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Enhanced Luminescence Properties of Pulsed Laser-Deposited Eu:Y2O3 Thin Film Phosphors Using Diamond Buffer Layer

Published online by Cambridge University Press:  10 February 2011

K.G. Cho ,
D. Kumar ,
D.G. Lee ,
P.H. Holloway  and
R.K. Singh
K.G. Cho
Affiliation:
Department of Materials Science and Engineering, University of Florida, Gainesville, FL 32611Email: [email protected]
D. Kumar
Affiliation:
Department of Materials Science and Engineering, University of Florida, Gainesville, FL 32611Email: [email protected]
D.G. Lee
Affiliation:
Department of Materials Science and Engineering, University of Florida, Gainesville, FL 32611Email: [email protected]
P.H. Holloway
Affiliation:
Department of Materials Science and Engineering, University of Florida, Gainesville, FL 32611Email: [email protected]
R.K. Singh
Affiliation:
Department of Materials Science and Engineering, University of Florida, Gainesville, FL 32611Email: [email protected]
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Abstract

Europium-activated yttrium oxide (Eu:Y2O3) phosphor films have been grown in-situ on (100) bare silicon and diamond-coated silicon substrates using a pulsed laser deposition technique. Diamond-coated silicon substrates were prepared by hot filament chemical vapor deposition on (100) silicon wafer. Measurements of photoluminescence and cathodoluminescence properties of Eu:Y2O3 films showed that the films grown on diamond-coated silicon substrates are brighter than the films grown on bare silicon substrates. The improved brightness of the Eu:Y2O3 films on diamond-coated silicon substrates is attributed to reduced internal reflection and enhanced scattering of incident beam with lattice. These effects are primarily brought about by the presence of a rough diamond buffer layer between the phosphor film and substrate. Oxygen environment during deposition is necessary for better crystallinity but excess oxygenation of the Eu:Y2O3 films during cooling degrades the brightness of the films.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 508: Symposium B – Flat Panel Display Materials - 1998 , January 1998 , 301
Copyright
Copyright © Materials Research Society 1998

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