A comprehensive study of electrical and optical properties of phosphate oxide-based glasses doped with Er2O3.

In this study, the radiative parameters were acquired from the UV absorption spectra and the luminescence spectra of Er³⁺ ions doped Er₂O₃-Al₂O₃-Na₂O-P₂O₅ glasses. The intensity of each absorption spectrum was utilized to deduce the radiative parameters and the parameters (Ω₂, Ω₄ and Ω₆) of Judd-Ofelt theory. The FTIR and the elastic moduli of the quaternary glasses are also investigated. Analysis of the FTIR suggested that the presence of Er³⁺ ions created bridging oxygens and polymerized the local structure around atoms. This procedure manifested itself from decreasing the bond length of O-P and increasing the O/P ratio. The polymerization of the phosphate structure increased the ultrasonic velocity and the rigidity of the network. The electrical parameters of the phosphate glasses, such as the frequency and temperature dependence AC conductivity, dielectric loss and dielectric modulus were carried out. The Er³⁺ ions affected the carrier mobility by decreasing the electrical conductivity and increasing the activation energy. In addition, the frequency and temperature dependence of the dielectric modulus exhibited a Debye-type relaxation behavior. [ABSTRACT FROM AUTHOR]