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|1. (WO2017031827) COMPOSITE BACK SHEET FOR SOLAR CELL AND PREPARATION METHOD THEREFOR|
|Applicants:||EOPLLY NEW ENERGY TECHNOLOGY CO., LTD
|Title:||COMPOSITE BACK SHEET FOR SOLAR CELL AND PREPARATION METHOD THEREFOR|
Provided is a composite back sheet for a solar cell, comprising a first back sheet, a second back sheet and a third back sheet successively. Adhesive layers are also arranged between the first back sheet and the second back sheet and between the second back sheet and the third back sheet, and the first back sheet is adjacently connected to an EVA adhesive membrane for a solar cell. The composite back sheet is characterized in that the first back sheet is a polyvinylidene fluoride membrane; the second back sheet is a polyethylene terephthalate membrane; and the third back sheet is a composite membrane composed of polycarbonate-calcium fluoride-polyvinylidene fluoride. Also provided is a preparation method of the composite back sheet for a solar cell. The back sheet for a solar cell prepared by using the technical solution of the present invention has a strong sunlight reflectivity, can block ultraviolet rays in the air and enhance the aging resistance property of the back sheet, and can further diffuse infrared rays, so that the temperature of the back sheet is lowered, the heat dissipation effect is good, and the service life of the back sheet is prolonged.