Abstract
The limiting solubilities of copper and antimony in germanium at 773 and 873 K were determined by measuring microchardness of solid solution crystals. The solubility of copper was found to increase substantially in the presence of antimony. This observation was explained based on concept of donor - acceptor interactions resulting in the formation of the (CuSb) charges complex. An analytic expression for the solubility of donors (antimony) as a function of the content of acceptors (copper) and vice versa was obtained. These relations were used to calculate the cosolubility of doping elements in the Ge–Cu–Sb system. The calculated and experimental solubility values were in close agreement with each other.
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