Ks. Sohn et al., Effect of inter-ionic interaction on photoluminescence property of yttriumaluminate garnet phosphors, J MAT S-M E, 12(3), 2001, pp. 179-186
The photoluminescence of Terbium-activated yttrium aluminate with the gener
al formula Y3-XTbXAl5O12 was investigated as a function of Tb3+ concentrati
on. The main attention is focused on the D-5(3)/D-5(4) fluorescence and its
energy transfer behavior. The emission and excitation spectra were measure
d in terms of Tb3+ concentration and analyzed in view of the application fo
r plasma display panel (PDP). Also, the diffuse reflectance spectra were me
asured and analyzed in the range from VUV to UV. As a result, the yttrium a
luminate was found to have a broad excitation band extending from VUV to UV
range and to show the typical concentration quenching behaviors both for D
-5(3) and D-5(4) fluorescence. The energy transfer was investigated by anal
yzing the decay curve of D-5(3) and D-5(4) emission based on the multipolar
interaction or the exchange interaction. The decay curves of D-5(3) emissi
on, for which well known cross relaxation has been accepted as a main facto
r, were analyzed by Inokuti and Hirayama's formula based on the direct quen
ching scheme. The decay curves of D-5(4) emission were analyzed by Yokota a
nd Tanimoto's formula based on the diffusion limited quenching scheme. (C)
2001 Kluwer Academic Publishers.