Optical, emission, and excitation dynamics of Eu 3+ doped bismuth-based phosphate glasses for visible display laser applications.

Eu 3+ doped-bismuth-based phosphate glasses with chemical equation (60-x) P 2 O 5 -20Bi 2 O 3 -10 Na 2 CO 3 -10SrF 2 -xEu 2 O 3 (PBNSEu), (x = 0, 0.1, 0.5, 1.0, 1.5 and 2 mol%) were fabricated by using the melt quenching method. Obtain XRD, EDAX, and FT-IR spectrum to characterize the structure of the prepared PBNSEu glasses. The J-O (Judd-Ofelt) intensity parameters (Ω 2 , Ω 4 ) were estimated using photoluminescence emission spectra. When the excited with a xenon lamp at λ exc = 394 nm, the most intense red emission transition occurs at ~612 nm ( 5 D 0 → 7 F 2 ). Using the J-O intensity parameters to calculate the radiative properties whereas the radiative branching ratio (β R ), radiative transition probability (A R ), the radiative lifetime (τ R ), and total radiative transition rate (A τ ) were calculated for the transitions 5 D 0 → 7 F J (J = 0-4) were obtained in the emission spectra and doped with europium ions in the current glasses. Using the CIE1931 chromaticity coordinate axis, to identify the colours of various concentrations of Eu 3+ ions doped PBNS glasses were evaluated by the emission spectra. The temperature-dependent luminescence spectrum was recorded for the optimized PBNSEu20 glass, and calculated the activation energy. The results strongly suggested red components in the w-LEDs, visible display laser applications.