【摘 要】
：
Te-doped GaSb single crystal grown by the liquid encapsulated Czochralski (LEC) method exhibits a lag of compen-sating progress and a maximum carrier concentrat
【机 构】
：
Key Laboratory of Semiconductor Materials Science and Beijing Key Laboratory of Low-Dimensional Semi
论文部分内容阅读
Te-doped GaSb single crystal grown by the liquid encapsulated Czochralski (LEC) method exhibits a lag of compen-sating progress and a maximum carrier concentration around 8×1017 cm?3. The reason for this phenomenon has been investigated by a quantity concentration evaluation of the Te donor and native acceptor. The results of glow discharge mass spectrometry (GDMS) and Hall measurement suggest that the acceptor concentration increases with the increase of Te doping concentration, resulting in the enhancement of electrical compensation and free electron concentration reduction. The acceptor concentration variation is further demonstrated by photoluminescence spectra and explained by the principle of Fermi level dependent defect formation energy.
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