Multifunctional character of revived double perovskite for device applications

Abstract

The materials having multifunctional behavior are in the form of single crystal or poly crystalline. The present reports belong to polycrystalline samples of lead reducing double perovskite vanadates of Pb2-xSrxBiVO6 (0.5 ≤ x ≤ 1.5) oxide ceramics. To synthesize the present samples cost effective solid solution casting technique has been adopted. Their formation, density, phase identification as well as purity were verified through X-ray diffraction (XRD), Scanning Electron Microscope (SEM), Fourier transmission Infra-red (FTIR) and RAMAN spectroscopy. The optical properties of the materials have been investigated by utilizing room temperature UV–Vis and photo luminescence (PL) spectroscopic analysis. It is observed the band gap of the materials were found to be in the range of 2.68–2.23eV from UV–Vis study which suggest materials can be useful for photo catalytic devices whereas PL emission spectra confirms they are may be useful as blue white LED devices. Presence of ferroelectricity in the materials was confirmed from dielectric as well as polarization study which allows their utility for multi-layer capacitor and memory devices. Transport and leakage characteristics of the materials were studied from loss tangent, impedance spectroscopy as well as modulus spectroscopy recorded at different conditions of frequency and temperature which may be useful for microelectronics.