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 SiNx:H ARC.