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Organic/inorganic optical nanocomposite with highly-doped rare-earth nanoclusters: novel phosphors for white LEDs

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2 Author(s)
Mataki, H. ; KRI, Inc., Kyoto, Japan ; Fukui, T.

Organic/inorganic optical nanocomposite with highly-doped rare-earth (RE) nanoclusters has been developed. The nanocluster, having RE-metal (RE-M) complex alkoxide structure (RE|M(OR)4|3), was designed to suppress nonradiative transitions due both to multi-phonon relaxation and concentration quenching while maintaining preferable solubility in organic materials. Based on this concept, europium (Eu3+)-, terbium (Tb3+)-, and cerium (Ce3+)-based nanoclusters (RE|Al(OBu5)4|3) dispersed in propyleneglycol α-monomethyl ether, each of which exhibiting red, green, and blue luminescence, respectively, were synthesized. Photoluminescence spectra suggest that these nanoclusters can be good candidates for RGB-type white LEDs. Further, acrylic-resin-based organic/inorganic nanocomposite was successfully fabricated using Eu3+|Al(OBu5)4|3.

Published in:

Nanotechnology, 2005. 5th IEEE Conference on

Date of Conference:

11-15 July 2005

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