Comparison of Ultraviolet Upconversion Luminescence Between Thin Film and Bulk of Calcium Fluoride Co-Doped with Yb3+/Tm3+ Ions

Authors: Jiang, Tao; Qin, Weiping; Ding, Fuheng

Source: Journal of Nanoscience and Nanotechnology, Volume 10, Number 3, March 2010 , pp. 2013-2016(4)

Publisher: American Scientific Publishers

Buy & download fulltext article:

OR

Price: $113.00 plus tax (Refund Policy)

Abstract:

A calcium fluoride thin film co-doped with Yb3+/Tm3+ was deposited on Si substrates by the spin-coating method using trifluoroacetic acid as a fluorine source. The scanning electron microscopy (SEM) image of the sample showed that a thin film with some cracks was formed. After annealing, the cracks disappeared, and the film became thinner. The roughness of the thin film was about 150 nm, which was confirmed by atomic force microscopy (AFM). Moreover, the upconversion luminescence properties of the thin film after annealing were studied. Under infrared light excitation, strong ultraviolet (UV) upconversion luminescence of the thin film was observed. To compare the upconversion properties, Yb3+/Tm3+ co-doped calcium fluoride bulk material that has the same components with the thin film was also synthesized. Compared with the bulk material, the UV upconversion emission of thin film was more intense. The mechanism of UV upconversion was determined by analyzing the upconversion spectra. The decrease in the size of the CaF2 Yb3+/Tm3+ particles to the nano-scale in the thin film contributed to the enhancement of the UV UC luminescence.

Keywords: NANOPARTICLES; THIN FILM; UPCONVERSION

Document Type: Research Article

DOI: http://dx.doi.org/10.1166/jnn.2010.2114

Publication date: March 1, 2010

More about this publication?
  • 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.
  • Editorial Board
  • Information for Authors
  • Subscribe to this Title
  • Terms & Conditions
  • ingentaconnect is not responsible for the content or availability of external websites
Related content

Tools

Key

Free Content
Free content
New Content
New content
Open Access Content
Open access content
Subscribed Content
Subscribed content
Free Trial Content
Free trial content

Text size:

A | A | A | A
Share this item with others: These icons link to social bookmarking sites where readers can share and discover new web pages. print icon Print this page