Synthesis and photoluminescence properties of blue-emitting Sr3La2(PO4)2(SiO4)O: Eu2+ phosphors

Abstract A series of Sr3La2(PO4)2(SiO4)O: Eu2+ phosphors were synthesized by conventional high-temperature solid-state reaction. The phase formation was confirmed by XRD analysis. The photoluminescence properties of Sr3La2(PO4)2(SiO4)O: Eu2+ phosphors were investigated systematically. The phosphors exhibit absorption in the ultraviolet–visible spectral region of 280–420 ​nm and show an intense asymmetric broadband blue emission peaking at 454 ​nm under the excitation at 365 ​nm. The concentration quenching mechanism, decay property, and thermal stability have been discussed in detail. The investigation results indicate that Sr3La2(PO4)2(SiO4)O: Eu2+ will have applications as the blue component in tricolor near-ultraviolet pumped white light-emitting diodes.