Structural and spectroscopic studies on Er3+ doped boro-tellurite glasses

摘要: Abstract Er 3+ doped boro-tellurite glasses with the chemical composition (69− x )B 2 O 3 − TeO −15MgO−15K O−1Er (where =0, 10, 20, 30 and 40 wt%) have been prepared their structural spectroscopic behavior were studied reported. The varying tellurium dioxide content in host matrix that results, changes around ions are explored through XRD, FTIR, UV–VIS–NIR luminescence measurements. XRD pattern confirms amorphous nature of FTIR spectra explore fundamental groups local units glasses. bonding parameters ( β ¯ δ ) calculated from observed band positions absorption to claim ionic/covalent Judd–Ofelt (JO) intensity Ω λ =2, 4 6) determined experimental oscillator strengths obtained results compared reported literature. variation JO change discussed detail. also used derive important radiative properties like transition probability A ), branching ratio R peak stimulated emission cross-section σ P E for excited state transitions H 9/2 → I 15/2 11/2 S3 /2 Using Davis Mott theory, optical gap energy opt values direct indirect allowed along Urbach present study. similar results.