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Resin composition for solar cell-sealing material

A technology of solar cells and resin compositions, applied in circuits, photovoltaic power generation, electrical components, etc., can solve the problems of high efficiency, long life, decreased adhesion of protective parts, and deterioration of transparency, etc., to improve the initial Conversion efficiency, suppression of reduction in conversion efficiency, and good transparency

Active Publication Date: 2012-01-18
TOYO INK SC HOLD CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, ethylene vinyl acetate copolymers have problems in that deterioration of transparency, corrosion of electrode wiring, and adhesion to protective members are induced due to generation of acid accompanying deterioration by heat or water, or water vapor intruding into the module. Adhesion decreases, resulting in a decrease in conversion efficiency
Therefore, although the acid receiving effect can be obtained, the molecular weight decreases due to the increase in the amount of acid generated, thus causing the physical properties of the ethylene vinyl acetate copolymer to decrease.
As a result, high efficiency and long life have not yet been achieved

Method used

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  • Resin composition for solar cell-sealing material
  • Resin composition for solar cell-sealing material
  • Resin composition for solar cell-sealing material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0119] Hereinafter, the present invention will be described in further detail based on examples, but the present invention is not limited thereto. Parts mean parts by weight, and % means % by weight.

[0120] (A) Ethylene copolymer

[0121] (A-1) manufactured by TOSOH (Ultrathene 751, ethylene vinyl acetate copolymer, vinyl acetate content: 28%, MFR: 5.7)

[0122] (A-2) Made by TOSOH (Ultrathene 637-1, ethylene vinyl acetate copolymer, vinyl acetate content: 20%, MFR: 8.0)

[0123](A-3) Mitsui-DUPONT.Polychemical Co., Ltd. (Evaflex V523, ethylene vinyl acetate copolymer, vinyl acetate content: 33%, MFR: 14)

[0124] (B) Layered composite metal compound and its fired product

[0125] Table 1 shows the chemical combinations of (B-1) to (B-10).

[0126] (B-11): A fired product obtained by heat-treating the layered composite metal compound (B-1) at 550°C for 3 hours

[0127] (B-12): A fired product obtained by heat-treating the layered composite metal compound (B-3) at 400°C ...

Embodiment 2～17 and comparative example 1～13

[0152] Solar cell encapsulating materials 12A, 12B, 16 , 18 , and 21 were produced by adjusting the resin composition for solar cell encapsulating materials in the same manner as in Example 1 except having used the blends shown in Tables 3 and 4, respectively.

[0153]

[0154]

[0155] The test pieces obtained in Examples 1 to 17 and Comparative Examples 1 to 13 were evaluated by the following criteria, and the evaluation results are shown in Table 5.

[0156] [acid capture effect]

[0157] produced as figure 2 The sample used for the durability test is shown. First, the solar cell encapsulation material 16 obtained in Examples 1 to 17 was sandwiched with a transparent substrate (glass, thickness 3 mm) 15 and a protective member 17 of a hydrolysis-resistant polyethylene terephthalate film (thickness 0.1 mm). And as a laminate. Thereafter, the encapsulating material was cross-linked by heat-compression bonding at 150° C. for 35 minutes under vacuum using a vacuum lam...

Embodiment 18

[0173] 85 parts by weight of an ethylene copolymer and 15 parts by weight of a layered composite metal compound were put into a high-speed mixer (manufactured by Mitsui Mining) and stirred at a temperature of 20° C. for 3 minutes, then passed through a twin-screw extruder ( Nippon Placon Co., Ltd.) obtained a layered composite metal compound masterbatch. Furthermore, a cross-linking agent masterbatch in which a cross-linking agent, a cross-linking auxiliary agent, and a silane coupling agent are blended in an ethylene copolymer, and a masterbatch in which an ultraviolet absorber, a light stabilizer, and an antioxidant are blended in an ethylene copolymer have been obtained. Stabilizer masterbatch.

[0174] Using the obtained layered composite metal compound masterbatch, crosslinking agent masterbatch, stabilizer masterbatch, and ethylene copolymer, it was prepared so that the ethylene copolymer (A) and the layered composite metal compound or its fired product became the formul...

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Abstract

Disclosed is a resin composition for a solar cell-sealing material, which enables the improvement in initial conversion efficiency of a solar cell module, the prevention of the deterioration in transparency of a resin, the prevention of the deterioration in adhesion to a protective member as time elapsed, and the prevention of the reduction in conversion efficiency. The resin composition comprises an ethylene copolymer and at least one substance selected from (i) a compound represented by formula (1), (ii) a burned product of the substance (i), (iii) a compound represented by formula (2) and (iv) a burned product of the substance (iii). The substance (i) has an average plate surface diameter of 0.01 to 0.9 [mu]m and a refractive index of 1.45 to 1.55, and the substance (iii) has an average plate surface diameter of 0.02 to 0.9 [mu]m and a refractive index of 1.48 to 1.6. Mg1-aAla(OH)2Ann- a / nbH2O formula (1) (0.2 <= a <= 0.35, 0 <= b <= 1, An: an anion having a valency of n) (McMg1-c)1-dAld(OH)2Bmm- d / meH2O formula (2) (M represents a metal selected from Ni, Zn and Ca, 0.2 <= c <= 1, 0.2 <= d <= 0.4, 0 <= e <= 4, Bm: an anion having a valency of m).

Description

technical field [0001] The invention relates to a resin composition for solar cell encapsulation materials used for solar cell encapsulation materials. Background technique [0002] In recent years, from the standpoints of breaking away from the nuclear power generation policy, responding to the surge in crude oil, responding to the depletion of fossil fuels, and responding to global environmental protection, the entire society has demanded the practical application and use of inexhaustible and environmentally friendly solar photovoltaic power generation systems Expand the import. The main solar photovoltaic power generation system currently being introduced is composed of silicon-based solar cell modules such as crystalline silicon or amorphous silicon, and peripheral equipment. However, the biggest issue in introducing a large number of solar photovoltaic power generation systems is cost reduction. In recent years, although the cost has been greatly reduced compared with ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/08C08K3/22C08K9/00C08J3/22H01L31/0203
CPCC08L23/08Y02E10/50H01L31/048C08L23/0869C08L23/0861C08K2003/2217C08K2003/2227C08K2003/2224C08K3/22H01L31/0481C08L2666/02C08L3/10C08K3/26C08L33/04H01L31/04
Inventor 増子启介福留康弘小野田雄介沢田诚司大井聪高桥英记
Owner TOYO INK SC HOLD CO LTD