Simulation study of TiO₂ single layer anti-reflection coating for GaAs solar cell

Anti-reflection coating (ARC) plays an important role in reducing the reflection of incident light and absorbing more photons to produce more photoelectrons. In this paper, a single-layer TiO₂ anti-reflection coating is performed on GaAs solar cells. In the simulation study, we compared the solar cell before and after ARC by using PC1D simulation software. The I-V characteristics, reflectance, and external quantum efficiency have been simulated with a refractive index of 2.324 at 600 nm wavelength. The simulated results show that the ARC-coated solar cell performs better. It is found that the power conversion efficiency of 24.75% reflection is 9.5%, and the EQE is 95% at the 62 nm thickness of the ARC layer. The optimized reflectivity was found to be around 5%, which is quite lower than that without ARC (32%).