Synthesis of Sm3+ and Dy3+ doped LaBWO6 for evaluation as potential materials in luminescent display applications

A series of Sm³⁺ and Dy³⁺ doped LaBWO₆ phosphors were synthesized by high temperature solid state reaction. Recorded XRD patterns proved that the titled compound in a single phase has been obtained. Sm³⁺ and Dy³⁺ doped LaBWO₆ could emit orange and white light, respectively. The optimal doping concentration of Sm³⁺ or Dy³⁺ was experimentally ascertained to be 6 mol%. The critical distance of energy transfer for Sm³⁺ or Dy³⁺ doped sample is 1.540 nm. In addition, there is no cross energy transfer between the Sm³⁺ and Dy³⁺ ions in the co-doped samples. The results indicated that the electric dipole–dipole interaction is predominant energy transfer mechanism for concentration quenching of Sm³⁺ or Dy³⁺ doped LaBWO₆ phosphor. The charge transfer band was observed in the excitation spectra of Sm³⁺ or Dy³⁺ doped LaBWO₆ phosphors. Present investigation indicated that Sm³⁺ and Dy³⁺ doped LaBWO₆ can be applied in solid state lighting and LaBWO₆ is a promising host for display applications.