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Strain-free, ultra-high purity ZnSe layers grown by molecular beam epitaxy

Published online by Cambridge University Press:  31 January 2011

R. M. Park
Affiliation:
Department of Materials Science and Engineering, University of Florida, Gainesville, Florida 32611
C. M. Rouleau
Affiliation:
Department of Materials Science and Engineering, University of Florida, Gainesville, Florida 32611
M. B. Troffer
Affiliation:
Department of Materials Science and Engineering, University of Florida, Gainesville, Florida 32611
T. Koyama
Affiliation:
Tsukuba Research Laboratory, Nippon Sheet Glass Co. Ltd., 5-4 Tokodai, Tsukuba City, Ibaraki Pref. 300-26, Japan
T. Yodo
Affiliation:
Tsukuba Research Laboratory, Nippon Sheet Glass Co. Ltd., 5-4 Tokodai, Tsukuba City, Ibaraki Pref. 300-26, Japan
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Abstract

ZnSe layers have been grown by molecular beam epitaxy on high-purity, high-quality ZnSe wafers [(100) oriented] cut from ingots grown by the iodine vapor transport method. Photoluminescence (PL) analysis indicates the homoepitaxial ZnSe material to be of ultra-high purity as well as being strain-free relative to ZnSe/(100) GaAs layers which exhibit in-plane biaxial tension. The 10 K PL spectra recorded from homoepitaxial layers exhibit unsplit free- and donor-bound exciton transitions of comparable intensity together with a strong peak at 2.7768 eV believed to be the so-called Iv transition in relaxed ZnSc. The ultra-high purity nature of the homoepitaxial layers is attributed to the high purity of the substrate material in addition to the use of high purity Zn and Se source materials in this work.

Type
Materials Communications
Copyright
Copyright © Materials Research Society 1990

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References

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