Synthesis and Luminescence Properties of Eu3+ Doped Sr2SiO4 Phosphor

Abstract

The europium doped Sr2SiO4 phosphors were prepared by the combustion synthesis technique. The prepared samples of europium doped Sr2SiO4 phosphors were characterized by the X-Ray Diffraction (XRD), Ultraviolet Visible spectroscopy (UV), Fourier Transform Infrared Spectroscopy (FT-IR), Field Emission Scanning Electron Microscopy (FE-SEM), Energy Dispersive Spectra (EDS) and Photoluminescence Technique (PL). The orthorhombic crystal structure of the prepared sample was confirmed by using XRD. The formation of fiber like nano structured nature was confirmed by the images captured using the FE-SEM technique. The band gap energies were calculated using the UV-Visible spectra of the samples and these band gap energies were observed as 4.5826 eV for Sr2SiO4 and 4.1748 eV for Eu (5 m%) doped Sr2SiO4. The two different PL emission peaks were observed for two different excitation wavelengths. One peak was observed at the 590 nm under 393 nm excitation and another peak was observed at the 615 nm under 408 nm excitation. The CIE color coordinates of the Eu3+ doped Sr2SiO4 phosphors are x ≈ 0.6615, y ≈ 0.3382 (red color) observed for 408 nm excitation and x ≈ 0.5636, y ≈ 0.4356 (orange) observed for 393 nm excitation calculated using the color calculator program radiant imaging.