Energy Transfer Between Tb[sup 3+] Ions in YAlO[sub 3] Host

Abstract

The present investigation aims at elucidating the photoluminescence behavior of activated yttrium aluminate perovskite (YAP) phosphors. The attention is especially focused on the fluorescence and its energy transfer behavior. The decay curves of emission were measured in terms to content. Emission and excitation spectra as well as diffuse reflectance spectra were measured in the range spanning from vacuum ultraviolet (VUV) to UV. The energy tranfer between ions was also investigated by analyzing the decay curves of emission based not only on the multipolar interaction (dipole‐dipole) but also on the exchange interaction. The rate equation including the contribution of 5d level was also proposed, which takes two different types of nonlinear terms into consideration. One is a well‐known term designating the cross relaxation from to level, while the other square term represents the second type of cross relaxation from to level. © 2000 The Electrochemical Society. All rights reserved.