Influence of Sm3+ ion concentration on the photoluminescence behavior of antimony lead oxy fluoro borate glasses

ABSTRACT The synthesis and characterization of a new glass series with the chemical composition 70B2O3–20PbO-5Sb2O3–(5-X) NaF-XSm2O3 where X is 0.1, 0.5, 1.0, 1.5, 2.0 and 2.5 were discussed in detailed in this paper. The glasses were made by using the traditional melt quenching process, and their spectroscopic behavior were studied to understand their utility in the development of lasers, light-emitting diodes (LEDs) and optical devices. Fourier-Transform Infrared (FT-IR) spectroscopy and EDX studies have been conducted to identify the functional groups and elemental composition present in the as prepared undoped glass. Optical and luminescent behaviors of the as prepared glasses were studies using absorption, photoluminescence (PL) excitation, PL emission and PL decay spectral features. The strengths of absorption bands called oscillator strength were calculated by using absorption spectral data and subsequently subjected to Judd-Ofelt (J-O) analysis to estimation various radiative properties like radiative transition probability (AR), total radiative transition probabilities (AT), branching Ratios (βR) and the radiative lifetimes (τR) for the prominent fluorescent levels of the Sm3+ ions in the titled glasses. The experimental lifetimes (τexp) measured from the PL decay curves are correlated with τR to estimate quantum efficiency (ƞ) of the as prepared glasses. The quantum efficiency, emission cross sections and other radiative parameters along with the CIE coordinates estimated for the Sm3+ ions doped SbPbOFB glasses finally allows us to contemplate its potentiality for the fabrication of optoelectronic devices in visible reddish-orange region.