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The Enabling Role of Surface Passivation in Visible Photoluminescence from Si Nanoparticles

Published online by Cambridge University Press:  21 February 2011

A.A. Seraphin ,
E. Werwa ,
L.A. Chiu  and
K.D. Kolenbrander
A.A. Seraphin
Affiliation:
Department of Materials Science and Engineering, Massachusetts Institute of Technology Cambridge, MA 02139.
E. Werwa
Affiliation:
Department of Materials Science and Engineering, Massachusetts Institute of Technology Cambridge, MA 02139.
L.A. Chiu
Affiliation:
Intel Corporation, Santa Clara, CA 95052.
K.D. Kolenbrander
Affiliation:
Department of Materials Science and Engineering, Massachusetts Institute of Technology Cambridge, MA 02139.
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Abstract

Silicon nanocrystallites have been studied in a variety of passivating environments to study the role of surface passivation in visible light emission from the particles. Thin films of Si nanocrystallites have been deposited by a laser ablation supersonic expansion technique. The films show significant room temperature photoluminescence (PL) behavior only after processing to achieve surface passivation. Passivation effects on light emission are studied through PL emission spectroscopy on clusters in the gas phase, as well as films in a variety of passivating media. The intensity of PL emission seems to scale with the extent of surface passivation, but the specific nature of the passivating species is not critical in defining the wavelength of emitted light.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 318: Symposium Ca – Interface Control of Electrical, Chemical, and Mechanical Properties , 1993 , 433
Copyright
Copyright © Materials Research Society 1994

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References

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