Study on the structure and luminescence quenching of Pr doped Na_(0.5)Bi_(4.5)Ti_4O_(15) multifunctional ceramics

摘要

In this work, Pr doped Na_(0.5)Bi_(4.5)Ti_4O_(15) 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 ~3P_0 level over red emission from ~1D_2 level. The emission from ~3P_0 level is more subject to non-radiative relaxation than that from ~1D_2 level, however, the emission from ~1D_2 level is more strongly affected by concentration quenching than that from ~3P_0 level. Besides, oxygen vacancy-related luminescence quenching is also observed.