Synthesis and Red Emission of Eu3+-DOPED NaLaMo2O8 Phosphors

Eu 3+ -doped NaLaMo 2 O 8 phosphors were synthesized by a conventional solid-state reaction. The phase and luminescent properties of the synthesized phosphors were investigated in the current work. In NaLaMo 2 O 8 , Eu 3+ ions replace La 3+ ions and form solid compound. This substitution induces the 2θ angles of diffraction peaks to shift to larger values. Under excitation at 395 nm, NaLaMo 2 O 8 :Eu 3+ phosphors exhibit emission bands in the range of 550–725 nm originating from 5 D 0 → 7 F J transitions (J = 0, 1, 2, 3, 4) of Eu 3+ . The strongest emission band corresponds to the 5 D 0 → 7 F 2 transition, which indicates a site of Eu 3+ without inversion symmetry in NaLaMo 2 O 8 . The Eu 3+ concentration has obvious influence on the luminescent properties of NaLaMo 2 O 8 :Eu 3+ phosphors. NaLaMo 2 O 8 :6 mol%Eu 3+ has the strongest excitation and emission intensities.