Synthesis and characterization of Yb3+,Tm3+:Ba 2YF7 nanocrystalline with efficient upconversion fluorescence

Xiaohong Chuai, Daisheng Zhang, Dan Zhao, Kezhi Zheng, Chunfeng He, Feng Shi, Lili Wang, Huan Chen, Weiping Qin

Research output: Contribution to journalArticlepeer-review

18 Scopus citations

Abstract

A novel upconversion luminescence nanocrystals Yb3+,Tm 3+:Ba2YF7 were synthesized via the hydrothermal method. They have uniform morphology with a mean size of 30 nm even if annealed at 600 °C. Pumped by 980 nm laser diode the as-synthesized powers emit ultraviolet/blue light, which is in the range of the specific upconversion luminescent spectra of Tm3+ ions. After post-annealing at 600 °C in an argon atmosphere for 2 h, their upconversion luminescence intensity is 5 multiple improved and the ultraviolet/blue light can even be seen by the naked eyes under a low excitation power of 20 mW. This indicates that Ba 2YF7 is a very effective luminescent host material. Excitation power dependences of individual upconversion emission intensity are plotted, which partly uncover the upconversion luminescence mechanism of Tm 3+ ions.

Original languageEnglish
Pages (from-to)2368-2370
Number of pages3
JournalMaterials Letters
Volume65
Issue number15-16
DOIs
StatePublished - Aug 2011
Externally publishedYes

Keywords

  • Nanocrystalline materials
  • Optical materials and properties

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