| 摘要 |
Provided is an encapsulating material for solar cell which is capable of suppressing the leakage of the encapsulating material for solar cell and the contamination of a manufacturing apparatus during the manufacturing of a solar cell module, furthermore, suppresses the cracking of solar cell elements, and also has excellent long-term reliability. The encapsulating material for solar cell of the present invention is an encapsulating material for solar cell including an ethylene/±-olefin copolymer and an organic peroxide having a one-minute half-life temperature in a range of 100°C to 170°C. In addition, the complex viscosity of the encapsulating material for solar cell, which is measured through solid viscoelasticity measurement under conditions of a measurement temperature range of 25°C to 150°C, a frequency of 1.0 Hz, a rate of temperature increase of 10°C/minute, and a shear mode, has the minimum value (· *1 ) of the complex viscosity at a temperature in a range of 100°C to lower than 135°C, the minimum value (· *1 ) of the complex viscosity is in a range of 6.0×10 3 Pa·s to 4.0×10 4 Pa·s, the complex viscosity (· *2 ) of the encapsulating material for solar cell at 150°C is in a range of 2.0×10 4 Pa·s to 1.0×10 5 Pa·s, and the content of the organic peroxide in the encapsulating material for solar cell is in a range of 0.1 parts by weight to 3 parts by weight with respect to 100 parts by weight of the ethylene/±-olefin copolymer. In addition, an encapsulating material for a back surface of a solar cell which includes the ethylene/±-olefin copolymer as a component and does not easily sneak into a solar cell element is also included in the scope of the present invention. |
