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Synthesis and Upconversion Luminescence of Hexagonal‐Phase NaYF 4 :Yb, Er 3+ Phosphors of Controlled Size and Morphology
Author(s) -
Zeng J.H.,
Su J.,
Li Z.H.,
Yan R.X.,
Li Y.D.
Publication year - 2005
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.200402046
Subject(s) - materials science , phosphor , luminescence , hexagonal crystal system , morphology (biology) , photon upconversion , phase (matter) , hexagonal phase , crystallography , analytical chemistry (journal) , nanotechnology , chemical engineering , optoelectronics , organic chemistry , chemistry , biology , engineering , genetics
Green upconversion emission from hexagonal‐phase NaYF 4 :Yb, Er 3+ 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.