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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