Compositional-dependent europium-doped lead phosphate glasses and their spectroscopic properties.

New multicomponent europium-doped lead phosphate based glasses with various PbO:P 2 O 5 molar ratios were prepared and next studied using optical spectroscopy. Based on excitation and luminescence spectra measurements, some spectroscopic parameters like the phonon energy of the glass host and the fluorescence intensity ratio R of the 5 D 0 → 7 F 2 to 5 D 0 → 7 F 1 transition of Eu 3+ ions were determined. Luminescence lifetimes ( τ m ) for the 5 D 0 state of Eu 3+ ions were also evaluated. Optical properties of Eu 3+ ions have been investigated in lead phosphate based systems, in which PbO:P 2 O 5 molar ratio were changed from 1:5 to 5:1 in glass composition. The value of the phonon energy of the host decreases with increasing PbO concentration. In addition, the spectral lines are shifted toward higher wavelengths. Non-monotonic dependence of fluorescence intensity ratio R (Eu 3+ ) upon PbO:P 2 O 5 content has been observed. Influence of PbO:P 2 O 5 molar ratio on spectroscopic parameters for Eu 3+ are presented and discussed. [ABSTRACT FROM AUTHOR]