Optimization and Comparison of Al0.2Ga0.8As and Ga0.51In0.49P Window Layers for Single-Junction GaAs Solar Cell Using PC1D Simulation

Window layer plays a crucial role in enhancing solar cells efficiency. GaAs-based solar cells are widely recognized for their high efficiencies. This high performance can be attributed to the availability of various materials suitable for window layers. Numerical simulation can be used to identify the best among those materials. The aim of this work is to optimize and then compare two well-known window layer materials for GaAs-based solar cells: Al0.2Ga0.8As and Ga0.51In0.49P, using PC1D simulation. The simulation results indicate that Ga0.51In0.49P is more suitable for GaAs-based solar cells, demonstrating a higher open-circuit voltage, higher fill factor, and higher maximal power output. These better results are due to superior optical properties of Ga0.51In0.49P.