Deep photoluminescence band related to oxygen in gallium arsenide

Abstract
Temperature-dependent photoluminescence and photoluminescence excitation spectroscopy have been used to measure the 0.63-eV luminescence band present in O-doped semi-insulating GaAs. It is shown that the 0.63-eV band is related to the presence of O. The center responsible for the band forms a deep level similar to the main deep donor EL2. However, spark source mass spectrometry indicates that incorporation of O into GaAs is difficult.