| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1229916 | Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy | 2014 | 5 Pages |
•Spectroscopic properties of rare earth doubly doped lead borate glasses were investigated.•Luminescence of Tb3+ was successfully detected under excitation of Dy3+.•Luminescence of Eu3+ was successfully detected under excitation of Tb3+.•The energy transfer processes between rare earth ions in lead borate glass were evidenced.
Lead borate glasses doubly doped with Dy3+–Tb3+ and Tb3+–Eu3+ were investigated using optical spectroscopy. Luminescence spectra of rare earths were detected under various excitation wavelengths. The main green emission band due to 5D4 → 7F5 transition of Tb3+ is observed under excitation of Dy3+, whereas the main red emission band related to 5D0 → 7F2 transition of Eu3+ is successfully observed under direct excitation of Tb3+. In both cases, the energy transfer processes from Dy3+ to Tb3+ and from Tb3+ to Eu3+ in lead borate glasses occur through a nonradiative processes with efficiencies up to 16% and 18%, respectively. The presence of energy transfer process was also confirmed by excitation spectra measurements.
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