Interdisziplinäres Zentrum für Materialwissenschaften
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Interdisziplinäres Zentrum für Materialwissenschaften
Nanotechnikum Weinberg
Heinrich-Damerow-Str. 4,
D-06120 Halle, Germany
Phone: +49 345 55 28471
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H. S. Leipner, R. Scholz, F. Syrowatka, H. Uniewski, J. Schreiber
Study of copper aggregations at dislocations in GaAs
Mater. Sci. Eng. B 42 (1996), 186-189

In copper diffused gallium arsenide cathodoluminescence investigations were combined with analytical and transmission electron microscopy in order to interpret the occurrence of bright or dark dislocation contrasts. Various structures of Cu agglomerations were found in dependence on diffusion temperature and cooling rate. Bright dislocation contrasts are related to the enrichment of solute CuGa acceptors, wheras dark contrasts are mainly due to non-radiative recombination of Cu-As precipitates or clouds of small dislocation loops.

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