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- W2035636866 abstract "Deep levels in LPE GaAs were studied in relation to growth conditions. The residual deep levels in LPE layers are hole traps 0.50 and 0.65 eV above the top of the valence band. Their concentrations are of the order of 1013 cm-3 for growth temperatures between 650 and 840°C, and increase with increasing growth temperature. The activation energy of incorporation is about 0.7 eV, which is very close to that of an arsenic vacancy. It is also noted that their concentrations near the grown surface are independent of the growth temperature. This indicates that the hole traps undergo an annealing effect after the growth period. From the experimental results for Fe and oxygen doping, each impurity acts as a deep level only when it makes a complex defect with a gallium vacancy, otherwise they are shallow levels, The distribution coefficients at 750°C are 1 × 10-7 and 1.1 × 10-5 for the deep and Fe and the shallow acceptor, respectively." @default.
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- W2035636866 date "1978-12-01" @default.
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- W2035636866 title "Deep levels and growth conditions of LPE GaAs crystals" @default.
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- W2035636866 doi "https://doi.org/10.1016/0022-0248(78)90476-1" @default.
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