A 1D optical modeling approach for simulation of white paint films is developed and implemented in the SunShine simulator. The paint film thickness, the pigment volume concentration, and the pigment/binder refractive index ratio, are studied and optimized to achieve the required optical properties for back reflector application. The results indicate that optimized white paint back reflectors exhibit improved reflectivity characteristics which results in an increased long-wavelength quantum efficiency of thin-film silicon solar cells.
COBISS.SI-ID: 8008788
Optical analysis and optimisation of rectangular-like diffraction gratings in amorphous silicon solar cell are carried out by means of a two-dimensional optical simulator FEMOS. Variations of geometrical parameters (period, height and duty-cycle) of the grating are performed and the optimal values for amorphous silicon solar cell are determined. Up to 35% increase in JSC is determined for a cell with optimal grating parameters in comparison to a cell with flat interfaces.
COBISS.SI-ID: 7603540
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
In the paper the developed two-dimensional optical model for the analysis of optical properties of thin-film solar cells with periodic textures (diffraction gratings) is presented briefly. The model is then used for the analysis of the potential of diffraction gratings as a back metal reflectors and scatterers in thin-film microcrystalline solar cells. The effects of enhanced scattering are analysed for the two types of gratings: rectangular-like and triangular-like. Optical losses related to surface plasmon effects at periodically textured metal back reflector (Ag) are investigated.
COBISS.SI-ID: 6422868