Properties of carbon-doped low-temperature GaAs and InP grown by solid-source molecular-beam epitaxy using CBr4
نویسندگان
چکیده
Carbon-doped GaAs and InP grown at low temperatures by molecular-beam epitaxy contain a high concentration of antisite defects which gives rise to ultrafast carrier trapping time and desirable radiation-hard properties. The use of CBr4 as the dopant source introduced significant bromine incorporation during low-temperature ~LT! growth. Incomplete dissociation of the CBr4 molecules gives rise to the formation of C–Br complexes and results in a reduction of electrically active carbon concentration. In this work, we present our studies on the incorporation mechanism of C and Br in LT-GaAs and report on the effect of carbon and bromine incorporation on carrier lifetime and concentration of arsenic antisite defects. Preliminary results on LT-InP:C characterization are also presented. © 2000 American Vacuum Society. @S0734-211X~00!01803-5#
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