Copper solubility and distribution in doped GaSb single crystals |
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| Authors: | J. Šesták B. Štěpánek H. Yokokawa V. Šestáková |
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| Affiliation: | (1) Institute of Physics, Semiconductor Department, Academy of Sciences of the Czech Republic, Cukrovarnická 10, 162 00 Prague 6, Czech Republic;(2) Department of Inorganic Materials, National Institute of Materials and Chemical Research, 305 Tsukuba, Ibaraki, Japan |
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| Abstract: | For the GaSb single crystals doped with copper (grown using the Czochralski method without encapsulant in flowing atmosphere of hydrogen) the distribution coefficient of copper in GaSb,k eff=0.0021±0.0006 was found and the copper solubility in GaSb was discussed. The region of copper solubility in GaSb was analyzed on the thermodynamic basis using chemical phase diagram in the Sb?Ga?Cu system. Due to a rather low solubility of copper, its excessive amount in GaSb caused probably an increase of the dislocation density at the end of the GaSb single crystals. |
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| Keywords: | GaSb single crystals phase diagram Sb− Ga− Cu system |
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