Abstract
We report on one kind of green luminescent sintered porous glass which is doped with Tb3+, Gd3+, and Ce3+. The glass can emit strong green luminescence by excitation of long wavelength UV sources. The fluorescence spectra reveal that the strong luminescence is mainly originated from the 5D4-7F5 transition of Tb3+. There are several possible energy transfer mechanisms, that is, the energy transfer directly from Ce3+ to Tb3+, or energy transfer from Ce3+ to Gd3+, and then to Tb3+. It is found that the fluorescence is mainly dominated by energy transfer from Ce3+ to Tb3+.
