A concept of a modulated one-dimensional photonic-crystal (PC) structure is introduced as a back reflector for thin-film solar cells. Using layers of amorphous silicon and morphous silicon nitride with modulated thicknesses a reflectance close to 100% is achieved over a broad wavelength region 700–1300 nm. Simulations show that the short-circuit current of the cell with a modulated PC back reflector closely resembles that of a cell with an ideal reflector.
COBISS.SI-ID: 7079764
Two-dimensional optical model for simulation of thin-film solar cells with periodical textured interfaces is presented. The model is based on finite element method and uses triangular discrete elements for the structure description. Simulations of a microcrystalline silicon solar cell with a sinusoidal grating texture applied to the interfaces are carried out. The analysis and optimization of the two grating pameters—period and height of the grooves—are performed with respect to the maximal short-circuit current density of the cell.
COBISS.SI-ID: 7045972