Articles
  • Preparation of YAG : Ce nanocrystals by an environmentally friendly wet process Effect of Ce3+ concentration on photoluminescent property
  • Yoshikazu Matsuia, Hiroshi Horikawab, Mitsunobu Iwasakia,b,* and Wonkyu Parkc
  • aDepartment of Applied Chemistry, School of Science and Engineering, Kinki University, 3-4-1 Kowakae, Higashi-Osaka-shi, Osaka 577-8502, Japan bLiaison Center, Kinki University, 3-4-1 Kowakae,Higashi-Osaka-shi,Osaka 577-8502, Japan cDepartment of Material Engineering, Paichai University, Dome-dong, Seog-gu, Daejeon, 302-735, Korea
Abstract
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.

Keywords: YAG, Environmentally-friendly wet process, Nanocrystals, Quantum efficiency, Ce3+ concentration, Fluorescence lifetime

This Article

  • 2011; 12(3): 348-351

    Published on Jun 30, 2011