Abstract
The conversion efficiency of light-electricity of the solar battery decreases when the temperature rises. To prevent this rise in temperature of the solar battery, wavelength selective transmission thin films that cut the 1000 nm-1400 nm wavelength range were developed. In this research, a solar battery provided with wavelength selective transmission thin films was made for trial purposes, and was compared to a past solar battery. When light was irradiated on the solar battery by using a source of light with heat rays, the rise of the surface temperature of the solar battery made for trial purposes was suppressed. The conversion efficiency of the solar battery was studied by using artificial sunlight, too. From the results, it was found that the new prototype of the solar battery is better than the old one. Therefore, it was understood that the wavelength selective transmission thin films were effective for improving the efficiency of the solar battery through suppressing the temperature as described above.
