Complexes and their Effects on III—V Compounds
The degree and type of activation of any given impurity in III–V compounds is noted to be significantly affected by the presence of other selected impurities within the host material. Certain impurity combinations are believed to favour the formation of electrically active complexes; other complexes can be formed which are electrically neutral. Selected impurities are thought to be capable of breaking previously formed complexes and substituting new complexes. Other impurities, while not capable of breaking previously formed complexes, are noted to prevent the further formation of these same complexes. Neutral complexes in insulating material may be electrically activated by impurities capable of breaking these complexes; thus, insulating III–V materials must be carefully qualified by screening for these delitescent conditions. Heuristic examples are given.
KeywordsNeutral Complex GaAs Crystal Background Impurity Ionicity Factor Electro Negativity
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