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Capacitance Transient Analysis of Mbe Grown Gaas on Silicon Substrates

Published online by Cambridge University Press:  28 February 2011

G. F. Burns ,
T. C. Chong  and
C. G. Fonstad
G. F. Burns
Affiliation:
Department of Electrical Engineering and Computer Science Massachusetts Institute of Technology Cambridge, Massachusetts 02139
T. C. Chong
Affiliation:
Department of Electrical Engineering and Computer Science Massachusetts Institute of Technology Cambridge, Massachusetts 02139
C. G. Fonstad
Affiliation:
Department of Electrical Engineering and Computer Science Massachusetts Institute of Technology Cambridge, Massachusetts 02139
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Abstract

Capacitance transient spectroscopy has been applied to identify deep levels associated with heteroepitaxial GaAs grown on silicon. Results from p+n diode test structures reveal creation of the electron trap EL2 and a high density of hole states in the bandgap. This is the first reported observation of hole traps in MBE GaAs on Si. The activation behavior of the electron and hole signal peaks fits the signature of two different charge states associated with EL2, a native point defect complex seen in MOCVD, VPE, and bulk-grown GaAs, but not usually observed in MBE grown GaAs. Interstingly, the spectra seen show many similarities with earlier deep level transient spectroscopy (DLTS) observations on plastically deformed GaAs.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 116 , 1988 , 213
Copyright
Copyright © Materials Research Society 1988

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