Screening of Er3+/Yb3+ codoped RE-Ta-O and RE-Nb-O (RE = Y, La, or Gd) upconversion phosphors

Sayaka Tamura, Michio Iwaoka, Yasushi Sato, Makoto Kobayashi, Masato Kakihana, Koji Tomita

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


Upconversion (UC) phosphors comprising Er3+/Yb3+ codoped rare-earth complex oxides, RExTayOz and RExNbyOz (RE = Y, La, or Gd), were synthesized via the gelable citrate complex method, and their UC emission properties were compared. This led to the discovery of an intense green-emitting UC phosphor, YTa7O19:Er3+/Yb3+, which is the first example of a YTa7O19 UC phosphor host material. Green UC emission obtained using optimum Er3+ and Yb3+ content was 20 times stronger than that obtained using a Y2O3 host.

Original languageEnglish
Pages (from-to)890-891
Number of pages2
JournalChemistry Letters
Issue number8
Publication statusPublished - 2016


  • Complex oxide
  • Gelable complex method
  • Upconversion phosphor

ASJC Scopus subject areas

  • Chemistry(all)

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