Samy. Virginia Commonwealth Univ. (USA) and U.S. Army Research and
Development Ctr., USA. Proceedings of SPIE (2008), 6940(Pt. 1,
Infrared Technology and Applications XXXIV), 69403B-69403B-7.
Publisher: Society of Photo-Optical Instrumentation Engineers, CODEN:
PSISDG ISSN: 0277-786X. Journal written in English. AN
2008:697307 CAPLUS
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+ concn. the obsd. green emission decreases
and the obsd. 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.
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