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Controllable Multicolor Upconversion Luminescence of Lanthanide Doped NaGdF4 Nanocrystals Through Single Laser Excitation at 980 nm

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Abstract:

Room temperature multicolor Upconversion (UC) luminescence in Yb3+, Tm3+, Er3+ ions doped NaGdF4 nanocrystals have been successfully synthesized by a hydrothermal method. As-prepared nanocrystals are highly crystalline and well-dispersed in cyclohexane to form stable and clear colloidal solutions, which demonstrates strong emission properties with a single laser excitation at 980 nm. The multicolor light consists of blue, green, and red UC radiations that correspond to transitions 1G43H6 of Tm3+, 2H11/2/4S3/24I15/2, and 4F9/24I15/2 of Er3+ ions, respectively. The UC mechanisms were proposed based on spectral, kinetic, and pump power dependence analyses.

Keywords: LANTHANIDE IONS; NAGDF4 NANOCRYSTALS; UPCONVERSION LUMINESCENCE

Document Type: Research Article

DOI: http://dx.doi.org/10.1166/jnn.2011.5278

Publication date: November 1, 2011

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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