Synthesis and Upconversion Luminescence of Hexagonal-Phase NaYF4:Yb, Er3+ Phosphors of Controlled Size and Morphology


  • This work was supported by NSFC (50372030, 20025102, 20131030), the Specialized Research Fund for the Doctoral Program of Higher Education, the Foundation for the Author of National Excellent Doctoral Dissertation of P.R. China, and the State Key Project of Fundamental Research for Nanomaterials and Nanostructures (2003CB716901).


Green upconversion emission from hexagonal-phase NaYF4:Yb, Er3+ phosphors can be directly observed with the naked eye. Powders with controlled size and morphology can be synthesized in ethanol and show a minimal decrease in luminescence intensity after 24 h (see Figure). The intense upconversion emission suggests good crystallinity of the materials, which may be used in biological labeling.

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