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In this work, Eu3+-doped barium sodium borate oxide and oxyfluoride glasses were fabricated by melt-quenching technique for investigated their physical, optical, photoluminescence and radiative properties. The emission spectra, observed under the 394 nm, show the emission band corresponding to the transitions of 5D0→7F1 (590 nm), 7F2 (613 nm), 7F3 (652 nm) and 7F4 (701 nm). The most intense emission band is the 5D0→7F2 transition at 613 nm. The emission light is shown the reddish-orange color according to the framework of CIE 1931 color space. The Judd-Ofelt analysis confirmed the potential for using the glass samples in this work for use as photonic applications. The results from the emission spectra and radiative properties show that the oxyfluoride glass sample has more lasing potential than the oxide glass sample. [ABSTRACT FROM AUTHOR]

The glass samples (35-x)B2O3:35SiO2:12Na2O:7.9CaO:0.1Sb2O3:10BaO:xCr2O3 with a variation of Cr2O3 content were successfully fabricated and characterized for solid-state lighting material applications. The results showed the most suitable composition within the range of study at 0.02 mol% of Cr2O3. This composition gave higher reflection loss (RL), lower oxide polarizability, and lower molar refractivity. The Commission International de I'Eclairage (CIE) chromaticity coordinates confirmed a strong orange color emission. Hence, this suggests that the 0.02 mol% Cr2O3 glass is a good candidate and cost-effective for orange-emitting solid-state lighting material applications. This study will be a useful literature source for further development in this field. [ABSTRACT FROM AUTHOR]

In this work, Sm3+-doped Ba-Na-B glasses with the varying of Gd3+ concentration from 0 to 10 mol% were prepared by melt-quenching technique. The absorption spectra show the highest peak at 402 nm (in UV-Vis region) and at 1227 nm (in NIR region). The emission spectra, excited by 402 nm excitation wavelength, show the emission peaks centered at 563, 600, 646 and 706 nm. The glass sample with 2.5 mol% of Gd3+ ions show the highest light yield. The emission spectra, excited by 275 nm for investigation of Gd3+ to Sm3+ energy transfer, also highest emission peaks observed at 311 and 622 nm for Gd3+ ions. The emission peaks observed at 563, 600, 646 and 706 nm for Sm3+ ions. The glass sample with 7.5 mol% of Gd3+ ions show the highest light yield because of the better energy transfer from Gd3+ to Sm3+ ions. The color of the emission from these glass samples are located in orange emission region when excited with 402 nm and located in reddish-orange emission region when excited with 275 nm. [ABSTRACT FROM AUTHOR]

In this research, the samarium doped barium sodium borate oxide and oxyfluoride glasses were prepared by melt-quenching technique. The density, molar volume, refractive index, absorption spectra, photoluminescence spectra (excitation spectra, emission spectra) and luminescence decay time of the glass samples were investigated. The absorption spectra, studied in the UV-Vis-NIR region, show the highest peak centered at 400 nm (6H5/2→6P3/2) in UV-Vis region and at 1227 nm (6H5/2→6F7/2) in NIR region. The emission spectra, excited by 400 nm excitation wavelength, show the emission peak centered at 562 nm (4G5/2→6H5/2), 600 nm (4G5/2→6H7/2), 646 nm (4G5/2→6H9/2) and 706 nm (4G5/2→6H11/2). The highest emission peak is the peak centered at 600 nm, corresponding to the 4G5/2→6H7/2 transition. The result show that the emission intensity of the oxyfluoride glass sample is higher than the oxide glass sample because the oxyfluoride glass owns less non-radiative transitions than the oxide glass. [ABSTRACT FROM AUTHOR]