Influence of Al3+ and Sb3+ ions on thermo and photoluminescence properties of Pr2O3 doped PbO – SiO2 glasses for optical use

Abstract

The chemical composition of (SiO2)59.9 – (PbO)30 – (Pr2O3)0.1 – (Sb2O3)x: (Al2O3)y – x have chosen for present glass synthesis, where the variable ‘x’ varies from 0 to 10 mol% and againstly ‘y’ varies from 10 to 0 mol% with a step size of 2 mol%. The samples were characterized by structural, photo and thermoluminescence techniques. The evolutions of thermal stability, elastic modulus, micro hardness and glass transition quantities advised that they are mechanically hard in nature. The γ - irradiated trap-depth parameters such as A.E. (~0.371eV) and shape symmetry ratio (~0.236) related to the thermoluminiscence characterization advised that the sample code ‘PAS6’ is a useful TL asset. The Judd - Ofelt quantities are derived from optical absorption spectra such as Ω2, Ω4 and Ω6 are found to be best for the glass code ‘PAS6’ (~8.64, ~4.65 and ~3.88 × 10−20 cm2) is a useful optical resource. Radiative parameters derived from photoluminescence characterization such as spectroscopic quality factor (~1.198), effective bandwidth (Δλ ~ 32 nm), transition probability (At = 1271 s−1), stimulated emission cross section (σ = 1.321 × 10−20 cm2), branching ratio (β ~ 49%) and radiative life time (τrad = 217 μs) are advising that the sample code ‘PAS6’ is a useful luminescent resource for various optical applications.