method |
| JP3668966B2 (en) * | 2001-09-07 | 2005-07-06 | 関西ティー・エル・オー株式会社 | Rare earth complex, optical functional material and light emitting device using the same |
| JP2006251589A (en) * | 2005-03-14 | 2006-09-21 | Nitto Denko Corp | Optical element, polarized plane light source using element, and display apparatus using light source |
| JP4791743B2 (en) * | 2005-03-25 | 2011-10-12 | 国立大学法人大阪大学 | Dye-sensitized solar cell |
| JP2008091772A (en) * | 2006-10-04 | 2008-04-17 | Bridgestone Corp | Sealing film for solar battery and solar battery using the same |
| JP2010039161A (en) * | 2008-08-05 | 2010-02-18 | Seiko Epson Corp | Ink for color filter, color filter set, color filter, image display, and electronic equipment |
| JP2011210891A (en) * | 2010-03-29 | 2011-10-20 | Hitachi Chem Co Ltd | Wavelength-converting solar cell sealing sheet, and solar cell module |
| JP5716319B2 (en) * | 2010-08-20 | 2015-05-13 | 日立化成株式会社 | Spherical phosphor for wavelength conversion type solar cell, wavelength conversion type solar cell encapsulant, solar cell module, and production method thereof |
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