Observation of two independent energy transfer mechanisms in BaAl12O19:Ce0.063++Eux2+ phosphor

Two independent energy transfer mechanisms through electric multipole interactions between donor and acceptor ions have been found in BaAl12O19 : Ce-0.06(3+) + E-x(2+) phosphor. The first energy transfer takes place between the Ce ion and the E ion which strongly depends on the concentration of Eu2+ ions. The second energy transfer occurs between the Ce3+ ion and the Ce3+-O-Me complexes. Both energy transfer mechanisms were explained in ten-ns of combined electric multipole interactions. (C) 2001 Published by Elsevier Science Ltd.