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Yoshikazu Matsui,Hiroshi Horikawab,Mitsunobu Iwasaki,박원규 한양대학교 세라믹연구소 2011 Journal of Ceramic Processing Research Vol.12 No.3
Nanometre-sized yttrium aluminum garnet doped with Ce3+ (YAG : Ce) crystals were prepared at a low temperatures by use of an environmentally-friendly wet process, in which an alcohol-water mixture with metal salts is refluxed without any addition of surfactants or adsorbing ligands. All of the YAG : Ce particles with 0.1-10 mol% of Ce3+ ions were found to be nanocrystals. YAG : Ce nanocrystals emitted at a 532 nm wavelength with the excitation light at 454 nm. The highest quantum efficiency was achieved at a very small Ce3+ content of 0.3 mol %. The decay curve of the fluorescence consisted of the three exponential terms, and the average fluorescence lifetime was around 110 ns irrespective of the Ce3+ concentration.