Spectroscopic properties of Eu³⁺, Dy³⁺ and Tb³⁺ ions in lead silicate glasses obtained by the conventional high-temperature melt-quenching technique

The luminescence properties of selected rare-earth ions in lead silicate glasses have been studied. Europium, dysprosium and terbium ions were chosen as active dopants. Based on excitation and emission measurements as well as luminescence decay analysis, some spectroscopic parameters for these lanthanide ions were determined. In particular, the intensity ratios R/O (Eu³⁺), Y/B (Dy³⁺) and G/B (Tb³⁺) were calculated. Luminescence lifetimes for the ⁵D₀ state of Eu³⁺ ions, the ⁴F_9/2 state of Dy³⁺ ions and the ⁵D₄ state of Tb³⁺ ions were also determined. (paper)