KR101070672B1 - 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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- KR101070672B1 KR101070672B1 KR1020090057149A KR20090057149A KR101070672B1 KR 101070672 B1 KR101070672 B1 KR 101070672B1 KR 1020090057149 A KR1020090057149 A KR 1020090057149A KR 20090057149 A KR20090057149 A KR 20090057149A KR 101070672 B1 KR101070672 B1 KR 101070672B1
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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.
Adhesive sheet composition for solar cells according to the present invention comprises an ethylene copolymer resin, organic peroxide and thermally conductive particles.
Accordingly, the adhesive sheet composition for a solar cell according to the present invention can emit heat generated inside the solar cell to the outside of the solar cell even when exposed to external exposure for a long time when applied to the manufacturing process of the solar cell, the power generation efficiency of the solar cell module Can increase.
Solar cell, adhesive sheet, thermal conductivity
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, the configuration of the solar cell is generally manufactured by protecting the solar cell elements 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 elements and the protective material with an adhesive sheet. .
The place where the solar cell manufactured as described above is installed is generally a place where the sun shines on the roof of a house or a portable generator. In this case, heat is generated inside the solar cell, but the conventional solar cell has a problem in that power generation efficiency is less than 20% and more than 50% because the heat generated inside cannot be effectively released to the outside.
An object of the present invention is to provide an adhesive sheet composition for a solar cell that can emit heat generated inside the solar cell to the outside when exposed to the outside for a long time to increase the power generation efficiency of the solar cell.
Another object of the present invention is to provide a solar cell adhesive sheet which is manufactured using the adhesive sheet composition for solar cells that can emit heat generated inside the solar cell to the outside.
Still another object of the present invention is to provide a solar cell including the solar cell adhesive sheet.
In order to achieve the object of the present invention, in the adhesive sheet composition for solar cells comprising an ethylene copolymer resin and an organic peroxide, the adhesive sheet composition for solar cells comprising a thermally conductive particles to provide.
The thermally conductive particles consist of zinc oxide, aluminum oxide, titanium oxide, magnesium oxide, silicon oxide, aluminum hydroxide, magnesium hydroxide, aluminum nitride, boron nitride, silicon nitride, silicon carbide, diamond, aluminum, silver, copper, and graphite. It is preferred to include at least one selected from the group.
It is preferable that the average particle diameter of the said thermally conductive particle is 0.2-10 micrometers.
The thermally conductive particles are preferably those surface-treated with stearic acid, titanate coupling agent or silane coupling agent.
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 thermally conductive particles may be added in an amount of 0.1 to 10 parts by weight based on 100 parts by weight of the ethylene copolymer resin.
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 the other object of the present invention, the present invention provides a solar cell adhesive sheet characterized in that it is manufactured 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.
According to the present invention, the adhesive sheet composition for a solar cell further includes thermally conductive particles, so that the heat generated inside the solar cell even when exposed to the solar cell for a long time when the adhesive sheet prepared by using the same is applied to the solar cell. It can emit to the outside has the effect of increasing the power generation efficiency of the solar cell module.
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 and an organic peroxide and thermally conductive particles.
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 use a melt flow rate of 0.1 to 100 g / 10 minutes, preferably 0.5 to 50 g / 10 minutes at 190 ° C. and 2160 kg 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 and 40 g / 10 minutes melt flow rate) of TPC, KA-40 (28% vinyl acetate content and 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.
Thermal conductivity particle
The thermally conductive particles are added to release heat generated inside the solar cell to the outside to improve the performance of the solar cell's power generation efficiency.
The thermally conductive particles are not particularly limited, but zinc oxide, aluminum oxide, titanium oxide, magnesium oxide, silicon oxide, aluminum hydroxide, magnesium hydroxide, aluminum nitride, boron nitride, silicon nitride, silicon carbide, and diamond exhibiting excellent thermal conductivity. , Aluminum, silver, copper, and graphite may include at least one selected from the group consisting of. Although the form of the said thermally conductive particle is not specifically limited, For example, it is preferable to use what has an average particle diameter of 0.2-10 micrometers as microparticles | fine-particles. When the average particle diameter of the thermally conductive particles is less than 0.2 μm, there is a problem in that it is not evenly dispersed in the adhesive sheet composition for solar cells. In addition, when the average particle diameter of the thermally conductive particles exceeds 10㎛, there is a problem that the transmittance is lowered. Only one kind of thermally conductive particles having the same average particle diameter may be used as the thermally conductive particles, or two or more kinds of thermally conductive particles having different average particle diameters may be mixed and used. In addition, the particle size distribution of the thermally conductive particles is not particularly limited.
It is preferable to use what the said thermally conductive particle hydrophobized the surface. Examples of the hydrophobic surface treatment include surface treatment with stearic acid, titanate coupling agent or silane coupling agent.
It is suitable that the said thermally conductive particle adds 0.1-10 weight part with respect to 100 weight part of ethylene copolymer resins. If the amount of the thermally conductive particles is less than 0.1 parts by weight, there is a problem in that the effect of dissipating heat generated inside the solar cell is lowered, and if it exceeds 10 parts by weight, the transmittance is lowered.
