Blue photoluminescence, greenish-blue afterglow and their Ti-concentration dependence in rare earth-free bazirite-type BaZr1-xTi xSi309

Kenichiro Iwasaki, Yoshihiro Takahashi, Hirokazu Masai, Takumi Fujiwara

Research output: Contribution to journalArticlepeer-review

33 Citations (Scopus)

Abstract

We synthesized Ti-bearing bazirite (BaZr1-xTixSi 3O9), 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 309) 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.

Original languageEnglish
Pages (from-to)18054-18062
Number of pages9
JournalOptics Express
Volume17
Issue number20
DOIs
Publication statusPublished - 2009 Sep 28

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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