Abstract
GaSb single crystals doped with nitrogen and indium were grown using the Czochralski method without encapsulant in a flowing atmosphere of hydrogen and were studied for etch pit density (EPD) and Hall mobility. It has been found that the dopants had no influence on the average EPD in the GaSb crystals. However, EPD profiles of undoped and In-doped GaSb showed a decrease along the growth direction (from the beginning to the end of the crystals), while the EPD profile of N-doped crystals showed a sharp increase. This behaviour of N-doped crystals can be explained by the development of stresses near the solidification interface, as a result of nitrogen volatilization during growth.
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