KR101070670B1 - Adhesive sheet composition for solar battery, adhesive sheet and solar battery using the same - Google Patents
Adhesive sheet composition for solar battery, adhesive sheet and solar battery using the same Download PDFInfo
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- KR101070670B1 KR101070670B1 KR1020090057145A KR20090057145A KR101070670B1 KR 101070670 B1 KR101070670 B1 KR 101070670B1 KR 1020090057145 A KR1020090057145 A KR 1020090057145A KR 20090057145 A KR20090057145 A KR 20090057145A KR 101070670 B1 KR101070670 B1 KR 101070670B1
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- 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
Abstract
The present invention relates to a solar cell adhesive sheet composition, a solar cell adhesive sheet and a solar cell using the same.
The adhesive sheet composition for a solar cell according to the present invention comprises an ethylene copolymer resin, an organic peroxide and an organic or inorganic nucleating agent.
The adhesive sheet composition for a solar cell having the composition may obtain a solar cell adhesive sheet having improved mechanical properties by improving the transmittance and increasing the crystallization rate of the polymer by miniaturizing the size of the crystal upon crystallization of the polymer, wherein the adhesive sheet for the solar cell is solar It can be usefully applied to the battery.
Solar cell, adhesive sheet, nuclear agent
Description
The present invention relates to a solar cell adhesive sheet composition, a solar cell adhesive sheet and a solar cell using the same.
As environmental problems increase in recent years, hydro power, wind power, and solar power have come into the spotlight as clean energy. Among them, solar power generation using solar energy is growing in recent years as an energy source that is clean and useful for preventing global warming. As a representative of this photovoltaic power generation, a solar cell using semiconductors such as monocrystalline silicon, polycrystalline silicon, amorphous silicon and the like can be given. The solar cell is a practical use of the principle that emits a current when sunlight is irradiated to the semiconductor.
In addition, a solar cell is generally manufactured by protecting a solar cell device such as silicon, gallium arsenide, copper-indium selenium with an upper transparent protective material and a lower substrate protective material, and fixing the solar cell device and the protective material with an adhesive.
However, although the power generation efficiency of the solar cell manufactured as described above is measured to be about 13 to 16%, there is a problem that the power generation efficiency must be increased in order to commercialize, and the transmittance of the adhesive sheet must be improved to increase the power generation efficiency.
It is an object of the present invention to improve the power generation efficiency by minimizing the size of crystals in the crystallization of polymers in the manufacture of adhesive sheets to improve the transmittance and the crystallization rate of the polymers to improve mechanical properties such as tensile strength. It is to provide a solar cell adhesive sheet composition.
Another object of the present invention is to provide a solar cell adhesive sheet having improved transmittance as manufactured using the solar cell adhesive sheet composition.
Still another object of the present invention is to provide a solar cell including the solar cell adhesive sheet.
In order to achieve the above object of the present invention, the present invention is a solar cell adhesive sheet composition comprising an ethylene copolymer resin and an organic peroxide, the solar cell adhesive sheet composition comprises an organic or inorganic nucleating agent, the organic or The inorganic nucleating agent provides an adhesive sheet composition for a solar cell, which is added in an amount of 0.1 to 0.5 parts by weight based on 100 parts by weight of the ethylene copolymer resin.
The organic nucleating agent is composed of 1,3-2,4-dibenzylidene sorbitol, 1,3-2,4-diparamethylbenzylidene sorbitol, crosslinked polystyrene particles, crosslinked polymethacrylate acrylate particles and crosslinked silicone resin particles And at least one selected from the group consisting of at least one selected from the group consisting of glass beads, talc, mica, quartz, feldspar, bentonite, kaolincre, jade, silica, calcite, TiO 2 and fiberglass. It may include.
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The organic peroxide may include at least one selected from a dialkyl peroxide type, an alkyl peroxy ester type or a peroxy ketone type. The organic peroxide may be at least one selected from the alkyl peroxy ester type. In addition, the organic peroxide may be a mixture of at least one selected from the dialkyl peroxide type, and at least one selected from the alkyl peroxy ester type and the peroxy ketone type.
