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Effects of CdTe/ZnTe Strained-Layer Superlattices on Heteroepitaxial CdTe Films Grown by Hwe

Published online by Cambridge University Press:  25 February 2011

I. Sugiyama ,
A. Hobbs ,
O. Ueda ,
K. Shinohara  and
H. Takigawa
I. Sugiyama
Affiliation:
Fujitsu Laboratories Ltd., 10-1 Morinosato-Wakamiya, Atsugi, 243-01, Japan
A. Hobbs
Affiliation:
Fujitsu Laboratories Ltd., 10-1 Morinosato-Wakamiya, Atsugi, 243-01, Japan
O. Ueda
Affiliation:
Fujitsu Laboratories Ltd., 10-1 Morinosato-Wakamiya, Atsugi, 243-01, Japan
K. Shinohara
Affiliation:
Fujitsu Laboratories Ltd., 10-1 Morinosato-Wakamiya, Atsugi, 243-01, Japan
H. Takigawa
Affiliation:
Fujitsu Laboratories Ltd., 10-1 Morinosato-Wakamiya, Atsugi, 243-01, Japan
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Abstract

CdTe-ZnTe strained-layer superlattices (SLSs) were used to reduce the density of threading dislocations in CdTe epilayers on GaAs substrates. Three types of SLSs were characterized by double-crystal X-ray rocking curves and transmission electron microscopy (TEM). The SLS blocked dislocations when the thickness of both the individual layers and the total SLS does not exceed the critical layer thicknesses. TEM images of both cross-section and plan-view show that the twothirds of the maximum number of threading dislocations were blocked by the SLS and, on average, half of these were blocked. While, in the other SLSs, new defects (threading dislocations and/or stacking faults) were generated in layers that exceeded the critical thickness. These defects offset the effect of any dislocation bending.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 221: Symposium C – Heteroepitaxy of Dissimilar Materials , 1991 , 471
Copyright
Copyright © Materials Research Society 1991

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References

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