Abstract
Novel oxyfluoride glass having composition 10NaF- (59-x)B2O3- xGd2O3– 30Bi2O3- 1Sm2O3 has been synthesized by melt quenching approach. The amorphous nature of the glass was confirmed by the X-ray diffraction pattern. Raman and infrared spectroscopy confirm the presence of BO3, BO4 and BiO6 units. Photoluminescence studies suggest that the samples are capable of emitting intense light in the reddish-orange region. As Judd-Ofelt parameters follow the Ω4>Ω2>Ω6 trend, with improving asymmetry between Samarium ions and ligands. Additionally, the role of Gd2O3 on the emission spectra of Sm3+ is also witnessed in the X-ray luminescence emission spectra. The decay time measurement of the prepared glass samples is performed to explore the applicability of the samples in lighting devices. Further, the thermal sensing capability was examined by using a luminescence intensity ratio related to the two different electronic transitions. These results proposed that prepared glass can be used for lighting devices, temperature sensing and high-energy scintillators.
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