A Mesoscopic Lattice Model for Morphology Formation in Ternary Mixtures with Evaporation

• DOI: 10.48550/arxiv.2106.01427
• Publication Date: 2021-01-01
• Authors: Mario Setta; Vì C. E. Kronberg; Stela Andrea Muntean; Ellen Moons; Jan van Stam; Emilio N. M. Cirillo; Matteo Colangeli; Adrian Muntean
• Keywords: Mesoscopic physics; Square lattice; Lattice (music); Pattern Formation; Length scale; Lattice model (finance)

We develop a mesoscopic lattice model to study the morphology formation in interacting ternary mixtures with evaporation of one component. As concrete application our model, we wish capture morphologies as they are typically arising during fabrication organic solar cells. In this context, consider an evaporating solvent into which two other components dissolved, for 2-component coating solution that is drying on substrate. propose 3-spins dynamics describe evolution three species. main tool, use Monte Carlo Metropolis-based algorithm, possibility varying system's temperature, mixture composition, interaction strengths, and kinetics. The novelty structure -- bi-dimensional periodic boundary conditions divided square cells encode range among units. investigate effect parameters resulting morphologies. Finally, compare results obtained corresponding ones based analogous short units, i.e. when length scale coincides microscopic lattice.