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Picosecond Photomodulation Study of Nanocrystalline Hydrogenated Silicon

Published online by Cambridge University Press:  21 February 2011

M. Wraback ,
Lingrong Chen ,
J. Tauc  and
Z. Vardeny
M. Wraback
Affiliation:
Brown University, Department of Physics and Division of Engineering, Providence, Rhode Island 02912
Lingrong Chen
Affiliation:
Brown University, Department of Physics and Division of Engineering, Providence, Rhode Island 02912
J. Tauc
Affiliation:
Brown University, Department of Physics and Division of Engineering, Providence, Rhode Island 02912
Z. Vardeny
Affiliation:
University of Utah, Department of Physics, Salt Lake City, Utah 84112
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Abstract

We have extended our photomodulation studies of nc-Si:H to the picosecond time domain. We measured the decays of photoinduced reflectivity with 100fs temporal resolution as a function of light intensity. Comparison with the data obtained on a-Si:H and c-Si indicates that ultrafast trapping and recombination processes are mainly the properties of the amorphous phase. It has also been observed that nc-Si:H is unstable under high illumination.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 164: Symposium H – Materials Issues in Microcrystalline Semiconductors , 1989 , 223
Copyright
Copyright © Materials Research Society 1990

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