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Surface and Bulk Photoconductivity of Cd1−xMnxTe

Published online by Cambridge University Press:  26 February 2011

H. Neff ,
K. Y. Lay ,
K. Park  and
K. J. Bachmann
H. Neff
Affiliation:
Departments of Chemistry, North Carolina State University Raleigh, North Carolina 27695-8204
K. Y. Lay
Affiliation:
Materials Engineering, North Carolina State University Raleigh, North Carolina 27695-8204
K. Park
Affiliation:
Physics, North Carolina State University Raleigh, North Carolina 27695-8204
K. J. Bachmann
Affiliation:
Departments of Chemistry, North Carolina State University Raleigh, North Carolina 27695-8204 Materials Engineering, North Carolina State University Raleigh, North Carolina 27695-8204
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Abstract

Double beam photoconductivity experiments are reported for the system Cd1−xMnxTe. The technique allows a separation of surface and bulk contributions, respectively. Bulk effects dominate for manganese rich material and reveal a sharp peak at the band gap energy while surface conductivity reveals a step function type spectral behavior. The growth of a native oxide on the surface causes an increase in the surface recombination velocity and a change from surface to bulk conduction. An oxide related trap state was discovered that is located at approximately 400 meV above the valence band edge.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 89: Symposium Q – Diluted Magnetic (Semimagnetic) Semiconductors , 1986 , 287
Copyright
Copyright © Materials Research Society 1987

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References

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