Spectroscopy and energy transfer in lead borate glasses doubly doped with Dy(3)(+)-Tb(3+) and Tb(3)(+)-Eu(3+) ions.
Lead borate glasses doubly doped with Dy(3)(+)-Tb(3+) and Tb(3+)-Eu(3+) were investigated using optical spectroscopy. Luminescence spectra of rare earths were detected under various excitation wavelengths. The main green emission band due to (5)D4→(7)F5 transition of Tb(3+) is observed under excitation of Dy(3+), whereas the main red emission band related to (5)D0→(7)F2 transition of Eu(3+) is successfully observed under direct excitation of Tb(3+). In both cases, the energy transfer processes from Dy(3+) to Tb(3+) and from Tb(3+) to Eu(3+) 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.
Institute of Chemistry, University of Silesia, Szkolna 9, 40-007 Katowice, Poland. Electronic address: joanna.pisarska@us.edu.pl.
Joanna
J
Pisarska
Institute of Chemistry, University of Silesia, Szkolna 9, 40-007 Katowice, Poland.
Agnieszka
A
Kos
Institute of Chemistry, University of Silesia, Szkolna 9, 40-007 Katowice, Poland.
Wojciech A
WA
Pisarski
D001881:Borates / Q000737:chemistry*; D002412:Cations / Q000737:chemistry; D004419:Dysprosium / Q000737:chemistry*; D004735:Energy Transfer; D005063:Europium / Q000737:chemistry*; D005898:Glass / Q000737:chemistry*; D007854:Lead / Q000737:chemistry*; D049449:Luminescence; D013725:Terbium / Q000737:chemistry*
D001881:Borates; D002412:Cations; D013725:Terbium; D004419:Dysprosium; D007854:Lead; D005063:Europium
Energy transfer processes; Lead borate glasses; Luminescence; Rare earth ions