| Autor: |
Lien, Nguyen Thi Quynh, An, Nguyen Thi Thai, Tam, Nguyen Minh, Tuyen, H. V., Trac, N. N. |
| Předmět: |
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| Zdroj: |
Journal of Electronic Materials; Sep2023, Vol. 52 Issue 9, p6052-6061, 10p |
| Abstrakt: |
A spectroscopic study of Eu3+, Tb3+ and Eu3+/Tb3+ ions-doped zinc sodium borotellurite (ZNB) glass synthesized by a melt-quenching method was performed via photoluminescence spectra and luminescence decay. The results of X-ray diffraction showed the amorphous materials of the prepared glass, and also indicated the difference in absorption spectra between glass samples doped by Eu3+ and Tb3+ ions. Three phonon energies of the ZNB host lattice were found around 932 cm−1, 1282 cm−1 , and 1892 cm−1 through the excitation spectra of Eu3+ and Tb3+ ions. The multiphonon relaxation rate (Wmp) was estimated for each phonon sideband and compared with previously reported results. Intensity parameters (Ωλ) were determined by the Judd–Ofelt theory and their values were used to evaluate the radiative transition of Eu3+ ions in ZNB glass, such as calculated lifetime (τcal), transition probability rate (A), effective line width (Δλeff), stimulated emission cross-section (σp), and branching ratio (βR). Eu3+/Tb3+ co-doped in ZNB glass exhibited multicolor emissions and the energy transfer process between Tb3+ and Eu3+ ions was confirmed based on the analysis of excitation spectra and decay time. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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