Analysis of the effects of various physical and electrical parameters in the overall efficiency of a solar cell is critical in designing a high efficiency solar cell. In this work, a computer simulation using PC1D was used to analyze the effects of the most substantial parameters in a silicon solar cell. Absorber layer, emitter layer, antireflection coating layer and back surface field layer were studied especially in terms of doping levels, thicknesses and the optimal values to for these parameters were simulated and obtained. The final simulated solar cells were validated using a measured data of an industrial scale fabricated solar cell with the same parameters and the measured result was in a good conformity with the simulation data. According the performed studies and achieved results, understanding and estimating the effects of these substantial parameters and obtaining their optimal values using a simulation software is both beneficial and the most practical way for designing a high efficiency solar cell structure.
Reflectance spectra calculations of double and multi-layer antireflection coating (ARC) structures based on Fresnel equations were studied in this work. A detailed explanation of Fresnel equations was presented with different polarization of incoming light for multi-layer antireflection coatings for solar cell applications. TiO2/SiNx, MgF2/ZnS thin film stacks for double layer ARC and SiO2/Al2O3/TiO2, MgF2/SiO2/TiO2 thin film stacks for multi-layer ARC were studied. Transfer matrix method and PC1D simulation software were used additionally to simulate crystalline silicon solar cells with considered double and multi-layer ARC films on their front surface with calculated thicknesses. Average reflectance (400-1100 nm) of silicon surface by Fresnel equations with triple layer ARC was around 2.72%. Solar cell performances with each ARC structure were compared to evaluate the achieved output of reflectance of investigated thin films. Simulated short circuit current density of solar cells with tri-layer ARC was 39.71 mA/cm 2 , was significantly higher than that of the ARC-free solar cells resulting in an efficiency of 19.1%.
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