Spectroscopic refinement of the Eu3+ ions enriched Alkaline-earth oxyfluoro ternary glasses for enhanced performance of red laser and optoelectronic applications

Abstract

The existing study scrutinizes the luminescence performance of the Eu³⁺ enriched ternary (tri-formers B₂O₃, TeO₂, Bi₂O₃ involved) glasses modified with alkaline-earth elements in the form of oxides and fluorides. The ternary glasses with unique composition 64B₂O₃+15TeO₂ +20Bi₂O₃+1Eu₂O₃ & 44B₂O₃+15TeO₂+20Bi₂O₃+20 M+1Eu₂O₃ (where M = SrO, SrF₂, BaO and BaF₂) have been fabricated adopting melt-quench process. The physical traits were estimated to examine the structural and optical behavior of the glasses. The UV/Vis/NIR optical absorption was investigated to study the 4f−4f electronic transitions in detail and the bonding dynamics were tested through the nephelauxetic effect. The coherent trend Ω₂>Ω₄>Ω₆ observed in all the samples signifies the dominant asymmetric and covalence network amid Eu³⁺ ions and the ligands. Using the PL spectra, the colorimetric studies were carried out to obtain the exact emission totality, and the host sensitive parameters are also estimated to verify the existing nature of the bonding network. To observe the potential candidate for lasing, the radiative parameters were assessed using Judd-Ofelt intensity parameters. The SrF₂ modifier incorporated glass display enhanced values of the radiative parameters which in turn confirms the suitability for red-light emission. Incorporating modifiers into the matrix enhances the radiative emission which in turn establishes the optical applications. The decay analysis revealed insights into the excited-state lifetimes, demonstrating a direct correlation between the Eu³⁺ content and the radiative efficiency of the glasses. The quantum efficiency was observed as 75 % for the Eu:BTSrF glass which signals its aptness for optoelectronics applications.