Open AccessBlue photoluminescence, greenish-blue afterglow and their Ti-concentration dependence in rare earth-free bazirite-type BaZr_1-xTi_xSi_3O_9
Author(s) -
Kotaro Iwasaki,
Yoshihiro Takahashi,
Hirokazu Masai,
Takeshi Fujiwara
Publication year - 2009
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.17.018054
Subject(s) - afterglow , photoluminescence , isostructural , materials science , quantum yield , analytical chemistry (journal) , phase (matter) , luminescence , yield (engineering) , crystallography , optics , crystal structure , physics , chemistry , optoelectronics , fluorescence , astrophysics , gamma ray burst , chromatography , metallurgy , quantum mechanics
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.