Combustion Synthesis and Luminescence Properties of Ce3+ Doped Strontium Silicate Phosphors

Abstract

Cerium doped materials attracted the mind of researchers due to characteristic emission in the blue region and near blue region. We have prepared the cerium doped Sr2SiO4 phosphors by using the combustion synthesis. The prepared samples are characterized by the X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive spectra (EDS), ultraviolet visible spectroscopy (UV), Fourier transform infrared spectroscopy (FT- IR) and photoluminescence spectroscopy (PL). From XRD, it is confirmed that the prepared host Sr2SiO4 has orthorhombic crystal structure. The formation of the nano-crystalline nature of the samples has been confirmed by the SEM technique. EDS denotes the presence of the Sr, Si and O ions present in the prepared host and Sr, Si, O and Ce atoms present in the cerium doped nano-phosphors. The band gap energies of the host Sr2SiO4 and Ce3+ doped Sr2SiO4 are observed to be 4.5926 and 3.7126 eV. The formation of the Si-O, Si-Si and Sr-O bonds is confirmed by FT- IR. PL depicts the presence of the Ce3+ in Sr2SiO4 host has shown the emission in the blue region and therefore it is applicable in the blue display devices.