Synthesis, Thermal Stability, and Emission Properties of Eu2O3 and Tm2O3 Doped Halide Phosphate Glasses Based on the P2O5–ZnO–BaF2–LiCl–CdO System

The PZBLC glass system, with the molar composition 40P2O5–30ZnO–10BaF2–18LiCl–2.0CdO (mol%), was fabricated and subsequently doped with Eu2O3 and Tm2O3 using a melt-quenching technique. The thermal stability (ΔT), glass transition temperature (Tg), and linear refractive indices of the fabricated glass were evaluated. The spectroscopic parameters Ω2, Ω4, and Ω6, and the measured visible and near-infrared photoluminescence at the excitation wavelength depend on the type of rare-earth ions in the doped glasses and were estimated. The lifetimes of the relevant transition levels and the gain bandwidths (σem × Δλeff) of the fabricated glasses were evaluated. The PZBLC–Eu3+ glass, excited at 395 nm, exhibits an intense, high-purity red emission, whereas the PZBLC–Tm3+ glass, excited at 357 nm, shows a strong blue emission. The fabricated glasses are promising candidates as a solid source for visible-light emission with a high emission cross-section prepared by a low-cost technique.