ChemInform Abstract: Synthesis and Photoluminescence Properties of Microcrystalline Sr₂ZnWO₆:RE³⁺ (RE: Eu, Dy, Sm and Pr) Phosphors.

Abstract

RE: Eu, Dy, Sm and Pr) Phosphors. -Microcrystalline Sr 2ZnWO6:Ln 3+ (Ln: Eu, Dy, Sm, Pr) phosphors are prepared by solid state reaction of stoichiometric mixtures of SrCO 3, ZnO, H2WO4, and Ln2O3 in air (1250 C, 4 h). The Eu 3+ and Dy 3+ -doped phosphors show intense red (616 nm) and yellow (574 nm) emissions, resp., indicating that the rare earth ions are substituted at non-centrosymmetric sites of the host lattice. Near white (Dy 3+ ) and reddish-orange (Sm 3+ ) emissions show strong host absorption and energy transfer from the host to the dopant. The Pr 3+ -doped phosphor shows a series of emission peaks in the visible region with the most intense in the blue region at 491 and 499 nm. -(DABRE, K. V.; PARK, K.; DHOBLE*, S. J.; J. Alloys Compd. 617 (2014) 129-134, http://dx.

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