Structure and Luminescent Properties of Glasses in the GeS(2)-Ga(2)S(3)-Sb(2)S(3):Pr(3+) System

The physicochemical, optical, and luminescent properties and structures of glasses of the Ga(2)S(3)-GeS(2)-Sb(2)S(3):Pr system have been studied in a wide range of concentrations of the main components in order to reveal their correlation with the composition. According to the calculations using the Judd–Ofelt theory, glasses with a high content of Sb(2)S(3) should provide the highest luminescence efficiency of Pr(3+) ions. However, this result is leveled by enhancing the concentration quenching effect, followed by an increase of the Sb(2)S(3) content in the glasses. The introduction of Pr leads to a significant increase in the fraction of Sb-Sb, Sb-Ge, Ge-Ge bonds in glasses enriched with Sb(2)S(3) and GeS(2). In the cases of the glasses enriched with Ga(2)S(3), this effect was not observed, apparently because Ga promotes the formation of three-coordinated sulfur atoms.