The organic peroxide may be added 0.2 to 4 parts by weight based on 100 parts by weight of the ethylene copolymer resin.
In order to achieve another object of the present invention, the present invention provides a solar cell adhesive sheet characterized in that it is prepared using the above-described solar cell adhesive sheet composition.
For still another object of the present invention, the present invention includes a solar cell device, an upper protective material disposed on the upper portion of the solar cell element and a lower protective material disposed on the lower portion of the solar cell element, and between the solar cell element and the upper and lower protective materials. It provides a solar cell, characterized in that at least one solar cell adhesive sheet according to the present invention is formed.
The adhesive sheet composition for a solar cell according to the present invention includes an organic or inorganic nucleating agent to promote crystal formation and enhance physical properties in the ethylene copolymer resin, thereby improving physical and optical properties of the amorphous part by the crystalline part. That is, the adhesive sheet composition for solar cells according to the present invention has the effect of improving the mechanical properties by improving the transmittance and the crystallization rate of the polymer by miniaturizing the size of the crystal upon crystallization of the polymer.
Hereinafter, the present invention will be described in more detail, but for the purpose of describing the present invention, it is not intended to limit the scope of the present invention.
The present invention provides an adhesive sheet composition for a solar cell comprising an ethylene copolymer resin, an organic peroxide and an organic or inorganic nucleating agent.
The solar cell adhesive sheet composition may further include at least one additive selected from a crosslinking aid, a silane coupling agent, and an ultraviolet absorber.
Ethylene copolymer resin
The ethylene copolymer resin can be used without limitation so long as it is generally used in the art. Preferably, the ethylene copolymer resin may include a vinyl acetate content of 20 to 40% by weight, preferably 25 to 35% by weight in consideration of transparency, flexibility, impregnation of the organic peroxide, and the like. In addition, the ethylene copolymer resin may be used in the melt flow rate of 0.1 to 100g / 10 minutes, preferably 0.5 to 50g / 10 minutes at 190 ℃, 2160kg load in consideration of moldability and mechanical properties.
Suitable ethylene copolymer resins include, specifically, ethylene vinyl ester copolymers such as ethylene vinyl acetate copolymers; Ethylene-unsaturated carboxylic acid ester copolymers such as ethylene-methyl acrylate copolymer, ethylene-ethyl acrylate copolymer, ethylene-methyl methacrylate copolymer, ethylene-isobutyl acrylate copolymer, and ethylene n-butyl copolymer; Ethylene-unsaturated carboxylic acid copolymers such as ethylene-acrylic acid copolymers, ethylene-methacrylic acid copolymers, ethylene-isobutyl acrylate-methacrylic acid copolymers; And the ionomer etc. can be illustrated. Ethylene copolymer resin is an ethylene-vinyl acetate copolymer in consideration of the suitability to the required physical properties of the adhesive sheet composition for solar cells, such as moldability, transparency, flexibility, adhesion, light resistance, and impregnation of organic peroxides among the above-exemplified compounds. Preference is given to using.
Examples of commercially available ethylene-vinyl acetate copolymers include MA-10 (32% vinyl acetate content, 40 g / 10 minutes melt flow rate) of TPC, KA-40 (28% vinyl acetate content, 20 g melt flow rate). Dupont's PV 1650 (vinyl acetate content 33%, melt flow rate 31g / 10min) PV 1400 (vinyl acetate content 32%, melt flow rate 43g / 10min) PV 1410 (vinyl acetate Content of 32%, melt flow rate of 43 g / 10 minutes) and the like.
It is preferable that the said ethylene copolymer resin is contained 94-99.5 weight part with respect to 100 weight part of whole adhesive sheet compositions for solar cells. If the ethylene copolymer resin is more than 99.5 parts by weight there is a problem that the curing is not, when less than 94 parts by weight there is a problem that the adhesive strength is inferior.
