Semi-analytical technique for the design of passive daytime radiative cooling coating

Abstract

Analytical techniques such as Kubelka Munk theory, four flux theory, diffusion theory, Monte Carlo simulation technique are used to calculate radiative properties of the disordered coatings for various applications. These techniques deviate significantly from exact numerical solver when particles are in dependent scattering regime and/or when matrix absorption is high. To overcome this, we have proposed a semi-analytical technique to calculate the optical properties of disordered coatings over the entire wavelength range from visible to IR. In this work, we have shown the applicability of semi-analytical technique to model the radiative properties of monodisperse and polydisperse coating for passive daytime radiative cooling. We have used TiO2/PDMS for monodisperse and TiO2/ZrO2/PDMS for polydisperse coating.