The chemical composition of Pr3+-doped strontium–aluminum–bismuth–borate glasses with different concentrations, that is, (50 – x)B2O3 + 20Bi2O3 + 7AlF3 + 8SrO + 15SrF2 + xPr2(CO3)3 (where x = 0.1, 0.5, 1.0, and 1.5 mol.%), have been prepared by the melt quenching technique. XRD, SEM, and EDS studies reveal the structural and amorphous properties of the prepared glasses. Different borate groups are analyzed by FTIR measurements. Judd–Ofelt (J–O) intensity parameters, Ωλ (λ = 2, 4, and 6) are calculated from the absorption spectrum to identify the nature of Pr3+ ions with their surrounding ligands. Using the J–O parameters, the radiative properties such as radiative transition probabilities AR and radiative lifetimes τcal are evaluated for various excited transitions of Pr3+ ions. Stimulated emission cross sections \( {\sigma}_p^E \) and branching ratios βR for the emission transitions are evaluated by the photoluminescence spectra. The higher values of \( {\sigma}_p^E \) and βR are identified for the emission transitions 3P0 → 3H4 and 1D2 → 3H4 of SABiBPr15 and SABiBPr01 glasses; these glasses are suitable for light emitting materials. The chromaticity color coordinates are calculated to find the average color of the emission spectra.
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Published in Zhurnal Prikladnoi Spektroskopii, Vol. 86, No. 4, pp. 639–646, July–August, 2019.
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Naidu, M.D., Ratnakaram, Y.C. Pr3+-Doped Strontium–Aluminum–Bismuth–Borate Glasses for Laser Applications. J Appl Spectrosc 86, 690–697 (2019). https://doi.org/10.1007/s10812-019-00880-8
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DOI: https://doi.org/10.1007/s10812-019-00880-8