Size-dependent upconversion luminescence in YF3:Yb3+/Tm3+ nanobundles

Guofeng Wang, Weiping Qin, Yue Xu, Lili Wang, Guodong Wei, Peifen Zhu, Ryongjin Kim

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23 Scopus citations


The upconversion luminescent properties of YF3:Yb3+(20%)/Tm3+(1%) nanobundles with different sizes (240-500 nm in length) were studied under 980-nm excitation. Ultraviolet (1I6 3F4/3H6 and 1D2 3H6), blue (1D2 3F4 and 1G4 3H6), red (1D2 3H4, 1G4 3F4, and 3F3 3H6), and near infrared (3H4 3H6) emissions were observed. The results indicated that the relative intensity of the ultraviolet to the blue as well as the blue to the near infrared increased with decreasing the size of nanobundles. Especially, the position of the dominant red emission peak varied with the size of nanobundles. As the length of nanobundles increased to 500 nm, unusual 3F3 3H6 transition was observed, which was theoretically explained considering the decrease of the nonradiative transition rate of 3F3 3H4.

Original languageEnglish
Pages (from-to)1110-1113
Number of pages4
JournalJournal of Fluorine Chemistry
Issue number11
StatePublished - Nov 2008
Externally publishedYes


  • Nanobundles
  • Upconversion luminescence
  • YF


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