Abstract
A series of Sm3+ and Gd3+-co-doped lead borate glasses having composition 65B2O3–(35–2x)PbO–xSm2O3–xGd2O3 (where x = 0.5, 1.0, 1.5, 2.0 and 2.5 mol%) was prepared through melt quenching technique. Physical, structural and optical properties were investigated and analyzed. Amorphous nature of the prepared samples was confirmed by X-ray diffraction (XRD) spectra. Fourier Transform Infrared (FTIR) spectra revealed incorporation of Pb in borate glass network which signifies structural changes. UV–Visible absorption spectra consisted of several absorption peaks corresponding to the 4f–4f transitions of Sm3+ luminescent center from 6H5/2 ground state to various excited energy levels. Optical bandgap of the prepared glass samples evaluated using Tauc’s method had also been supported by newly developed derivation of absorption spectrum fitting (DASF) method. Photoluminescence emission spectra of the prepared glass samples exhibited wide emission in visible band of Sm3+ ions and characteristic prominent peak (4G5/2–6H7/2) at about 597 nm under ultraviolet excitation. Energy transfer mechanism from Gd3+ to Sm3+ and the process of energy down conversion witnessed in prepared glass samples indicated the potential use of rare earth-co-doped lead borate glass in high-energy radiation sensing and laser applications.
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Singh, D., Singh, S., Singh, T. et al. Samarium and gadolinium-co-doped lead borate glasses for luminescent applications. J Mater Sci: Mater Electron 32, 6900–6911 (2021). https://doi.org/10.1007/s10854-021-05396-6
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DOI: https://doi.org/10.1007/s10854-021-05396-6