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Issue 41, 2005
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Colloidal LaF3:Yb,Er, LaF3:Yb,Ho and LaF3:Yb,Tm nanocrystals with multicolor upconversion fluorescence

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Abstract

The IR-to-visible upconversion fluorescent nanocrystals, Yb–Er, Yb–Ho and Yb–Tm co-doped LaF3 were chemically synthesized and investigated. The ligand-capped nanocrystals were easily dispersed in organic solutions and subsequently formed a transparent colloidal solution. Under 980 nm IR excitation, green, red and blue emission bands were observed from these colloidal solutions, respectively. Compared with the recently reported colloidal NaYF4:Yb,Er nanocrystals, our nanocrystals produced a fluorescence output which was 5 times higher. These nanocrystals have potential applications as bio-probes and displays.

Graphical abstract: Colloidal LaF3:Yb,Er, LaF3:Yb,Ho and LaF3:Yb,Tm nanocrystals with multicolor upconversion fluorescence

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Publication details

The article was received on 16 Jun 2005, accepted on 15 Aug 2005 and first published on 07 Sep 2005


Article type: Paper
DOI: 10.1039/B508240D
Citation: J. Mater. Chem., 2005,15, 4460-4464
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    Colloidal LaF3:Yb,Er, LaF3:Yb,Ho and LaF3:Yb,Tm nanocrystals with multicolor upconversion fluorescence

    G. Yi and G. Chow, J. Mater. Chem., 2005, 15, 4460
    DOI: 10.1039/B508240D

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