Investigation of the up-conversion properties of Er–Yb-doped calcium tantalates with various Ca/Ta ratios

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

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Er3+/Yb3+ co-doped calcium tantalate up-conversion (UC) phosphors were synthesized via a parallel synthesis scheme using the gelable citrate complex method. Samples with various Ca/Ta atomic ratios were prepared, and their UC emission properties were compared. Under 980-nm near-infrared laser excitation, α-Ca2Ta2O7: Er3+, Yb3+ showed an extremely weak UC emission intensity and CaTa4O11: Er3+, Yb3+ demonstrated an excellent UC emission intensity. In addition, the local symmetry around the rare-earth dopant ions affected the UC luminescence properties.

Original languageEnglish
Pages (from-to)507-512
Number of pages6
JournalJournal of Photopolymer Science and Technology
Volume30
Issue number4
DOIs
Publication statusPublished - 2017 Jan 1

Keywords

  • CaTaO
  • Calcium tantalate
  • Rare-earth
  • Up-conversion phosphor

ASJC Scopus subject areas

  • Polymers and Plastics
  • Organic Chemistry
  • Materials Chemistry

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