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Proceedings Paper

Formation of rare-earth upconverting nanoparticles using laser vaporization controlled condensation
Author(s): Garry Glaspell; James R. Wilkins; John Anderson; M. Samy El-Shall
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Paper Abstract

Rare earth doped upconverting nanoparticles have been synthesized via laser vaporization controlled condensation (LVCC) and their photoluminescence properties were characterized using 980 nm laser diode excitation. This procedure is highly tunable, specifically by increasing the Yb3+ to Er3+ concentration the observed green emission decreases and the observed red emission increases. We have also shown that nearly equal peaks of blue, green and red emissions producing a virtually white upconverter could be synthesized by appropriately mixing Tm3+, Ho3+, and Er3+. We have also investigated the upconversion efficiency in a variety of lattices including Y2O3, Gd2O3 and La2O3. TEM confirmed that the as-formed particles were ~ 10 nm in size and XRD indicated that the overall crystal structure was predominately cubic.

Paper Details

Date Published: 1 May 2008
PDF: 7 pages
Proc. SPIE 6940, Infrared Technology and Applications XXXIV, 69403B (1 May 2008); doi: 10.1117/12.778030
Show Author Affiliations
Garry Glaspell, Virginia Commonwealth Univ. (United States)
U.S. Army Research and Development Ctr. (United States)
James R. Wilkins, Virginia Commonwealth Univ. (United States)
John Anderson, U.S. Army Research and Development Ctr. (United States)
M. Samy El-Shall, Virginia Commonwealth Univ. (United States)

Published in SPIE Proceedings Vol. 6940:
Infrared Technology and Applications XXXIV
Bjørn F. Andresen; Gabor F. Fulop; Paul R. Norton, Editor(s)

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