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 adhesive sheet when manufacturing the solar cell module after the adhesive sheet is manufactured 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 Chimasorb 81 from Ciba, Sumisorb 130, Sumisorb 350, Sumisorb 110, Seesorb 102 from Ciprocase, and Seesorb 707 from Sumitomo Chemical. , seesorb 101 and the like 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 present invention provides a solar cell adhesive sheet consisting of the adhesive sheet composition described above.
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, organic peroxides, thermally conductive particles, crosslinking aids, ultraviolet absorbers, silane coupling agents, light stabilizers, antioxidants, and the like that may be added to the ethylene copolymer resin in advance may be dry blended beforehand to the hopper of the T-die extruder. It can obtain by supplying in the form of sheet | seat, and extruding in 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. It proceeds by crosslinking with
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 an ethylene-vinyl acetate copolymer (TPC MA-10; vinyl acetate content of 32%) with organic peroxide 1 part by weight of Alchema TBEC, 0.5 parts by weight of aluminum oxide with an average particle diameter of 3 μm, and silane 0.5 parts by weight of Shinnets KBM-503 as a coupling agent and 0.3 parts by weight of 2-hydroxy-4-n-octoxybenzophenone (sumisorb 130 from Sumitomo Chemical Co., Ltd.) at 25 ° C. for 1 hour, 0.5 mm adhesive sheet was produced at the processing temperature of 90 degreeC using the extruder (screw diameter 40mm, L / D = 26).
< Example 2>
A 0.5 mm adhesive sheet was prepared in the same manner as in Example 1 except that 3 parts by weight of aluminum oxide was used instead of 0.5 parts by weight of aluminum oxide as the conductive particles.
< Example 3>
A 0.5 mm adhesive sheet was produced in the same manner as in Example 1 except that 5 parts by weight of aluminum oxide was used instead of 0.5 parts by weight of aluminum oxide as the conductive particles.
< Example 4>
A 0.5 mm adhesive sheet was prepared in the same manner as in Example 1 except that 3 parts by weight of titanium oxide was used instead of 0.5 parts by weight of aluminum oxide as the conductive particles.
< 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 0.1 part by weight instead of 0.5 part by weight of aluminum oxide was used as the conductive particles.
< Example 8>
A 0.5 mm adhesive sheet was prepared in the same manner as in Example 1 except that 10 parts by weight of aluminum oxide was used instead of 0.5 parts by weight of aluminum oxide as the conductive particles.
< Comparative example 1>
100 parts by weight of an ethylene-vinyl acetate copolymer (TPC Corporation MA-10; vinyl acetate content of 32%) 1 part by weight of an organic peroxide t-butylperoxy 2-ethylhexyl carbonate (TBEC), a silane coupling agent 0.5 parts by weight of Tsusa KBM 503, 0.3 parts by weight of 2-hydroxy-4-n-octoxybenzophenone (Sumitomo Chemical Co., Ltd. sumisorb 130) as a UV absorber at 25 ° C. for 1 hour, and a planetary single extruder (screw diameter of 40 mm). , L / D = 26) to prepare a 0.5 mm adhesive sheet 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 parts by weight of aluminum oxide was added as conductive particles.
< Comparative example 5>
A 0.5 mm adhesive sheet was produced in the same manner as in Comparative Example 1 except that 15 parts by weight of aluminum oxide was added as conductive particles.
< Experimental Example >
Using the adhesive sheets prepared in Examples 1 to 8 and Comparative Examples 1 to 5 measured the physical properties as follows and the results are shown in Table 1.
1. Thermal conductivity
The prepared 0.5mm adhesive sheet was placed in a release paper / adhesive sheet / releasing paper, and then subjected to condensation using a vacuum bonding machine for 150 degrees for 20 minutes, and thermal conductivity was measured using a Technox HC-074 device.
As shown in Table 1, the adhesive sheet composition for solar cells of the embodiment including the thermally conductive particles according to the present invention showed a higher thermal conductivity than the comparative example without the thermally conductive particles.
1 is a schematic cross-sectional view of a solar cell according to an embodiment of the present invention.
Claims (11)
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| KR1020090057149A KR101070672B1 (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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| KR1020090057149A KR101070672B1 (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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| KR20100138563A KR20100138563A (en) | 2010-12-31 |
| KR101070672B1 true KR101070672B1 (en) | 2011-10-07 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101327010B1 (en) | 2011-12-20 | 2013-11-13 | 엘지이노텍 주식회사 | Solar cell and method of fabricating the same |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006036876A (en) * | 2004-07-26 | 2006-02-09 | Du Pont Mitsui Polychem Co Ltd | Sealing material for solar battery and solar battery module using the same |
| JP2007123488A (en) * | 2005-10-27 | 2007-05-17 | Sekisui Chem Co Ltd | Adhesion sheet for solar cells |
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- 2009-06-25 KR KR1020090057149A patent/KR101070672B1/en not_active IP Right Cessation
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006036876A (en) * | 2004-07-26 | 2006-02-09 | Du Pont Mitsui Polychem Co Ltd | Sealing material for solar battery and solar battery module using the same |
| JP2007123488A (en) * | 2005-10-27 | 2007-05-17 | Sekisui Chem Co Ltd | Adhesion sheet for solar cells |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101327010B1 (en) | 2011-12-20 | 2013-11-13 | 엘지이노텍 주식회사 | Solar cell and method of fabricating the same |
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| KR20100138563A (en) | 2010-12-31 |
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