Structure, stability, and photoluminescence in the anti-perovskites Na3W1−xMoxO4F (0≤x≤1)

Sullivan, E; Avdeev, M; Blom, DA; Gahrs, CJ; Green, RL; Hamaker, CG; Vogt, T

Structure, stability, and photoluminescence in the anti-perovskites Na3W1−xMoxO4F (0≤x≤1)

Date

2015-10-01

Authors

Publisher

Elsevier

Abstract

Single-phase ordered oxyfluorides Na3WO4F, Na3MoO4F and their mixed members Na3W1−xMoxO4F can be prepared via facile solid state reaction of Na2MO4·2H2O (M=W, Mo) and NaF. Phases produced from incongruent melts are metastable, but lower temperatures allow for a facile one-step synthesis. In polycrystalline samples of Na3W1−xMoxO4F, the presence of Mo stabilizes the structure against decomposition to spinel phases. Photoluminescence studies show that upon excitation with λ=254 nm and λ=365 nm, Na3WO4F and Na3MoO4F exhibit broad emission maxima centered around 485 nm. These materials constitute new members of the family of self-activating ordered oxyfluoride phosphors with anti-perovskite structures which are amenable to doping with emitters such as Eu3+. © 2015 Elsevier Inc.

Keywords

X-ray diffraction, Neutron diffraction, Oxyfluorides, Monocrystals, Optical properties, Cubic lattices

Citation

Sullivan, E., Avdeev, M., Blom, D. A., Gahrs, C. J., Green, R. L., Hamaker, C. G., & Vogt, T. (2015). Structure, stability, and photoluminescence in the anti-perovskites Na3W1−xMoxO4F (0≤x≤1). Journal of Solid State Chemistry, 230, 279-286, doi:10.1016/j.jssc.2015.07.018