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Luminescent Colloidal SI Suspensions from Porous SI

Published online by Cambridge University Press:  15 February 2011

Julie L. Heinrich ,
Corrine L. Curtis ,
Grace M. Credo ,
Karen L. Kavanagh  and
Michael J. Sailor
Julie L. Heinrich
Affiliation:
Departments of Chemistry and Electrical & Computer Engineering
Corrine L. Curtis
Affiliation:
Departments of Chemistry and Electrical & Computer Engineering
Grace M. Credo
Affiliation:
Departments of Chemistry and Electrical & Computer Engineering
Karen L. Kavanagh
Affiliation:
The University of California at San Diego, La Jolla, CA 92093-0407.
Michael J. Sailor
Affiliation:
Departments of Chemistry and Electrical & Computer Engineering
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Abstract

A procedure for generating colloidal suspensions of Si exhibiting luminescence, attributed to quantum confinement effects, is described. Samples of n- or p-type Si, that have been electrochemically etched to form porous Si, can be ultrasonically dispersed into methylene chloride, acetonitrile, methanol, toluene, or water solvents, forming a suspension of fine Si particles that luminesce. Transmission electron microscopy analyses show the Si particles to have irregular shapes, with diameters ranging from many microns to nanometers. Luminescent, composite polystyrene/Si films can be made by the addition of polystyrene to a toluene suspension of the Si nanoparticles and casting of the resulting solution.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 256: Symposia AA – Light Emission from Silicon , 1991 , 131
Copyright
Copyright © Materials Research Society 1992

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References

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