Photoluminescence and decay behavior of Tb3+ ions in sodium fluoro-borate glasses for display devices

Abstract We report the optical absorption, photoluminescence and fluorescence decay properties of Tb 3+ -doped sodium fluoro-borate (SFB) glasses. Different concentrations of Tb 3+ -doped SFB glasses were prepared by conventional melt quenching technique using a chemical composition (in mol%) 25Na 2 O–5LaF 3 –10CaF 2 –10AlF 3 –(50− x ) B 2 O 3 − x TbF 3 (0.01≤ x ≥4). The Judd-Ofelt model has been adopted to determine the radiative parameters of the 5 D 4 → 7 F 6–3 emission transitions. The effect of Tb 3+ ion concentration on the emission from the 5 D 3,4 excited levels is discussed in detail. The analysis of optimization of Tb 3+ ion concentration for efficient green color display devises is reported. The resonance energy transfer mechanism responsible for non-radiative decay rates is clearly explored.