Improved luminescence properties of Na2TiSiO5 phosphor by the Ge4+ doping in the crystal lattice

Young Ji Park, Sun Woog Kim, Kazuma Sugimoto, Takuya Hasegawa, Koudai Tanima, Kazuyoshi Uematsu, Kenji Toda, Mineo Sato

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


Rare earth free white emitting Na2TiSi1-xGexO5 phosphors were synthesized by a conventional solid-state reaction method, and the photoluminescence properties were characterized. The phosphors obtained in the present study showed broad bluish-white emission with a peak at 485 nm due to the charge transfer transition between O2- and Ti4+ and the emission peak intensity was effectively enhanced by the Ge4+ doping in the Na2TiSiO5 crystal lattice. The emission peak intensity of Na2TiSi0.5Ge0.5O5 was 1.35 times higher than that of Na2TiSiO5 and the CIE chromaticity coordinate values for the phosphor were x = 0.29 and y = 0.38.

Original languageEnglish
Pages (from-to)460-463
Number of pages4
JournalJournal of Ceramic Processing Research
Issue number5
Publication statusPublished - 2019 Oct


  • NaTisiO
  • Rare earth free
  • White emission phosphor

ASJC Scopus subject areas

  • Ceramics and Composites

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