Blue photoluminescence, greenish-blue afterglow and their Ti-concentration dependence in rare earth-free bazirite-type BaZr1-xTixSi3O9.
We synthesized Ti-bearing bazirite (BaZr(1-x)Ti(x)Si(3)O(9), x=0-0.2) and examined their spectroscopic features comprehensively, in order to elucidate the photoluminescent properties in the bazirite phase. Strong emission around 2.79 eV was observed in the synthetic bazirite phase with x=0.01 by UV excitation, which exhibited an internal quantum yield of 72% at room temperature. In addition, the bazirite phases also showed clear afterglow with peak around 2.62 eV in the range of x=0.005-0.03, whereas no afterglow property was confirmed in Ti-bearing pabstite (BaSnSi(3)O(9)) phases, in spite of being isostructural of bazirite. It was demonstrated that presence of Zr-related center is a necessary condition for evolution of the afterglow property in the bazirite structure.
Iwasaki
Kenichiro
K
Department of Applied Physics, Tohoku University, 6-6-05 Aoba, Aoba-ku, Sendai, Miyagi 980-8579, Japan.
Takahashi
Yoshihiro
Y
Masai
Hirokazu
H
Fujiwara
Takumi
T
D003116:Color; D049408:Luminescent Agents / Q000737:chemistry*; D008422:Materials Testing; D008674:Metals, Rare Earth / Q000737:chemistry* / Q000528:radiation effects; D014025:Titanium / Q000737:chemistry* / Q000528:radiation effects; D014466:Ultraviolet Rays
D049408:Luminescent Agents; D008674:Metals, Rare Earth; D014025:Titanium