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Control of Silicon Nanocrystallite Luminescence Behavior Through Surface Treatments

Published online by Cambridge University Press:  15 February 2011

A. A. Seraphin ,
S.-T. Ngiam  and
K. D. Kolenbrander
A. A. Seraphin
Affiliation:
Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139
S.-T. Ngiam
Affiliation:
Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139
K. D. Kolenbrander
Affiliation:
Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139
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Abstract

The visible photoluminescence from thin films of silicon nanocrystallites produced by a pulsed laser ablation supersonic expansion source has been studied to determine the role of particle surface and size in the emission behavior. Variation of nanocrystallite size and surface through a variety of chemical treatments and processing steps has shown that the visible emission can be explained using only a simple quantum confinement model. Particle size has been reduced through a series of acid etch and reoxidation cycles and compared to sample emission wavelength. The role of surface species in determining emission behavior has been studied by chemically altering the surfaces and comparing their surface properties as determined by x-ray photoelectron spectroscopy to their photoluminescence behavior. Nanocrystallite size controls the emission energy, while surface passivation only determines emission intensity, through control of excited carrier recombination pathways.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 405: Symposium K – Surface/Interface and Stress Effects in Electronic Materials Nanostructures , 1995 , 277
Copyright
Copyright © Materials Research Society 1996

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