Violet/blue emission from epitaxial cerium oxide films on silicon substrates

Violet/blue emission from epitaxial cerium oxide films on silicon substrates

Violet/blue photoluminescence was observed from epitaxial cerium oxide films on silicon substrates. The films were deposited on silicon (111) substrates under ultrahigh vacuum conditions using pulsed laser ablation of a cerium oxide target and treated by rapid thermal annealing in argon. High resolu...

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Veröffentlicht in:Applied Physics Letters 1997-03, Vol.70 (13), p.1647-1649
Hauptverfasser: Morshed, A. H., Moussa, M. E., Bedair, S. M., Leonard, R., Liu, S. X., El-Masry, N.
Format: Artikel
Sprache:eng
Schlagworte:
ANNEALING
CERIUM OXIDES
CRYSTAL DEFECTS
DEPOSITION
EPITAXY
LASER RADIATION
MATERIALS SCIENCE
PHASE STUDIES
PHOTOLUMINESCENCE
THIN FILMS
TRANSMISSION ELECTRON MICROSCOPY
X-RAY DIFFRACTION
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Zusammenfassung:Violet/blue photoluminescence was observed from epitaxial cerium oxide films on silicon substrates. The films were deposited on silicon (111) substrates under ultrahigh vacuum conditions using pulsed laser ablation of a cerium oxide target and treated by rapid thermal annealing in argon. High resolution transmission electron microscopy and x-ray diffraction measurements indicated the formation of a single crystal cerium oxide phase Ce6O11 different from CeO2 in the annealed films. The emission might be due to charge transfer transitions from the 4f band to the valence band of the oxide.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.118658