Abstracts 2005

Abstract of Publication No. 511

Annina Aebischer, Stephan Heer, Daniel Biner, Karl Krämer, Markus Haase and Hans U. Güdel
Visible light emission upon near-infrared excitation in a transparent solution of nanocrystalline b-NaGdF4: Yb3+, Er3+
Chem. Phys. Lett. 407, 124-128 (2005)      Full Text (PDF)      DOI-Link     

Abstract: High quality nanocrystals of hexagonal b-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 10233 cm–1 (977 nm) with a laser power density of 2 kW cm–2.

Last modified: 13.12.11 by Gabriela Frei