Abstract
In this work, Pr doped Na0.5Bi4.5Ti4O15 ceramics are prepared via conventional solid reaction method. We particularly here report that the emission spectra under 451 nm excitation is dominated by green emission from 3P0,1 level over red emission from 1D2 level. The emission from 3P0,1 level is more subject to non-radiative relaxation than that from 1D2 level, however, the emission from 1D2 level is more strongly affected by concentration quenching than that from 3P0,1 level. Besides, oxygen vacancy-related luminescence quenching is also observed.
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