title: Structural and Luminescence Properties of Sm(3+) Doped TTB -Type BaTa2O6 Ceramic Phosphors.
abstract: Pure and 0.5 to 10 mole% Sm(3+) doped TTB (tetragonal tungsten bronze)-type BaTa2O6 ceramic phosphor was produced by the solid state reaction method which performed at 1425 °C for 20 h. XRD and SEM analysis indicated single TTB phase for undoped and 0.5 to 10 mole% Sm(3+) doped BaTa2O6 structures. SEM also showed that the BaTa2O6 grain size decreased with the increasing content of Sm(3+). Optical analysis indicated significant emissions in the visible spectral region as green (λ = 562.7 nm) and orange-reddish (λ = 597.1 nm). The emission intensity increased with the increasing doping concentration up to 2.5 mole%, and then decreased due to the concentration quenching effect.
authors.affiliation: Art and Science Faculty, Marmara University, Kadıköy, 34722, Istanbul, Turkey. mekmekci@marmara.edu.tr.
authors.forename: Mete Kaan
authors.initials: MK
authors.lastname: Ekmekçi
authors.affiliation: Faculty of Engineering, Marmara University, Kadıköy, 34722, Istanbul, Turkey.
authors.forename: Mustafa
authors.initials: M
authors.lastname: İlhan
authors.affiliation: Art and Science Faculty, Marmara University, Kadıköy, 34722, Istanbul, Turkey.
authors.forename: Ali Sadi
authors.initials: AS
authors.lastname: Başak
authors.affiliation: Faculty of Technology, Marmara University, Kadıköy, 34722, Istanbul, Turkey.
authors.forename: Sabahattin
authors.initials: S
authors.lastname: Deniz
keywords: Photoluminescence; Solid state reaction; TTB-type BaTa2O6