Led floodlight 100w solar cell knowledge:

The zinc sulfide (Zas) used in solar cells has a band gap of 3.5 eV, and will absorb light having a wavelength shorter than 354 nm and light having a wavelength longer than 354 m. Therefore, all wavelengths of visible light are transparent, and colorless and transparent, so the Zns powder is white. For cadmium sulfide (CdS), E, = 2.6 eV, violet and blue light shorter than the wavelength of 477 nm are absorbed, and waves from red to green are transmitted, thus being yellow. Gallium phosphide (GaP) E. =2.2 evV, light shorter than the wavelength 564 nm (green) will be absorbed, yellow and red will pass through, and thus color. The absorption limit wavelength of the arsenic image (GaAs) is 820 nm, and the visible light (380-780 nm) can be completely absorbed, and the transmitted light cannot be seen, so it is black. The complementary color of the semiconductor can be applied to the pigment (drawing supplies).

Light with photon energy exceeding the semiconductor band gap will be absorbed, and the color of the semiconductor is the complementary color of the absorbed light.