Dy³⁺ doped Lithium Sodium Bismuth Borate Glasses for Yellow Luminescent Photonic Applications

摘要

Lithium sodium bismuth borate glasses-doped with trivalent dysprosium (Dy³⁺) ions (LSBiB) have been prepared by conventional melt-quenching technique and characterized by structural, thermal and spectroscopic measurements. XRD pattern of the host glass confirms its amorphous nature. Morphological and elemental analysis has also been carried out for Dy³⁺doped LSBiB glass matrix. FTIR spectral analysis confirms the glass formation of the host glass. Optical absorption spectral analysis has been carried out for 0.8 mol% Dy³⁺ doped LSBiB glass sample. Well defined optical absorption bands are assigned with corresponding electronic transitions. Photoluminescence spectra shows two prominent emission bands centered at 482 nm and 575 nm corresponds to the ⁴F_9/2 → ⁶H_15/2 and ⁴F_9/2 → ⁶H_13/2 respectively under the excitation of 452 nm. Among all the concentrations of Dy³⁺ ions, at 0.8 mol% Dy³⁺contained glass sample exhibits prominent yellow emission at 575 nm. Lifetime decay dynamics have been systematically analyzed for all the glasses, higher lifetime is found to be 0.47 ms for 0.8 mol% Dy³⁺ ions doped glass. From the photoluminescence analysis, Dy³⁺ contained glass samples could be suggested as potential yellow luminescent glass matrix for several photonic device applications.