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Optical Analysis of Plasma Enhanced Crystallization of Amorphous Silicon Films

Published online by Cambridge University Press:  09 August 2011

L. Montès ,
L. Tsybeskov ,
P. M. Fauchet ,
K. Pangal ,
J. C. Sturm  and
S. Wagner
L. Montès
Affiliation:
Laboratoire de Spectrométrie Physique, CNRS (UMR 5588), 38402 Saint-Martin d'Hères Cedex, FRANCE, Laurent.MONTES@ujf-grenoble.fr
L. Tsybeskov
Affiliation:
ECE Department, University of Rochester, Rochester, NY 14627.
P. M. Fauchet
Affiliation:
Laboratoire de Spectrométrie Physique, CNRS (UMR 5588), 38402 Saint-Martin d'Hères Cedex, FRANCE, Laurent.MONTES@ujf-grenoble.fr
K. Pangal
Affiliation:
ECE Department, Princeton University, Princeton, NJ 08544.
J. C. Sturm
Affiliation:
ECE Department, Princeton University, Princeton, NJ 08544.
S. Wagner
Affiliation:
ECE Department, Princeton University, Princeton, NJ 08544.
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Abstract

Low-temperature crystallization of a-Si is important for display and Silicon-On- Insulator (SOT) technologies. We present optical characterization (Raman scattering and photoluminescence) of H2 and O2 plasma enhanced crystallization of a-Si:H films. H2 plasma treatment is shown to be the most efficient, leading to larger grain sizes, and both H2 and O2 plasma lead to visible photoluminescence (PL). Recently, the PL of re-crystallized a-Si films has been explained in terms of quantum confinement [1]. The mean size of the crystallites in our re-crystallized films is determined by Raman scattering for different treatments parameters. No correlation between size and the photon energy of the visible emission is found. However, we can clearly distinguish between the PL from purely amorphous and re-crystallized a-Si:H films: Their PL temperature dependence and spectra are very different. The origin of the visible PL in re-crystallized thin Si films is discussed.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 536: Symposium F – Microcrystalline & Nanocrystalline Semiconductors - 1998 , 1998 , 505
Copyright
Copyright © Materials Research Society 1999

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