COPPER SOLUBILITY AND DISTRIBUTION IN DOPED GASB SINGLE-CRYSTALS

For the GaSb single crystals doped with copper (grown using the Czochr alski method without encapsulant in flowing atmosphere of hydrogen) th e 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 l ow solubility of copper, its excessive amount in GaSb caused probably an increase of the dislocation density at the end of the GaSb single c rystals.