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Nanoparticles of a doped oxide phosphor prepared by direct-spray pyrolysis

Published online by Cambridge University Press:  01 December 2004

I. Wuled Lenggoro ,
Yoshifumi Itoh ,
Kikuo Okuyama  and
Tae Oh Kim
I. Wuled Lenggoro
Affiliation:
Department of Chemical Engineering, Graduate School of Engineering, Hiroshima University, Higashi-Hiroshima 739-8527, Japan
Yoshifumi Itoh
Affiliation:
Department of Chemical Engineering, Graduate School of Engineering, Hiroshima University, Higashi-Hiroshima 739-8527, Japan
Kikuo Okuyama*
Affiliation:
Department of Chemical Engineering, Graduate School of Engineering, Hiroshima University, Higashi-Hiroshima 739-8527, Japan
Tae Oh Kim
Affiliation:
School of Civil and Environmental Engineering, Kumoh National University of Technology, Kyungbuk 730-710, Korea
*
a)Address all correspondence to this author. e-mail: okuyama@hiroshima-u.ac.jp
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Abstract

A gas-phase synthesis route based on spray pyrolysis with a residence/heating time of less than 0.1 s was designed to directly prepare Eu-doped Y2O3 phosphor nanoparticles. The average size of the phosphor particles decreased from the submicron size to around 10 nm when the concentration of the starting solution was increased. By increasing the operating temperature, from 1500 to 1700 °C, the submicron-particles were converted into a nano-particle phosphor, and their photoluminescence intensities at 611 nm (254-nm excitation) were greatly improved. This synthesis procedure has considerable potential for preparing a variety of doped luminescent nanoparticles without the need for post-treatment processing.

Keywords

LuminescenceNanoparticleSpray pyrolysis
Type
Articles
Information
Journal of Materials Research , Volume 19 , Issue 12 , December 2004 , pp. 3534 - 3539
Copyright
Copyright © Materials Research Society 2004

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References

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