THIN SHEET FOR SOLAR CELL MODULE

1 . A thin sheet for a solar cell module, comprising a substrate and at least one fluoro-containing coating layer, wherein the fluoro containing coating layer comprises:

(a) at fluoro resin, comprising at homopolymer or a copolymer formed with a fluoro olefin monomer selected from the group consisting of monofluoroethylene, vinylidene fluoride, chlorotrifluoroethylene, tetrafluoroethylene, hexafluoropropylene, and at combination thereof;

(b) an adhesion promoter of the formula:

R 1 Si(R 2 ) 3 ,

wherein R 1 is an organic group having a terminal amino, isocyanate group, epoxy group, vinyl or (meth)acryloxy, R 2 is each independently selected from the group consisting of a linear or branched C 1-4 alkyl, a linear or branched C 1-4 alkoxy, and hydroxyl; and

(c) an adhesion co-promoter.

2 . The thin sheet according to claim 1 , wherein the fluoro resin comprises as homopolymer or a copolymer formed with a fluoro olefin monomer selected from the group consisting of chlorotrifluoroethylene, tetrafluoroethylene, and a combination thereof.

3 . The thin sheet according to claim 1 , wherein the fluoro resin comprises a copolymer formed with chlorotrifluoroethylene and a vinyl alkyl ether monomer.

4 . The thin sheet according to claim 3 , wherein the vinyl alkyl ether monomer is selected from the group consisting of a vinyl linear alkyl ether monomer, a vinyl branched alkyl ether monomer, a vinyl cycloalkyl ether monomer, a vinyl hydroxyalkyl ether monomer, and a combination thereof.

5 . The thin sheet according to claim 1 , wherein the fluoro resin is present in an amount of 20% to 95%, based on the total weight of the solids content of the fluoro-containing coating layer.

6 . The thin sheet according to claim 1 , wherein the adhesion promoter is present in an amount of 0.5 wt % to 15 wt %, based on the total weight of the solids content of the fluoro-containing coating layer.

7 . The thin sheet according to claim 1 , wherein the substrate comprises a polyester resin, a polyacrylate resin, a polyolefin resin, a polycycloolefin resin, a polyamide resin, a polyimide resin, a polycarbonate resin, a polyurethane resin, a polyvinyl chloride, triacetyl cellulose, polylactic acid or a combination thereof.

8 . The thin sheet according to claim 1 , wherein R 1 is a group having the structure below:

wherein R is a covalent bond, a linear or branched C 1-4 alkylene, or a phenylene optionally substituted with 1 to 3 substituents independently selected from a linear or branched C 1-4 alkyl.

9 . The thin sheet according to claim 1 , wherein R 2 is each independently selected from the group consisting of methoxy, ethoxy, propoxy, methyl, ethyl, and propyl.

10 . The thin sheet according to claim 8 , wherein the adhesion promoter is:

11 . The thin sheet according to claim 1 , wherein the adhesion co-promoter is a thermoplastic resin.

12 . The than shoot according to claim 11 , wherein the thermoplastic resin has a glass transition temperature lower than 150° C.

13 . The thin sheet according to claim 11 , wherein the thermoplastic resin is selected from the group consisting of a polyurethane resin, an ethylene-vinyl acetate resin, an acrylic based resin, a polyester resin and a combination thereof.

14 . The thin sheet according to claim 13 , wherein the thermoplastic resin is an acrylic based resin.

15 . The thin sheet according to claim 1 , wherein the adhesion promoter is present in an amount of 1% to 9%, based on the total weight of the solids content of the fluoro-containing coating layer.

16 . The thin sheet according to claim 1 , wherein the adhesion co-promoter is present in an amount of 5% to 20%, based on the total weight of the solids content of the fluoro-containing coating layer.

17 . A solar cell module, comprising the thin sheet according to claim 1 .