Ho3+ codoping of YAG:Ce: Acceleration of Ce3+ decay kinetics by energy transfer

Ho³⁺ codoping of YAG:Ce induces an acceleration of Ce³⁺ decay. This is caused by a non-radiative energy transfer from Ce³⁺ to Ho³⁺ which is enabled by a multipolar interaction between the ions. The photoluminescence decay characteristics were examined in a wide range of Ho³⁺ concentrations and 1/e decay time of Ce³⁺ was accelerated more than six times. The decay curves were analyzed using the Förster-Dexter model. The critical concentration of Ho³⁺, useful for quantitative decay time tailoring, was calculated. These results of the decay evaluation of YAG:Ce codoped with Ho³⁺ were compared to those obtained from the recent study on YAG:Ce codoped with Er³⁺ [1].