Electrical property improvements in In-doped dislocation-free GaAs by bulk annealing

Abstract
The effects of bulk annealing on the electrical properties of an In-doped dislocation-free semi-insulating GaAs are investigated. The crystal is grown by a fully encapsulated Czochralski method using the vertical magnetic field. It was found that the EL2 concentration increases after isochronal bulk annealing for 5 h from 800 to 1100 °C. In addition, the activation efficiency of implanted Si was found to correlate to the annealing behavior of the defect.