Highly efficient multicolour upconversion emission in transparent colloids of lanthanide-doped NaYF4 nanocrystals

Autor(en): Heer, S
Kompe, K
Gudel, HU
Haase, M 
Stichwörter: BLUE; Chemistry; Chemistry, Multidisciplinary; Chemistry, Physical; GREEN; IN-VIVO; Materials Science; Materials Science, Multidisciplinary; MICROSCOPY; Nanoscience & Nanotechnology; PHOSPHORS; Physics; Physics, Applied; Physics, Condensed Matter; QUANTUM DOTS; Science & Technology - Other Topics
Erscheinungsdatum: 2004
Herausgeber: WILEY-V C H VERLAG GMBH
Journal: ADVANCED MATERIALS
Volumen: 16
Ausgabe: 23-24
Startseite: 2102+
Zusammenfassung: 
Highly efficient photon upconversion in solution is demonstrated for the first time. Transparent colloidal solutions of Yb/Er and Yb/Tm doped NaYF4 nanocrystals show bright upconversion emission in the red, green, and blue spectral region by excitation around 1 mum with a laser of moderate power (see Figure and also inside front cover). These new systems show a substantial improvement on the order of 10(8) compared to previously reported systems.
ISSN: 09359648
DOI: 10.1002/adma.200400772

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