| 摘要 |
PROBLEM TO BE SOLVED: To provide a solar cell module using an ethylene-vinyl acetate copolymer as a seal material that solves a problem that, when acetic acid generated from the ethylene-vinyl acetate copolymer can cause a degradation of the solar cell and a terminal and decrease in the volume resistivity value, reducing the ratio of the ethylene-vinyl acetate unit to restrain the formation of acetic acid will lower the transparency of the ethylene-vinyl acetate copolymer sheet, thus resulting in a reduction in the power generation efficiency of the solar cell module due to less transmission of sunlight, and will lower the flexibility of the ethylene-vinyl acetate copolymer sheet, thus causing the solar cell to be easily broken when laminated.SOLUTION: The seal material for a solar cell module is composed of a sheet containing an ethylene-vinyl acetate copolymer and fluorine-containing oligomer, and the content ratio of the fluorine-containing oligomer in the sheet is 0.1 to 1.0 pts.mass in respect to 100 pts.mass of the ethylene-vinyl acetate copolymer with a 180-degree peel strength being equal to or greater than 15 N/cm. |
