Luminescence Properties of Rare Earth-Doped Cubic Double Perovskite Tungstate Ba2(1-x)(Na,RE)xZnWO6 (RE = Ce3+, Eu3+ and Dy3+) Phosphors

Herein, the photoluminescence (PL) and thermoluminescence (TL) properties of rare earth doped cubic double perovskite tungstate Ba2(1-x)(Na,RE)(x)ZnWO6 (RE = Ce3+, Eu3+ and Dy3+) phosphors synthesized by the solid-state reaction method are presented. The self-luminescence of pure Ba2ZnWO6 material in the blue-green region is enhanced by Ce3+ doping with its most effective concentration of 3 mol%. The dominant emission in orange (of Eu3+ at 597 nm) and blue (of Dy3+ at 485 nm) region in the emission spectra of Ba2(1- x)(Na,Eu)(x)ZnWO6 and Ba2(1-x)(Na,Dy)(x)ZnWO6 phosphor, respectively, shows highest intensity for 3 mol% of Eu3+ and 2 mol% of Dy3+ ion in the host lattice. The broad excitation band of Ce3+ and Dy3+ doped phosphor in the near UV region claims its candidature for solid-state lighting. TL studies are also performed using.-radiation. Pure host material shows a simple glow curve while the rare earth ion doped phosphor shows a complex glow curve with enhanced intensity. Phosphor shows the fairly linear response up to 1 kGy radiation. Glow curves are deconvoluted and the trap parameters are calculated by Chen's peak shape method.