The Energy Transfer Between Ce3+ and Tb3+ Ions in LaOBr : Ce3 + , Tb3+

Abstract

The energy transfer between Ce3+ and Tb3+ ions in , Tb3+ was systematically studied. The emission spectra of Ce3+ and Tb3+ in , Tb3+ have been measured with excitation at 355 and 250 nm. At the same time, the fluorescence lifetime and time‐resolved spectra in nanosecond scale, for a series of samples doped with different concentrations, were measured. The temperature dependence of energy transfer efficiency and probability of energy transfer from Ce3+ to Tb3+ was studied. It was found that energy is transferred, not only from Ce3+ to Tb3+, but also from Tb3+ to Ce3+. A model of energy transfer is proposed.