Analysis of Eu3+-ions concentration effect on the spectral properties of zinc-barium-boron-tellurite glasses

The present study aims to examine the concentration effect of Eu³⁺ ions in Boro Tellurite glass and how it affects its physicochemical and photo luminescent characteristics. Using the melt quenching method, a series of Boro-Telluride glasses with the composition (30-x) TeO₂–30B₂O₃–10ZnO–30BaO–xEu₂O₃ (where x = 0.00, 0.05, 0.10, 0.50, 1.00, 1.50, 2.00, and 2.50 mol%) were synthesized. The results of the XRD analysis revealed that the prepared samples are amorphous. As the concentration of the Eu₂O₃ increases, the density and refractive index rise, but the molar volume decreases, indicating that the glass matrix has become more compact. Similarly, the absorption spectra and oscillator strength calculated with JO theory demonstrate the transition from 7F₀ to ⁵L₆ (in the UV–Vis region) and ⁷F₀ to ⁵L₆ (in the NIR region) is more intense. For TBZB–Eu7 glass, the phonon sideband energy is estimated to be 717 cm⁻¹ and compared with the BGO scintillator, the integrated scintillation efficiency is estimated to be 16.14%. These findings demonstrate that the current glasses doped with 2 mol% Eu³⁺ exhibit strong luminescence qualities and can be used for portal imaging systems (MeV energies) non-destructive analysis such as industrial and medical X-ray imaging systems, and also have potential for laser application.