Influence Of SINx H And SIOx Films On Optical And Electrical Properties Of Antireflective Coatings For Silicon Solar Cells

ABSRTACT To increase the photon transmission in solar cells based on multicrystalline silicon two different double layer antireflections DARC1 and DARC2 were optimized and simulated to optimize the antireflection double layer we have developed a numerical simulation code with Matlab software package where we have used the method of transfer matrix to solve the optical equation. These solutions permit us to plot the optical reflectivity and the absorption versus wavelengths and layer thicknesses. The optical refractive index and thicknesses of considered materials which allowed us to have the best results of reflection were used to simulate the electrical properties of the cell with PC1D software. Thus our results showed that the average reflectivity of 5.4 and 6.4 is obtained with a DARC2composed of two different layers of hydrogenated silicon nitride SiNx H and silicon oxide SiO2 and DARC1 composed of two layers of silicon nitride hydrogenated SiNx H with optical indexes and thicknesses different respectively. These optimized structures have the potential to increase the short-circuit current by more than 1.8 with a DARC1 and up 3.3 with a DARC2 for non-encapsulated cells in comparison with the standard single SiNxH ARC.