Organic peroxide
The organic peroxide includes at least one selected from a dialkyl peroxide type, an alkyl peroxy ester type or a peroxy ketone type.
The organic peroxide may be at least one selected from the alkyl peroxy ester type. In addition, the organic peroxide may include at least one selected from a dialkyl peroxide type, and at least one selected from an alkyl peroxy ester type and a peroxy ketone type.
As the organic peroxide of the dialkyl peroxide type, an organic peroxide having a half-life temperature of 130 hours to 160 ° C, preferably 135 to 150 ° C may be used.
The dialkyl peroxide type organic peroxide is specifically dicumyl peroxide (135 ° C.), 1,3-bis (2-t-butylperoxyisopropyl) hexane (137 ° C.), 2,5-dimethyl-2, 5-bis (tertiary butyl peroxy) hexane (140 degreeC), t-butyl cumyl peroxide (142 degreeC), di-t-butyl peroxide (149 degreeC), etc. can be illustrated. The organic peroxides of the above-described dialkylperoxide type may be used alone or in combination of two or more thereof.
As the organic peroxide of the alkyl peroxy ester type, an organic peroxide having a half life temperature of 100 to 130 ° C. may be used.
The alkyl peroxy ester type organic peroxide is specifically t-butyl peroxy isobutylate (102 ℃), t-butyl peroxy maleic acid (110 ℃), t-butyl peroxy isopropyl carbonate (119 ℃), t -Butyl peroxy 2-ethylhexyl carbonate (121 degreeC), 2,5-dimethyl-2,5-bis (benzoyl peroxy) hexane (118 degreeC), t-butyl peroxy acetate (123 degreeC), t-butyl Peroxy benzoate (125 degreeC) etc. can be illustrated. The organic peroxides of the alkylperoxy ester type exemplified above may be used alone or in combination of two or more thereof.
As the peroxyketone type organic peroxide, an organic peroxide having a half-life temperature of 100 ° C. to 140 ° C. may be used.
The peroxyketone type organic peroxide is specifically 1,1-bis (t-butylperoxy) 3,3,5-trimethylcyclohexane (112 ° C.), 1,1-bis (t-butylperoxy) cyclo Hexane (112 ° C), 1,1-bis (t-amylperoxy) cyclohexane (112 ° C), 2,2-bis (t-butylperoxy) butane (119 ° C), ethyl-3,3-di Peroxy ketones, such as (t-butyl peroxy) butyrate (135 degreeC), etc. can be illustrated. The peroxyketone type organic peroxides exemplified above may be used alone or in combination of two or more thereof.
Preferably, when the adhesive sheet composition for a solar cell is to be manufactured in a fast curing type, the organic peroxide is preferably used at least one selected from the alkyl peroxy ester type.
In addition, when the adhesive sheet composition for solar cells is to be manufactured in a standard hardening type rather than a fast curing type, the organic peroxide is at least one selected from a dialkyl peroxide type, and at least one selected from an alkyl peroxy ester type and a peroxy ketone type. It is preferable that it is a mixture form which mixes. At this time, the mixing ratio is not limited, but based on 100 parts by weight of the mixture 10 to 90 parts by weight of the organic peroxide of the dialkyl peroxide type, consisting of 90 to 10 parts by weight of the organic peroxide of the alkyl peroxy ester type and peroxy ketone type It is good.
The organic peroxide may be 0.2 to 4 parts by weight, preferably 0.5 to 3 parts by weight, based on 100 parts by weight of the ethylene copolymer resin. If the amount of the organic peroxide used is less than 0.2 parts by weight, there is a problem in that the ethylene copolymer resin cannot be sufficiently crosslinked. If the amount of the organic peroxide is more than 4 parts by weight, the crosslinking rate may be increased, but the shrinkage may increase and yellowing may not be prevented.
Nuclear agent
The organic or inorganic nucleating agent is added to improve mechanical properties such as transmittance and tensile strength of the solar cell adhesive sheet.
