THEORETICAL ASSESSMENT OF USING GRATINGS AND DISTRIBUTED-BRAGG-REFLECTORS FOR IMPROVING SOLAR CELLS EFFICIENCY

摘要

Using wave optics approach, we have studied the light-trapping ability of a combination of grating and distributed-Bragg-reflectors (GDBR) in the rear face of a conventional thick, flat solar cell. We have analyzed structures that not only can provide reflectivity close to 100%, but that can also increase the path-length enhancement of internal confined rays for a certain wavelength range. Thus, the amount of energy absorbed in the active layer of the cell can also be increased.