Abstract The performance of multijunction PV devices, such as two-terminal perovskite/silicon cells, is strongly influenced by spectral irradiance distributions, as current matching among sub-cells is highly sensitive to spectral variations. In desert regions, the increasing frequency of dust and sandstorms may significantly alter the spectral distribution of solar irradiance and thus can adversely affect PV module performance. In this work, we present an experimental investigation of the distri