Crystal structure and fluoride-ion conductivity of strontium cerium fluoride epitaxial films prepared by topochemical fluorination

Abstract

Topochemical fluorination of perovskite SrCeO3 epitaxial thin films using polyvinylidene difluoride was performed at different annealing temperatures (Tf) for 1 h. Fluorite Sr0.5Ce0.5F2.5 epitaxial thin films were obtained at Tf > 350 °C, which exhibited fluoride-ion conductivity with an activation energy of 0.61 eV.