Wydział Chemii

Łukasz Marek

Marcin Sobczyk

2022

Journal of Non-Crystalline Solids

576

121238/1-121238/8

10.1016/j.jnoncrysol.2021.121238

Naukowa

Angielski

Artykuł

Tellurite glasses of the chemical composition: xDy₂O₃-(7-x)La₂O₃–3Na₂O-25ZnO-65TeO₂, where (0 < x ≤ 7) were obtained by the melt quenching technique. The spectroscopic characteristic of Dy³⁺- doped title glasses was carried out based on absorption and luminescence spectra as well as luminescence decay kinetics measurements. The Judd-Ofelt intensity parameters Ω_λ (λ= 2, 4, 6) have been evaluated from the absorption spectrum and subsequently used to calculate the spontaneous emission probabilities, luminescence branching ratios and radiative lifetime of ⁴F_9/2 emitting level of Dy³⁺. The emission cross-sections for Dy³⁺ transitions in the visible range have been determined applying Füchtbauer-Ladenburg formula. The luminescence decay measurements revealed strong concentration quenching of Dy³⁺ emission. The non-exponential decay curves have been fitted in the frame of Inokuti-Hirayma model, indicating that the dipole-dipole interaction plays an important role in luminescence quenching of ⁴F_9/2 level. The temperature dependence of luminescence decay times of ⁴F_9/2 state of Dy³⁺ has been investigated.

Tellurite glasses, Luminescence, Judd-Ofelt theory, Thermal quenching, Optical properties, Dysprosium

http://dx.doi.org/10.1016/j.jnoncrysol.2021.121238

http://www.elsevier.com