LiSr3SiO4Cl3-A novel host lattice for Eu2+-activated luminescent materials

Eu2+-activated LiSr3SiO4Cl3 phosphors were successfully designed, and prepared at low calcination temperature (650 °C). The crystal structure, morphology, and photoluminescence properties have been investigated in detail. The LiSr3SiO4Cl3 crystallizes in orthorhombic LiEu3SiO4Cl3-type structure. Under 316 nm excitation, the phosphor exhibits an asymmetric emission band peaking at 495 nm, which is probably attributed to the 4f-5d transitions of Eu2+ in various crystallographic sites. Their luminescence properties are investigated as a function of activator concentration (Eu2+). The quenching concentration of Eu2+ in LiEu3SiO4Cl3 is about 0.01 due to dipole-dipole interaction. The investigation indicates that Eu2+-activated LiEu3SiO4Cl3 phosphor can be used as a green emitting phosphor for white LEDs.