Structural and Luminescence Properties of Sm3+ Doped TTB -Type BaTa2O6 Ceramic Phosphors


EKMEKÇİ M. K. , Ilhan M., BAŞAK A. S. , DENİZ S.

JOURNAL OF FLUORESCENCE, cilt.25, ss.1757-1762, 2015 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 25 Konu: 6
  • Basım Tarihi: 2015
  • Doi Numarası: 10.1007/s10895-015-1663-5
  • Dergi Adı: JOURNAL OF FLUORESCENCE
  • Sayfa Sayıları: ss.1757-1762

Özet

Pure and 0.5 to 10 mole% Sm3+ doped TTB (tetragonal tungsten bronze)-type BaTa2O6 ceramic phosphor was produced by the solid state reaction method which performed at 1425 A degrees C for 20 h. XRD and SEM analysis indicated single TTB phase for undoped and 0.5 to 10 mole% Sm3+ doped BaTa2O6 structures. SEM also showed that the BaTa2O6 grain size decreased with the increasing content of Sm3+. Optical analysis indicated significant emissions in the visible spectral region as green (lambda = 562.7 nm) and orange-reddish (lambda = 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.