Effects of Zn cross diffusion on the properties of n (AlxGa1−xAs) -p (GaAs) heterojunctions

Abstract
Properties of n (AlxGa1−xAs) ‐p (GaAs) heterojunctions grown by liquid‐phase epitaxial (LPE) techniques were investigated. It was found that an energy barrier in the form of a ’’spike’’ can be formed at the interface as a result of Zn out diffusion from the GaAs layer. When Ge was substituted for Zn as the p‐type dopant, no such energy barrier was observed. The results are interpreted in terms of the graded‐gap heterojunction model.

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