Material parameter models and simulations of III-Sb solar cells based on AlGaAsSb, AlInAsSb and GaInAsSb quaternary alloys

III-Sb alloys are being increasingly investigated for use in multijunction and narrow-bandgap solar cells. However, a comprehensive understanding of the properties of these alloys is essential to fully assess their potential for photovoltaic applications. In this work, a complete material library, fed by experimental data, is developed. The procedures for determining key material parameters are detailed. The library enables realistic simulations of GaSb-based solar cells incorporating active layers such as AlGaAsSb, AlInAsSb and GaInAsSb. The performance metrics are compared with those of conventional photovoltaic materials.