The organic nucleating agent is composed of 1,3-2,4-dibenzylidene sorbitol, 1,3-2,4-diparamethylbenzylidene sorbitol, crosslinked polystyrene particles, crosslinked polymethacrylate acrylate particles and crosslinked silicone resin particles. At least one selected from the group can be used. As the inorganic nucleating agent, at least one selected from the group consisting of glass beads, talc, mica, quartz, feldspar, bentonite, kaolin clay, jade, silica, calcite, TiO2, and fiberglass can be used.
The organic or inorganic nucleating agent is suitably added in an amount of 0.1 to 1 parts by weight, preferably 0.1 to 0.5 parts by weight, based on 100 parts by weight of the ethylene copolymer resin. If the addition amount of the organic or inorganic nucleating agent is less than 0.1 parts by weight based on the above reference, there is no effect of improving the transmittance and mechanical properties of the adhesive sheet for solar cells manufactured. .
Various additives
Other various additives can be added to the adhesive sheet composition for solar cells of this invention as needed. Specific examples of such additives include crosslinking aids, silane coupling agents, ultraviolet absorbers, and the like. The silane coupling agent may improve the adhesiveness between the low iron tempered glass and the back sheet and the solar cell adhesive sheet when manufacturing the solar cell after manufacturing the solar cell adhesive sheet with the adhesive sheet composition for solar cells.
Examples of the silane coupling agent include a compound having a hydrolyzable group such as an alkoxy group together with a ball saturation group such as a vinyl group, an acryloxy group or a methacrylic group, an amino group, an epoxy group and the like.
Specific examples of the silane coupling agent include N- (β-aminoethyl) -aminopropyltrimethoxysilane, N- (β-aminoethyl) -aminopropylmethyldimethoxysilane,
It is suitable to add about 0.1-2 weight part of said silane coupling agents with respect to 100 weight part of ethylene copolymer resins. If it is out of the range, the effect of adhesive strength is inferior.
The ultraviolet absorbent may help to block ultraviolet rays and to improve durability. As said ultraviolet absorber, a benzophenone series, a benzotriazole series, a triazine system, a salicylic acid ester system, etc. can be used specifically ,. Commercially available UV absorbers include TINUVIN 328, TINUVIN 1577 FF, TINUVIN 120, and Cimasorb 81 from Ciba, Sumitosorb Chemical, Sumisorb 130, Sumisorb 350, Sumisorb 110, Seesorb 102 from Ciprocasei, seesorb 707, seesorb 101 can be used.
It is preferable to mix | blend the said ultraviolet absorber about 0.1-2 weight part with respect to 100 weight part of ethylene copolymer resins. If less than 0.1 parts by weight of the ultraviolet absorber is added, there is no UV blocking effect, if more than 2 parts by weight of the yellowing problem occurs.
The crosslinking aid is effective in promoting the crosslinking reaction to increase the degree of crosslinking of the ethylene copolymer resin. The crosslinking aid may specifically include a polyunsaturated compound such as a polyallyl compound or a poly (meth) acryloxy compound. More specifically, the crosslinking aid is a polyallyl compound such as triallyl isocyanurate, triallyl cyanurate, diallyl phthalate, diallyl fumarate, diallyl maleate, ethylene glycol diacrylate, ethylene glycol dimethacryl And poly (meth) acryloxy compounds such as trimethylolpropane trimethacrylate, dinynebenzene and the like.
It is effective to mix | blend the said crosslinking adjuvant in the ratio of about 0.1-5 weight part with respect to 100 weight part of ethylene copolymers. If the added amount of the crosslinking aid is less than 0.1 part by weight, there is no effect of promoting crosslinking, and if it exceeds 5 parts by weight, there is a problem of yellowing.
The adhesive sheet composition for a solar cell comprising the above components promotes crystal formation in the ethylene copolymer resin and enhances physical properties by including an organic or inorganic nucleating agent so that the amorphous portion can improve the physical and optical properties by the crystalline portion. do. That is, the adhesive sheet composition for a solar cell according to the present invention improves mechanical properties by improving the transmittance and increasing the crystallization rate of the polymer by miniaturizing the size of the crystal when the polymer is crystallized.
