Cerium luminescence in nd0 perovskites

The luminescence of Ce3+ in perovskite (ABO3) hosts with nd0 B-site cations, specifically Ca(Hf,Zr)O3 and (La,Gd)ScO3, is investigated in this report. The energy position of the Ce3+ excitation and emission bands in these perovskites is compared to those of typical Al3+ perovskites; we find a Ce3+ 5d1 centroid shift and Stokes shift that are larger versus the corresponding values for the Al3+ perovskites. It is also shown that Ce3+ luminescence quenching is due to Ce3+ photoionization. The comparison between these perovskites shows reasonable correlations between Ce3+ luminescence quenching, the energy position of the Ce3+ 5d1 excited state with respect to the host conduction band, and the host composition.