Structural and Luminescence Properties of Sm(3+) Doped TTB -Type BaTa2O6 Ceramic Phosphors.

Abstract

Pure and 0.5 to 10mole% 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 20h. XRD and SEM analysis indicated single TTB phase for undoped and 0.5 to 10mole% 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 = 562.7nm) and orange-reddish (λ = 597.1nm). The emission intensity increased with the increasing doping concentration up to 2.5mole%, and then decreased due to the concentration quenching effect.