Rapid synthesis and luminescence properties of Sr3SiO5:Eu2+ phosphors

Sr3SiO5:Eu2+ phosphors were synthesized rapidly through a microwave sintering method with the presence of activated carbon powder. The detailed composition and morphology were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The influences of sintering time, fluxing agent (BaF2) content and rare earth ion doping concentration on its photoluminescence (PL) properties were also investigated. It was clear in PL spectra that a broad emission band peaking at 570nm was obtained in as-prepared phosphors under a blue light excitation. Meanwhile, non-radiative transitions between Eu2+ ions in the Sr3SiO5 host had also been demonstrated to be attributable to dipole–dipole interactions, and the critical distance calculated by the quenching concentration was estimated to be 10.56 A. The samples were uniform in diameter and regular in morphology. In other words, the Sr3SiO5:Eu2+ phosphors possessed a potential application for white light emitting diodes (LEDs).