Annealing effect in Si-doped GaAs and AlGaAs layers grown by MBE

Abstract
The effect of annealing on Si-doped GaAs and Al0·3Ga0·7As layers grown by MBE has been studied. In the heavily doped samples, the donor concentration decreased considerably and the broad luminescence characteristic of the SA centre reported in bulk n-GaAs appeared. The results suggest evidence that annealing converts some of the Si donors into complexes like the SA centre, which does not act as a donor.

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