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Electron Irradiation Doping with Carbon in Chemical Beam Epitaxy
Published online by Cambridge University Press: 26 February 2011
Abstract
Dissociation species produced by low-energy electron Irradiation of triethylgallium (TEGa) have been used as a carbon doping source during growth of GaAs by chemical beam epitaxy. Mass spectral analysis shows that TEGa dissociates at electron energies greater than 20 eV, and that the fragmentation pattern of TEGa consists of methyl radicals, ethyl radicals, and gallium compounds. In order to study the doping properties of carbon, carbon-doped GaAs films were grown under several conditions and were characterized by Hall measurements, photoluminecence spectrum, secondary Ion mass spectrometry, and double crystal X-ray diffraction. The hole carrier concentration could be varied up to ∼1020 cm−3, and the doping profile of carbon was well-controlled.
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- Copyright © Materials Research Society 1989