Synthesis and upconversion luminescence properties of YF3:Yb3+/Tm3+ octahedral nanocrystals

Guofeng Wang, Weiping Qin, Guodong Wei, Lili Wang, Peifen Zhu, Ryongjin Kim, Daisheng Zhang, Fuheng Ding, Kezhi Zheng

Research output: Contribution to journalArticlepeer-review

33 Scopus citations

Abstract

YF3:Yb3+(20%)/Tm3+(2%) octahedral nanocrystals were synthesized by a microemulsion method with NH4HF2. Pumped with a 980-nm diode laser, the nanocrystals emitted weak blue and intense ultraviolet light. Especially, unusual 3P2 3H6 (∼265 nm) and 3P2 3F4 (∼309 nm) emissions, coming from a five-photon excitation process, were observed. The emissions from 1D2 and 1I6 were much stronger than those from 1G4 and 3H4. The upconversion mechanism was discussed in detail.

Original languageEnglish
Pages (from-to)158-161
Number of pages4
JournalJournal of Fluorine Chemistry
Volume130
Issue number2
DOIs
StatePublished - Feb 2009
Externally publishedYes

Keywords

  • Luminescence
  • Nanocrystals
  • Rare earth
  • Upconversion

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