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Ion Beam Enhanced Formation and Luminescence of Si Nanoclusters from a-SiOx

Published online by Cambridge University Press:  17 March 2011

Yohan Sun ,
Se-Young Seo ,
Jung H. Shin ,
T. G. Kim ,
C. N. Whang  and
J. H. Song
Yohan Sun
Affiliation:
Dept. of Physics, Korea Advanced Institute of Science and Technology (KAIST) 373-1 Kusung-dong, Yusung-Gu, Taejon Korea
Se-Young Seo
Affiliation:
Dept. of Physics, Korea Advanced Institute of Science and Technology (KAIST) 373-1 Kusung-dong, Yusung-Gu, Taejon Korea
Jung H. Shin
Affiliation:
Dept. of Physics, Korea Advanced Institute of Science and Technology (KAIST) 373-1 Kusung-dong, Yusung-Gu, Taejon Korea
T. G. Kim
Affiliation:
Dept. of Physics, Yonsei University, Seoul, Korea
C. N. Whang
Affiliation:
Dept. of Physics, Yonsei University, Seoul, Korea
J. H. Song
Affiliation:
Advanced Analysis Center, Korea Institute of Science and Technology, Seoul, Korea
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Abstract

The effect of ion beams on the formation of Si nanoclusters from a-SiOx films and their luminescence properties is investigated. a-SiOx films with Si content ranging from 33 to 50 at. % were deposited by Electron Cyclotron Resonance Plasma Enhanced Chemical Vapor Deposition (ECR-PECVD) of SiH4 and O2. Prior to anneal, some samples were implanted with 380 keV Si to a dose ranging from 5.7 × 1014 cm−2 to 5.7 × 1016 cm−2. All films were rapid thermal annealed under flowing Ar environment, and hydrogenated after anneals to passivate defects and to enhance the luminescence of Si nanoclusters. For films with Si content less than 40 at. %, ion beam slightly reduces the photoluminescence (PL) intensity and induces a slight blueshift of the luminescence. For films with Si content greater than 40 at. %, ion beam greatly increases the PL intensity. Based on the effect of the ion beams dose and the ion specie, we propose that ion beams damage greatly promotes nucleation of small Si clusters from the a-SiOx matrix.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 647: Symposium O – Ion Beam Synthesis & Processing of Advanced Materials , 2000 , O12.3/R7.3
Copyright
Copyright © Materials Research Society 2001

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