Analysis of luminescent properties of 40PbO–35Bi2O3–25Ga2O3 glasses doped with Er2O3

Abstract

The Er³⁺ doped lead–bismuth–gallium oxide glasses were prepared by melt quenching technique. The spectral and luminescent properties were analyzed based on experimental and theoretical calculations. Analysis of Er³⁺ concentration dependences of density and electronic optical polarizability was carried out. The radiative lifetime values for ⁴S_3/2 and ⁴F_9/2 energy states were calculated using Judd-Ofelt theory. In the glassy system under study, the concentration quenching of state ⁴S_3/2 was discovered at content of erbium ions above 0.869 × 10²⁰ cm⁻³. It was also shown that ⁴F_9/2 energy state was isolated from concentration effects and showed an increase in luminescence intensity with increasing concentration of activator ions. The luminescence quantum efficiency for transition ⁴S_3/2 → ⁴I_15/2 was about 40%, which allows us to consider this system as a glassy matrix effective for activation by rare-earth ions.