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Fabrication of Short Period ZnSe-GaAs Superlattices by MOVPE

Published online by Cambridge University Press:  25 February 2011

Mitsuru Funato ,
Shizuo Fujita  and
Shigeo Fujita
Mitsuru Funato
Affiliation:
Department of Electrical Engineering, Kyoto University, Kyoto 606–01, Japan
Shizuo Fujita
Affiliation:
Department of Electrical Engineering, Kyoto University, Kyoto 606–01, Japan
Shigeo Fujita
Affiliation:
Department of Electrical Engineering, Kyoto University, Kyoto 606–01, Japan
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Abstract

The growth condition and the structural properties of short period ZnSe-GaAs superlattices grown by metalorganic vapor phase epitaxy (MOVPE) are described. First, the growth condition was investigated. Superlattices (SLs) grown at 450°C have better structural property than those grown at 500°C. The thickness fluctuation of each constituent layer was investigated by means of the X-ray diffraction analysis, and it was indicated that the fluctuation in the fabricated structure was within 1 and 2 monomolecular layers for GaAs and ZnSe, respectively. Further optimization for growing thinner layers successfully brought SL with 25Å well and 140Å barrier layers. X-ray diffraction analysis and transmission electron microscopy (TEM) observation showed its good structural properties; high crystalline quality, high degree of lateral uniformity, well defined interfaces and strong periodicity. Another SL with 100 periods of ZnSe (33Å) / GaAs (25Å), which have smaller layer thickness and much larger number of periods compared with the SL mentioned above, could be also fabricated and the crystalline quality was found to be excellent by X-ray diffraction measurement.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 281: Symposium D – Semiconductor Heterostructures for Photonic and Electronic Applications , 1992 , 573
Copyright
Copyright © Materials Research Society 1993

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References

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