| 摘要 |
A solar cell comprises a layer of photoconductive material 2, between two reflective layers 5,10; the reflective layers include a first wavelength-specific layer 10 for reflecting light of wavelengths greater than a cut-off value and a second fully reflective layer 5; a luminescent material 3 is provided within the structure for wavelength-shifting the incident radiation to wavelengths longer than the cut-off value of the first reflective layer 10, but below the absorption edge of the photoconductive material 2, where light is trapped between the two reflective layers 5,10 within the photoconductive material 2. The photoconductive material 2 is preferably silicon. The present invention allows for the path length of light within the photoconductive material 2 to be much greater for a relatively smaller thickness of material 2. |
