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

We report the optical absorption, photoluminescence and fluorescence decay properties of Tb3+-doped sodium fluoro-borate (SFB) glasses. Different concentrations of Tb3+-doped SFB glasses were prepared by conventional melt quenching technique using a chemical composition (in mol%) 25Na2O–5LaF3–10CaF2–10AlF3–(50−x) B2O3−x TbF3 (0.01≤x≥4). The Judd-Ofelt model has been adopted to determine the radiative parameters of the 5D4→7F6–3 emission transitions. The effect of Tb3+ ion concentration on the emission from the 5D3,4 excited levels is discussed in detail. The analysis of optimization of Tb3+ ion concentration for efficient green color display devises is reported. The resonance energy transfer mechanism responsible for non-radiative decay rates is clearly explored.