Na+ induced electric-dipole dominated transition (5D0→7F2) of Eu3+ emission in AMgPO4:Eu3+ (A=Li+, Na+, K+) phosphors

Abstract A series of Eu 3+ doped (AMgPO 4 ) 1.00− x :Eu 3+ x (A=Li + , Na + , K + ) phosphors were prepared by the solid-state method. XRD results confirm that the samples contain mixture phases of crystals. Cation effect of Li + , Na + , K + on the PL properties of (AMgPO 4 ) 1.00− x :Eu 3+ x phosphors is discussed. The results indicated that among the three cations, Na + not only provides the most intensity of Eu 3+ emission, but also produces electric-dipole dominated transition ( 5 D 0 → 7 F 2 ) and results to obtain the most red color. The optimized molar concentrations of Eu 3+ for the three kinds of samples are 6, 8, 10%, which (NaMgPO 4 ) 0.92 :Eu 3+ 0.08 is a potential candidate as the red-emitting phosphor for UV-based white LED.