Title :
Organic/inorganic optical nanocomposite with highly-doped rare-earth nanoclusters: novel phosphors for white LEDs
Author :
Mataki, Hiroshi ; Fukui, Toshimi
Author_Institution :
KRI, Inc., Kyoto, Japan
Abstract :
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.
Keywords :
cerium; europium; light emitting diodes; metal clusters; nanocomposites; nanotechnology; optical materials; organic-inorganic hybrid materials; phosphors; photoluminescence; terbium; acrylic resin; blue luminescence; cerium-based nanocluster; concentration quenching; europium-based nanocluster; green luminescence; highly-doped rare-earth nanoclusters; multiphonon relaxation; organic/inorganic optical nanocomposite; phosphors; photoluminescence spectra; red luminescence; solubility; terbium-based nanocluster; white LED; Active matrix organic light emitting diodes; Aluminum; Cerium; Counting circuits; Light emitting diodes; Luminescence; Nanotechnology; Optical fiber amplifiers; Optical fiber dispersion; Phosphors;
Conference_Titel :
Nanotechnology, 2005. 5th IEEE Conference on
Print_ISBN :
0-7803-9199-3
DOI :
10.1109/NANO.2005.1500645
