Substrate-Dependent Optical Blue-Shift upon F Incorporation in Oxyfluoride SrCo(O,F)_3-<i>x</i> Films.

ABSTRACT: Heteroanionic oxides are attractive for their structural versatility and property tunability. In this work, we report on optoelectronic properties in epitaxial oxyfluoride SrCo(O,F)_3-x films synthesized on multiple (001)-oriented perovskite substrates. Topochemical fluorination was conducted on the as-grown SrCoO_2.5 films at 200 °C using vapor from poly(vinylidene fluoride) (PVDF) as the fluoride source, producing films with a nominal SrCoO_2.2F_0.6 composition. Uniform fluoride insertion in each film was confirmed via depth-dependent elemental analysis, performed with X-ray photoelectron spectroscopy (XPS). Fluoride incorporation results in an expansion of the c-axis parameter, an increase in resistivity, and a blue-shift of the opti

SUBMITTER: Tucker TD 

PROVIDER: S-EPMC11898045 | biostudies-literature | 2025 Mar

REPOSITORIES: biostudies-literature