Visible light emission upon near-infrared excitation in a transparent solution of nanocrystalline beta-NaGdF4 : Yb3+, Er3+
| Autor(en): | Aebischer, A Heer, S Biner, D Kramer, K Haase, M Gudel, HU |
Stichwörter: | BLUE; Chemistry; Chemistry, Physical; CORE; GREEN; NANOPARTICLES; Physics; Physics, Atomic, Molecular & Chemical; QUANTUM DOTS; UP-CONVERSION EMISSION | Erscheinungsdatum: | 2005 | Herausgeber: | ELSEVIER | Journal: | CHEMICAL PHYSICS LETTERS | Volumen: | 407 | Ausgabe: | 1-3 | Startseite: | 124 | Seitenende: | 128 | Zusammenfassung: | High quality nanocrystals of hexagonal beta-NaGdF4 codoped with Yb3+ and Er3+ were synthesized by controlled precipitation in high boiling organic solvents and characterized by XRD and TEM. The particles of roughly spherical shape and a size of about 30 nm can be transparently dissolved in DMSO. Visible by eye green and red upconversion emission is observed upon near-infrared excitation at 10 233 cm(-1) (977 nm) with a laser power density of 2 kW cm(-2). (c) 2005 Elsevier B.V. All rights reserved. |
ISSN: | 00092614 | DOI: | 10.1016/j.cplett.2005.03.053 |
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