<span style="font-size:12.0pt;line-height: 115%;font-family:"Times New Roman","serif";mso-fareast-font-family:"Times New Roman"; mso-ansi-language:EN-IN;mso-fareast-language:EN-IN;mso-bidi-language:HI" lang="EN-IN">Influence of modifiers on optical properties of ZnF₂-TeO₂ glass system doped with Eu³⁺ ions</span>

Abstract

<span style="font-size:12.0pt;line-height: 115%;font-family:" times="" new="" roman","serif";mso-fareast-font-family:"times="" roman";="" mso-ansi-language:en-in;mso-fareast-language:en-in;mso-bidi-language:hi"="" lang="EN-IN">ZnF₂-MO-TeO₂ (MO = PbO, ZnO and CdO) glasses doped with Eu³⁺ ions have been prepared and samples are characterized by X-ray diffraction and differential scanning calorimetric studies. Optical absorption, photoluminescence, infrared spectra and thermoluminescence studies have been carried out; from the measured intensities of various absorption bands of these glasses the Judd-Ofelt parameters Ω₂, Ω₄and Ω₆ have been evaluated. The Judd-Oflet theory could successfully be applied to characterise the absorption and luminescence spectra of these glasses. From this theory various radiative properties like transition probability A, branching ratio <span style="font-size:12.0pt;line-height:115%;font-family:" times="" new="" roman","serif";="" mso-fareast-font-family:hiddenhorzocr;mso-ansi-language:en-in;mso-fareast-language:="" en-in;mso-bidi-language:hi"="" lang="EN-IN">β_r ,<span style="font-size:12.0pt;line-height:115%;font-family:" times="" new="" roman","serif";="" mso-fareast-font-family:"times="" roman";mso-ansi-language:en-in;mso-fareast-language:="" en-in;mso-bidi-language:hi"="" lang="EN-IN">the radiative life time τ_R and the emission cross-section σ^E for various emission levels of these glasses have been determined and reported. The analysis of these results with the aid of IR spectra and thermoluminescence studies, it has been identified that CdO mixed tellurite glass as the most favourable host for Eu³⁺ doping and to give high luminescence efficiency.</span></span></span>