Rare-earth-free white emitting Ba2TiP2O9 phosphor: Revealing its crystal structure and photoluminescence properties

Takuya Hasegawa, Sun Woog Kim, Shinnosuke Kamei, Tadashi Ishigaki, Kazuyoshi Uematsu, Koutoku Ohmi, Kenji Toda, Mineo Sato

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)


A high intensity bluish-white emitting Ba2TiP2O9 phosphor was synthesized by a conventional solid-state reaction method and the precise crystal structure was investigated for the first time by Rietveld refinement analysis. Ba2TiP2O9 has a monoclinic crystal structure with a space group C2/c (no. 15), which is built out of PO4 tetrahedra and TiO5 pyramidal polyhedra connected to form a chain structure along the c-axis. The emission of Ba2TiP2O9 is due to a charge transfer transition between Ti4+-O2- in the pyramidal TiO5. The obtained Ba2TiP2O9 was excited efficiently by UV and VUV and displayed a bright bluish-white luminescence.

Original languageEnglish
Pages (from-to)11554-11559
Number of pages6
JournalDalton Transactions
Issue number28
Publication statusPublished - 2016
Externally publishedYes

ASJC Scopus subject areas

  • Inorganic Chemistry


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