Synthesis and luminescence properties of red-emitting K2MgSiO4:Eu3+ phosphors

A novel phosphor, K 2 MgSiO 4 :Eu[Formula: see text], was synthesized by a solid-state reaction method. The phase formation was checked by X-ray powder diffraction. The photoluminescence excitation, emission spectra, decay curve and CIE coordinates of samples with different Eu[Formula: see text] ion concentrations were investigated in detail. The excitation spectra show a broad wavelength range of 225–470 nm. The K 2 MgSiO 4 :Eu[Formula: see text] phosphors exhibit highly red emission peaking at about 616 nm which is assigned to the 5 D[Formula: see text]F 2 transition of Eu[Formula: see text]ions under the excitation of near-ultraviolet (NUV) (394 nm) light. The critical quenching concentration of Eu[Formula: see text] doped in the K 2 MgSiO 4 : Eu[Formula: see text] phosphors was about 10 mol.% and the concentration quenching mechanism was dipole–dipole interactions between Eu[Formula: see text] ions. The results indicate that K 2 MgSiO 4 :Eu[Formula: see text] is a potential red phosphor candidate for NUV-pumped white light emitting diodes.