Effects of citric acid additive on photoluminescence properties of YAG:Ce3+ nanoparticles synthesized by glycothermal reaction

R. Asakura, T. Isobe, K. Kurokawa, T. Takagi, H. Aizawa, M. Ohkubo

研究成果: Article

39 引用 (Scopus)

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We synthesize Y3Al5O12:Ce3+ (YAG:Ce3+) nanoparticles in the presence of citric acid by glycothermal method. Fourier transform infrared absorption spectroscopy measurement indicates that the intensity of the peak corresponding to carboxyl groups coordinating to the nanoparticles increases with increasing amount of citric acid. At the same time, the primary particle diameter decreases from 10.2 to 4.0 nm. In addition, the internal quantum efficiency of the photoluminescence (PL) due to the 4f-5d transition of Ce3+ increases from 22.0% to 40.1% with increasing amount of citric acid. Two kinds of PL decay lifetimes, 16-26 and 72-112 ns, are detected for YAG:Ce3+ nanoparticles, whereas the micron sized YAG:Ce3+ bulk shows the lifetime of 57 ns. We discuss these phenomena from the aspects of the coordination of citric acid and the incorporation of Ce3+ ions into the nanoparticles.

元の言語English
ページ(範囲)416-422
ページ数7
ジャーナルJournal of Luminescence
127
発行部数2
DOI
出版物ステータスPublished - 2007 12 1

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ASJC Scopus subject areas

  • Biophysics
  • Biochemistry
  • Chemistry(all)
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics

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