The present invention provides a solar cell adhesive sheet prepared using the adhesive sheet composition for a solar cell.
The adhesive sheet for a solar cell according to the present invention can be produced by a known sheet forming method using a T-die extruder, a calendar molding machine and the like. For example, an organic peroxide, an organic or inorganic nucleating agent, a crosslinking aid, an ultraviolet absorber, a silane coupling agent, a light stabilizer, an antioxidant, and the like that may be added to the ethylene copolymer resin in advance may be dry blended in advance to provide a T-die extruder. It can supply by hopper and can obtain by extrusion molding into a sheet form.
The present invention provides a solar cell comprising a solar cell adhesive sheet produced by the above method.
1 is a schematic cross-sectional view of a solar cell according to an embodiment of the present invention. Referring to the accompanying drawings in more detail, the solar cell according to the present invention includes a solar cell element 1 and the solar cell element 1. And an upper protective material 2 disposed at an upper portion of the upper protective material 2 and a lower protective material 3 positioned at a lower portion of the solar cell device 1, wherein at least one of the solar cell device 1 and the upper and lower protective materials 2, 3 is disposed. The solar cell adhesive sheet 4 according to the present invention is formed. That is, at least one of the solar cell element 1 and the upper protective material 2 and between the solar cell element 1 and the lower protective material 3 is fixed by the solar cell adhesive sheet 4 according to the present invention. .
The manufacturing of the solar cell having the above structure is performed at a temperature at which the organic peroxide is not substantially decomposed and the solar cell adhesive sheet 4 is melted. The solar cell element 1 such as a silicon power generation element and the upper protective material ( The adhesive sheet 4 for solar cells is temporarily bonded between the low iron tempered glass corresponding to 2) and the low iron tempered glass or the back sheet corresponding to the lower protective material 3, and then heated up (100 to 150 ° C.) to provide sufficient adhesion. The crosslinking is carried out.
Hereinafter, the present invention will be described in more detail by the following examples and comparative examples, the following examples are only some specific examples of the present invention and are not intended to limit or limit the protection scope of the present invention.
< Example 1>
100 parts by weight of ethylene / vinyl acetate copolymer (TPC MA-10; vinyl acetate content: 32%) 1 part by weight of Alchema TBEC with organic peroxide, 0.1 part by weight of NU500PP as organic nucleating agent, KBM- as silane coupling agent 503 0.5 parts by weight, ultraviolet absorber 0.3 parts by weight of 2-hydroxy-4-n-octoxybenzophenone (Sumitomo Chemical Co., Ltd. sumisorb 130) was subjected to a mixer at 25 ° C for 1 hour, and a planetary industrial single extruder (screw diameter 40mm, L / D = 26) to prepare a 0.5 mm adhesive sheet at a processing temperature of 90 ° C.
< Example 2>
A 0.5 mm adhesive sheet was prepared in the same manner as in Example 1 except that 0.5 parts by weight of NU500PP instead of 0.1 parts by weight of the organic nucleating agent was used.
< Example 3>
A 0.5 mm adhesive sheet was prepared in the same manner as in Example 1 except that 0.1 part by weight of Sumitomo XCIA was used instead of 0.1 part by weight of NU500PP as the organic nucleating agent.
< Example 4>
A 0.5 mm adhesive sheet was prepared in the same manner as in Example 1 except that 0.1 part by weight of PF-60, an inorganic nucleus agent, was used instead of 0.1 part by weight of NU500PP as the organic nucleating agent.
< Example 5>
A 0.5 mm adhesive sheet was prepared in the same manner as in Example 1 except that 1 part by weight of alkema lufenox 101 was used instead of 1 part by weight of organic peroxide Alchema TBEC.
