Disaccharide assisted LaAlO3:Ce3+ perovskite: structural and optical studies suitable for display devices

Abstract Sucrose mediated LaAlO3: Ce3+ nanopowders were prepared by propellant chemistry technique. The preliminary characterizations were carried out using Powder X-Ray Diffraction (PXRD), Fourier Transform InfraRed spectra (FTIR), Scanning Electron Microscopy (SEM) and transmission electron microscopy (TEM) to analyse the structure and morphology of the prepared nanophosphors. PXRD studies showed pure rhombohedral single phase with average crystallite size of the order of 45-62 nm. SEM micrographs confirmed nanoparticles formation and the crystallite size agrees well with the TEM image. The optical band gap of LaAlO3: Ce3+ (1-2 mol%) nanophosphors was found to be in the range 4.5-4.93 eV. PL spectra showed broad intense band at 449 nm and 541 nm up on 330 nm excitation. Chromaticity studies exhibit the blue green color emission of the prepared phosphors. The intensity and color of Ce3+ doped LaAlO3 nanophosphors confirm that these phosphors can be a potential material for display and optical devices.