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The Possible Mechanism of Excitation of the f - f Emission from Er-O Clusters in Silicon

Published online by Cambridge University Press:  10 February 2011

V. F. Masterov  and
L. G. Gerchikov
V. F. Masterov
Affiliation:
Department of Experimental Physics, St.Petersburg State Technical University, St.Petersburg 195251, Russia, masterov@tuexph.spb.su
L. G. Gerchikov
Affiliation:
Department of Experimental Physics, St.Petersburg State Technical University, St.Petersburg 195251, Russia, masterov@tuexph.spb.su
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Abstract

The Er2O3 quantum dot (cluster) with dimensions about 1.2nm in silicon is discussed as the possible source of the Er related emission in Si:Er,O, excited by photogenerated carriers or in a light-emitting diodes (LED) at forward bias. This quantum dot is represented as a spherical quantum well 0.9eV in depth. The electron level with energy about 0.15eV below the bottom of the silicon conduction band plays role of an electron trap. The trapped electron interacts with a hole in valence band of silicon forming “indirect” exciton bonded to quantum well. The energy is transferred to f - shell of erbium by the Auger electron - hole recombination.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 422: Symposium D – Rare-Earth Doped Semiconductors II , 1996 , 227
Copyright
Copyright © Materials Research Society 1996

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