| 摘要 |
PURPOSE:To raise photoelectric conversion efficiency by a method in which solar cells are set on the front and back sides of light shield plates and light reflected on the front solar cell is received by the back solar cell. CONSTITUTION:A front solar cell 10 is set on the front of a light shield plate 1 constituting a blind, and a back solar cell 11 is set on the back. As the back solar cell 11, an amorphous silicon-germanium solar cell having a sensitivity toward long wavelength side compared to the cell 10 is used. The sunlight 7 is received by the cell 10 and the reflected light of long wavelength from the cell 10 is received by the cell 11. The incoming solar energy can thus be effectively utilized and the blind having high photoelectric conversion efficiency can be obtained. |
