Optical properties investigation of Sr2CaFe2WO9 triple perovskite for optoelectronic applications

Abstract

In this manuscript, Sr2CaFe2WO9 triple perovskite, in a powder state, has been studied in the context of these linear and nonlinear optical properties. This material was developed as a powder with a polycrystalline structure by a solid-state reaction. These optical properties were measured from transmittance and absorbance for wavelengths between 250 and 850 nm, using a UV-Visible spectroscopy at room temperature. The analysis of the optical results showed the possibility of using Sr2CaFe2WO9 in optoelectronic technology due to its optical properties suitable for this field. The transmittance and absorbance, absorption coefficient, band gap (Eg), Urbach energy, refractive index, optical conductivity, and dielectric function were investigated. The gap energy of the sample determined by the Tauc method is 3.06 eV, while the derivation of the absorption spectrum fitting (DASF) method showed that the studied material has a direct bandgap. The first and third-order nonlinear susceptibilities, as well as the static and nonlinear refractive indices, were also calculated for the studied powder. Sr2CaFe2WO9 can be exploited as a promising material for upgraded applications in optoelectronic applications, given its optical properties either linear or nonlinear.