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Preparation of nonaggregated Y2O3 : Eu phosphor particles by spray pyrolysis method

Published online by Cambridge University Press:  31 January 2011

Yun Chan Kang ,
Seung Bin Park ,
I. Wuled Lenggoro  and
Kikuo Okuyama
Yun Chan Kang
Affiliation:
Department of Chemical Engineering, Hiroshima University, Higashi-Hiroshima 739-8527, Japan
Seung Bin Park
Affiliation:
Department of Chemical Engineering, Korea Advanced Institute of Science and Technology, 373-1 Kusong-dong, Yusong-gu, Taejon 305-701 Korea
I. Wuled Lenggoro
Affiliation:
Department of Chemical Engineering, Hiroshima University, Higashi-Hiroshima 739-8527, Japan
Kikuo Okuyama*
Affiliation:
Department of Chemical Engineering, Hiroshima University, Higashi-Hiroshima 739-8527, Japan
*
b)Address all correspondence to this author. e-mail: okuyama@ipc.hiroshima-u.ac.jp
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Abstract

Y2O3 : Eu phosphor particles were directly prepared by a spray pyrolysis method. Photoluminescence, morphology, and crystallinity of the as-prepared particles were investigated. The as-prepared particles above 600 °C had good crystallinity, and the crystallinity increased with increasing reactor temperatures. The particles had spherical morphology and were nonaggregated. The mean size of the particles increased from 0.34 to 1.2 µm when the solution concentration was increased from 0.03 to 1 M. The as-prepared particles had good red emission without annealing at high temperatures when excited with uv light. The main emission peak was 612 nm. The brightness of the as-prepared particles increased with increasing temperatures because of good activation and crystallization at high temperatures.

Type
Articles
Information
Journal of Materials Research , Volume 14 , Issue 6 , June 1999 , pp. 2611 - 2615
Copyright
Copyright © Materials Research Society 1999

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