HIGHLY REFLECTIVE AND HIGHLY DURABLE MULTI-LAYERED COATING SUBSTRATE USEFUL FOR BACKSIDE REFLECTION OF SOLAR BATTERY MODULE AND METHOD FOR PRODUCING SAME

摘要

The present invention relates to a highly reflective and highly durable multi-layered coating substrate useful for backside reflection of a solar battery module and a method for producing the same. More specifically, the multi-layered coating substrate includes a dielectric layer, a first reflection-assisting metal layer, a metal reflective layer, a second reflection-assisting metal layer, a low-refractive dielectric layer, and a highly refractive dielectric layer, laminated on a transparent substrate in the above order. The solar battery module, especially a glass-to-glass type solar battery module, can be used as a reflective material on the backside to prevent damage to a reflective layer due to scratches or external impacts, since the module has excellent mechanical strength, and can also be used in harsh conditions such as hot desserts while maintaining high solar reflection rates, since the module has high durability. Therefore, the durability of the solar battery module can be guaranteed, at the same time demonstrating insulation function to prevent the decline of the module output due to an increase of leakage current of the solar battery module. The light reflection rate at wavelengths of 380 to 1100 nm is over 85%, and the light reflection rate at wavelengths of 1100 to 2500 nm is over 85%. Thus, the light reflected from the backside reflective layer is capable of enhancing the power generation output of the solar battery cell.;COPYRIGHT KIPO 2016