A Unified Bandgap Dependent Model for Photovoltaic Performance Analysis

The solar cell current usually depends upon carrier lifetime, diffusion length, diffusion constant, ideality factor etc. This article proposes a model that shows direct dependency of bandgap in the solar cell current equation. Hence this model is more suitable to analyze the efficiency of multi-junction solar cells in terms of corresponding material bandgaps. It also discusses how our developed model satisfies the experimental results for different single junction and multi-junction solar cells having different bandgaps. Different optimization techniques like Gauss Newton Optimization(GNO), Levenberg Marquardt Optimization(LMO), and Differential Evolution Algorithm (DEA) are used for parameter extraction and optimization. Further result analysis is done on the basis of percentage deviation and error comparison of the model with the experimental data. Complete comprehensive study leads to Differential Evolution Algorithm (DEA) as one of the best optimization technique among all with the smallest possible value of error and minimum percentage deviation.