Structural and Luminescence Studies of Sm3+ Doped Telluro-Fluoroborate Glasses for Photonic Applications

Abstract

A new series of Sm₃₊ ions doped telluro-fluoroborate (xSTFB) glasses have been prepared following melt quenching technique and the structural and luminescence behaviors were studied by recording X-ray diffraction, FTIR, absorption and photoluminescence spectral measurements. The amorphous nature of the glasses was confirmed through XRD pattern and the different vibrational bonds of borate and tellurite networks were identified through FTIR spectra. The bonding parameters (b, δ) and Judd-Ofelt intensity parameters (W^l) have been calculated from the absorption spectra in order to explore the bonding nature of the ligand environment around Sm₃₊ ions. The luminescence spectra exhibit four emission bands in the visible region due to the ₄G^5/2→₆H^5/2, ₆H^7/2, ₆H^9/2 and ₆H^11/2 transitions and the same are characterized through CIE 1931 chromaticity diagram. The radiative parameters such as transition probability (A), stimulated emission cross-section (σ^e), branching ratios (β^R) and radiative lifetime (τ^R) have been determined to elucidate the suitability of the studied glasses for the fabrication of various photonic devices.