Preparation And Luminescent Properties Of Sr₂MgSi₂O₇: Re (Re=Eu²⁺, Dy³⁺) And Sr₂CaMoO₆: Eu³⁺

The luminescent properties of phosphors are highly significant in studies of PDPs (Plasma Display Panels) and Mercury-free fluorescent lamps.To exploit new fungible materials of better performance, the possibility of Sr₂MgSi₂O₇: Re (Re = Eu²⁺, Dy³⁺) as new red, green, blue and full-color Vacuum Ultraviolet (VUV) phosphors was explored. The single phase of Sr₂MgSi₂O₇ samples was prepared by precipitation synthesis and then doped with Eu²⁺ or Dy³⁺. The phase and luminescent properties of the doped particles were analyzed by the techniques of X-ray Diffraction (XRD) and the spectra of excitation and emission, respectively. Furthermore, Scanning electron microscopy (SEM) was utilized to illustrate the shape and size of the particles which shows best emission intensity and thermal stability. The blue-emitting Sr₂MgSi₂O₇: Eu²⁺ was compared with commercial BaMgAl₁₀O₁₇: Eu²⁺ in the aspects of emission intensity and thermal stability in the investigation, and some efforts have been made in ameliorating the color purity of the white-emitting Sr₂MgSi₂O₇: Dy³⁺.In addition, the new molybdate Sr₂CaMoO₆: Eu³⁺ was synthesized by simple solid state reaction. Some abecedarian studies that contain the luminescent properties of the Sr₂CaMoO₆: Eu³⁺sample in Ultraviolet (UV) and VUV region have been carried out.