Synthesis and luminescence of Pr3+ doped Lu2MoO6 phosphors

A series of Pr³⁺ doped Lu₂MoO₆ phosphors were synthesized by a solid state reaction. The phase and optical properties of the synthesized phosphors were investigated. The XRD patterns indicate that the synthesized phosphors have a monoclinic structure and the doped Pr³⁺ ions have no influence on the phase structure of Lu₂MoO₆ host. Pr³⁺ doped Lu₂MoO₆ phosphors contain a broad excitation band originating from the O^2- → Mo⁶⁺ charge transfer transitions and several weak excitation bands resulting from ³H₄ → ³P_j (j = 2, 1, 0) transitions of Pr³⁺. Under the excitation at 365 nm, Pr³⁺ doped Lu₂MoO₆ phosphors show emission bands ranging from blue to red region. The emission and decay characteristics of Pr³⁺ doped Lu₂MoO₆ phosphors indicate the energy transfer from Lu₂MoO₆ host to doped Pr³⁺ ions. Lu_1.92Pr_0.08MoO₆ phosphor emits warm white light with the CIE coordinates of (0.352, 0.316) and the CCT value of 4499 K.