title: White- and blue-light-emitting dysprosium(III) and terbium(III)-doped gadolinium titanate phosphors.
abstract: Here we report the synthesis and structural, morphological, and photoluminescence analysis of white- and blue-light-emitting Dy3+- and Tm3+-doped Gd2Ti2O7nanophosphors. Single-phase cubic Gd2Ti2O7nanopowders consist of compact, dense aggregates of nanoparticles with an average size of ~25 nm for Dy3+-doped and ~50 nm for Tm3+-doped samples. The photoluminescence results indicated that ultraviolet (UV) light excitation of the Dy3+-doped sample resulted in direct generation of white light, while a dominant yellow emission was obtained under blue-light excitation. Intense blue light was obtained for Tm3+-doped Gd2Ti2O7under UV excitation suggesting that this material could be used as a blue phosphor.
authors.affiliation: Department of Chemical and Materials Engineering, University of Alberta, Edmonton, T6G 2V4, Canada.
authors.forename: Ž
authors.initials: Ž
authors.lastname: Antić
authors.affiliation: Vinča Institute of Nuclear Sciences, University of Belgrade, P.O. Box 522, 11001, Belgrade, Serbia.
authors.forename: S
authors.initials: S
authors.lastname: Kuzman
authors.affiliation: Vinča Institute of Nuclear Sciences, University of Belgrade, P.O. Box 522, 11001, Belgrade, Serbia.
authors.forename: V
authors.initials: V
authors.lastname: Đorđević
authors.affiliation: Vinča Institute of Nuclear Sciences, University of Belgrade, P.O. Box 522, 11001, Belgrade, Serbia.
authors.forename: M D
authors.initials: MD
authors.lastname: Dramićanin
authors.affiliation: Department of Chemical and Materials Engineering, University of Alberta, Edmonton, T6G 2V4, Canada.
authors.forename: T
authors.initials: T
authors.lastname: Thundat
mesh_terms: D004419:Dysprosium / Q000737:chemistry*; D005682:Gadolinium / Q000737:chemistry*; D049408:Luminescent Agents / Q000138:chemical synthesis / Q000737:chemistry*; D008163:Luminescent Measurements; D046529:Microscopy, Electron, Transmission; D013725:Terbium / Q000737:chemistry*; D014466:Ultraviolet Rays
chemical_list: D049408:Luminescent Agents; D013725:Terbium; D004419:Dysprosium; D005682:Gadolinium
keywords: Dy3+; Tm3+; phosphor; photoluminescence; pyrochlores