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Synthesis, Optical Properties, and Microstructure of Semiconductor Nanocrystals Formed by Ion Implantation

Published online by Cambridge University Press:  15 February 2011

J. D. Budai ,
C. W. White ,
S. P. Withrow ,
R. A. Zuhr  and
J. G. Zhu
J. D. Budai
Affiliation:
Oak Ridge National Laboratory, Oak Ridge, TN 37831–6030
C. W. White
Affiliation:
Oak Ridge National Laboratory, Oak Ridge, TN 37831–6030
S. P. Withrow
Affiliation:
Oak Ridge National Laboratory, Oak Ridge, TN 37831–6030
R. A. Zuhr
Affiliation:
Oak Ridge National Laboratory, Oak Ridge, TN 37831–6030
J. G. Zhu
Affiliation:
Oak Ridge National Laboratory, Oak Ridge, TN 37831–6030
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Abstract

High-dose ion implantation, followed by annealing, has been shown to provide a versatile technique for creating semiconductor nanocrystals encapsulated in the surface region of a substrate material. We have successfully formed nanocrystalline precipitates from groups IV (Si, Ge, SiGe), III-V (GaAs, InAs, GaP, InP, GaN), and II-VI (CdS, CdSe, CdSxSe1x, CdTe, ZnS, ZnSe) in fused silica, Al2O3 and Si substrates. Representative examples will be presented in order to illustrate the synthesis, microstructure, and optical properties of the nanostructured composite systems. The optical spectra reveal blue-shifts in good agreement with theoretical estimates of size-dependent quantum-confinement energies of electrons and holes. When formed in crystalline substrates, the nanocrystal lattice structure and orientation can be reproducibly controlled by adjusting the implantation conditions.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 452 , 1996 , 89
Copyright
Copyright © Materials Research Society 1997

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