# US 9,520,518 B2 · Solar cell module

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 9,520,518 B2
- Document ID: US9520518B2
- Status: Granted
- Kind: B2
- Application number: 14/401,665
- Filed: 2013-05-15
- Published: 2015-05-28
- Granted: 2016-12-13
- Earliest claimed: 2012-05-16
- Assignees: Mitsui Chemicals Tohcello, Inc.
- Applicants: Mitsui Chemicals Tohcello, Inc.
- Inventors: Takanobu Murofushi
- Web page: https://patentgrep.com/patent/US9520518B2

## CPC

- H10F 19/804: {Materials of encapsulations}
- B32B 17/10036: {comprising two outer glass sheets}
- B32B 17/10678: {comprising UV absorbers or stabilizers, e.g. antioxidants}
- B32B 17/10788: {containing ethylene vinylacetate}
- C08K 5/134: Phenols containing ester groups
- C08K 5/3475: condensed with carbocyclic rings
- H02S 20/23: specially adapted for roof structures
- H10F 19/80: Encapsulations or containers for integrated devices, or assemblies of multiple devices, having photovoltaic cells
- H10F 19/85: Protective back sheets
- C08L 23/08: Copolymers of ethene (C08L23/16 takes precedence)
- Y02B 10/10: Photovoltaic [PV]
- Y02E 10/50: Photovoltaic [PV] energy
- H10F: INORGANIC SEMICONDUCTOR DEVICES SENSITIVE TO INFRARED RADIATION, LIGHT, ELECTROMAGNETIC RADIATION OF SHORTER WAVELENGTH OR CORPUSCULAR RADIATION
- B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09)
- H02S: GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES (obtaining electrical energy from radioactive sources G21H1/12; light sensitive inorganic semiconductor devices H10F; light sensitive organic semiconductor devices H10K30/00; thermoelectric devices H10N10/00; pyroelectric devices H10N15/00)
- C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06)
- Y02B: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

## Abstract

Provided is a solar cell module wherein a rear surface protective sheet has excellent long-term durability, and transmissivity of ultraviolet that reaches the solar cell is retained for a long time. This solar cell module is configured by laminating a front surface protective sheet, a light receiving-side sealing sheet, a solar cell element, a rear surface-side sealing sheet, and a rear surface protective sheet in this order. The solar cell module is characterized in that the light receiving-side sealing sheet has a transmissivity of 50% or more with respect to light having a wavelength of 300 nm, and the rear surface-side sealing sheet contains a reactive ultraviolet absorbent.

## Claims

### Claim 1

A solar cell module comprising:
a surface-protective sheet;
a light-receiving-side encapsulation sheet;
a solar cell element;
a back-side encapsulation sheet; and
a rear protective sheet laminated in the order presented, wherein
the light-receiving-side encapsulation sheet has 50% or higher transmittance of light having a wavelength of 300 nm, and
the back-side encapsulation sheet comprises a reaction product of a reactive ultraviolet absorber and a resin component, wherein the resin component is an ethylene-polar monomer copolymer or an ethylene-α-olefin copolymer and the reactive ultraviolet absorber contains a reactive functional group which is an unsaturated group having a carbon-carbon double bond which reacts with a molecular backbone of the ethylene-polar monomer copolymer or the ethylene-α-olefin copolymer of the resin component.

### Claim 2 (depends on 1)

The solar cell module according to claim 1, wherein the reactive ultraviolet absorber comprises a group selected from an acryloyl group, a methacryloyl group, and an allyl group.

### Claim 3 (depends on 1)

The solar cell module according to claim 1, wherein the reactive ultraviolet absorber is at least one compound selected from 2-[2-hydroxy-5-[2-(methacryloyloxy)ethyl]phenyl]-2H-benzotriazole, 2-(4-allyloxy-2-hydroxyphenyl)-2H-benzotriazole, 2-(4-acryloyloxy-2-hydroxyphenyl)-2H-benzotriazole, and 2-(4-benzoyl-3-hydroxyphenoxy)ethyl propenoate.

### Claim 4 (depends on 1)

The solar cell module according to claim 1, wherein an amount of the reactive ultraviolet absorber is 0.01 to 0.5 parts by weight with respect to 100 parts by weight of the ethylene-polar monomer copolymer or the ethylene-α-olefin copolymer.