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Hydrogen Passivation Effects in Heteroepitaxial InSb Grown on GaAs by Lpmocvd

Published online by Cambridge University Press:  22 February 2011

Byueng-Su Yoo
Affiliation:
Electronics and Telecommunications Research Institute P.O. Box 8, Daeduk Science Town, Daejeon, Korea
Sang-Gi Kim
Affiliation:
Electronics and Telecommunications Research Institute P.O. Box 8, Daeduk Science Town, Daejeon, Korea
El-Hang Lee
Affiliation:
Electronics and Telecommunications Research Institute P.O. Box 8, Daeduk Science Town, Daejeon, Korea
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Abstract

The effects of hydrogen plasma exposure upon electron Hall mobilities in InSb heteroepitaxial film grown on GaAs substrate have been investigated. After exposure to a hydrogen plasma at 250°C, the electron Hall mobility is significantly increased at low temperatures and the temperature dependence of the mobility is reduced. For the film with a broad x-ray rocking-curve width, 4 h-hydrogen plasma exposure can give rise to the enhancement of the mobility up to 6 times at low temperature. The mobility for the film with a narrow line width is enhanced around 1.5 times. These enhanced mobilities are nearly restored by 350°C rapid thermal annealing. The enhancement of the mobility due to hydrogenation is attributed to the satisfaction of the dangling bonds generated by the misfit dislocations.

Type
Research Article
Copyright
Copyright © Materials Research Society 1994

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