< Example 6>
A 0.5 mm adhesive sheet was prepared in the same manner as in Example 1 except that 0.8 parts by weight of Alchema's TBEC and 0.2 parts by weight of Alchema's Luphenox 101 were used instead of 1 part by weight of the organic peroxide.
< Example 7>
A 0.5 mm adhesive sheet was prepared in the same manner as in Example 1 except that 1 part by weight of NU500PP was used instead of 0.1 part by weight of the organic nucleating agent.
< Comparative example 1>
100 parts by weight of an ethylene-vinyl acetate copolymer (TPC MA-10; vinyl acetate content of 32%) is an organic peroxide of 1 part by weight of Alchema TBEC, 0.5 parts by weight of Cinetsu KBM 503 as a silane coupling agent, and 2 as an ultraviolet absorber. 0.3 parts by weight of -hydroxy-4-n-octoxybenzophenone (Sumitomo Chemical Co., Ltd. sumisorb 130) was subjected to a mixer at 25 ° C for 1 hour, using a planetary industrial single extruder (screw diameter of 40 mm, L / D = 26), A 0.5 mm adhesive sheet was produced at a processing temperature of 90 ° C.
< Comparative example 2>
A 0.5 mm adhesive sheet was prepared in the same manner as in Comparative Example 1 except that 1 part by weight of alkema lufenox 101 was used instead of 1 part by weight of organic peroxide Alchema TBEC.
< Comparative example 3>
A 0.5 mm adhesive sheet was prepared in the same manner as in Comparative Example 1 except that 0.8 parts by weight of Alchema's TBEC and 0.2 parts by weight of Alchema's Lufenox 101 were used instead of 1 part by weight of organic peroxide.
< Comparative example 4>
A 0.5 mm adhesive sheet was prepared in the same manner as in Comparative Example 1 except that 0.05 part by weight of NU500PP was added as an organic nucleating agent.
< Comparative example 5>
A 0.5 mm adhesive sheet was prepared in the same manner as in Comparative Example 1 except that 1.5 parts by weight of NU500PP was added as an organic nucleating agent.
< Experimental Example >
Using the adhesive sheets prepared in Examples 1 to 7 and Comparative Examples 1 to 5 measured the physical properties as follows and the results are shown in Table 1.
1. Transmittance Measurement
The 0.5 mm adhesive sheet prepared between the low iron reinforced glass and the back sheet was put and melt-bonded by using a vacuum bonding machine at 150 ° C. for 20 minutes, and the transmittance was measured using UV (UV 2450 manufactured by SHIMADZU Co., Ltd.) according to JIS K7105.
2. The tensile strength
A 0.5 mm prepared adhesive sheet was prepared according to ASTM D-412, and tensile strength was measured using an Instron UTM.
As shown in Table 1, in the case of adding the nucleating agent, it can be confirmed that the transmittance is high and the tensile strength is superior to the comparative example without the nucleating agent added.
1 is a schematic cross-sectional view of a solar cell according to an embodiment of the present invention.
Claims (9)
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020090057145A KR101070670B1 (en) | 2009-06-25 | 2009-06-25 | Adhesive sheet composition for solar battery, adhesive sheet and solar battery using the same |
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| KR1020090057145A KR101070670B1 (en) | 2009-06-25 | 2009-06-25 | Adhesive sheet composition for solar battery, adhesive sheet and solar battery using the same |
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| KR101070670B1 true KR101070670B1 (en) | 2011-10-07 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000183381A (en) * | 1998-12-17 | 2000-06-30 | Bridgestone Corp | Solar cell and sealing film for solar cell and the solar cell |
| JP2007123488A (en) * | 2005-10-27 | 2007-05-17 | Sekisui Chem Co Ltd | Adhesion sheet for solar cells |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000183381A (en) * | 1998-12-17 | 2000-06-30 | Bridgestone Corp | Solar cell and sealing film for solar cell and the solar cell |
| JP2007123488A (en) * | 2005-10-27 | 2007-05-17 | Sekisui Chem Co Ltd | Adhesion sheet for solar cells |
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