Abstract
ABSTRACTThe properties of deep donor states (DX's centers) in III-V alloys are reviewed in relation to their influence on the device characteristics and limitations. Because of the systematic research being performed on AlGaAs, most of the information presented refers to such material. The electron thermal emission and capture properties of the DX's are then related to the DC and noise characteristics in heterojunction transistors. The optical properties of DX centers indicate a clear difference between unipolar and bipolar device performance at low temperatures. The technical efforts to avoid DX centers will also be described.
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