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Porous Silicon Luminescence Study by Imaging Methods: Relationship to Pore Dimensions

Published online by Cambridge University Press:  21 February 2011

Anna Kontkiewicz ,
Andrzej M. Kontkiewicz ,
Sidhartha Sen ,
Marek Wesolowski ,
Jacek Lagowski ,
Piotr Edelman  and
Tomasz Kowalewski
Anna Kontkiewicz
Affiliation:
Center for Microelectronics Research, University of South Florida, Tampa, FL 33620
Andrzej M. Kontkiewicz
Affiliation:
Center for Microelectronics Research, University of South Florida, Tampa, FL 33620
Sidhartha Sen
Affiliation:
Center for Microelectronics Research, University of South Florida, Tampa, FL 33620
Marek Wesolowski
Affiliation:
Center for Microelectronics Research, University of South Florida, Tampa, FL 33620
Jacek Lagowski
Affiliation:
Center for Microelectronics Research, University of South Florida, Tampa, FL 33620
Piotr Edelman
Affiliation:
Semiconductor Diagnostics, Tampa, FL 33610
Tomasz Kowalewski
Affiliation:
Chemistry Dept., Washington University, St. Louis, MO 63130
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Abstract

In a photoluminescence and surface photovoltage study of porous silicon films with crystallite dimensions assessed with the Atomic Force Microscope, we have found cases when the blue shifts of the luminescence spectrum and the optical absorption edge take place upon increasing crystallite dimensions, which is contrary to quantum size effects. Fourier transform infrared spectroscopy analysis of these samples shows significant differences in hydrogen and oxygen bonding, which imply that the origin of the luminescence is of chemical nature. Our results show that porous silicon luminescence is not a consequence of one mechanism, but rather results from several mechanisms with contributions depending on the chemistry and structure of porous silicon.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 332: Symposium U – Determining Nanoscale Physical Properties of Materials by Microscopy and Spectroscopy , 1994 , 201
Copyright
Copyright © Materials Research Society 1994

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References

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