The influence of growth conditions on the quality of CdZnTe single crystals

Franc, J., Grill, R., Hli­dek, P. , Belas, E., Turjanska, L., Hoschl, P., Turkevych, I., Toth, A. L., Moravec, P. and Sitter, H. (2001) The influence of growth conditions on the quality of CdZnTe single crystals. Semiconductor Science and Technology, 16 (6). pp. 514-520. ISSN 0268-1242

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Experimental conditions were investigated for growth of inclusion-free near-stoichiometric CdZnTe single crystals with a minimized concentration of native point defects. The positions of the stoichiometric line pS = 8 � 105 exp(-1.76 � 104/T) (atm) and the room-temperature and high-temperature p-n lines were evaluated from high-temperature in situ galvanomagnetic measurements. The Cd pressure at the congruent melting point was estimated at � 1.15-1.20 atm from analysis of the total inclusion volume of five single crystals fabricated at Cd pressures in the range of 1-1.3 atm. An inclusion-free single crystal was prepared at PCd � 1.2 atm. Calculations based on a model of two major defects, the Cd vacancy and the Cd interstitial, show that a very small deviation of PCd from PS results in a large generation of the native defects. Thus a reproducible production of a high-resistivity material by a slow cooling along the PS seems to be very difficult.

Keywords:Cadmium compounds, Defects, Electric conductivity, Galvanomagnetic effects, Stoichiometry, Congruent melting points, Single crystals
Subjects:F Physical Sciences > F300 Physics
Divisions:College of Science > School of Chemistry
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ID Code:22502
Deposited On:07 Apr 2016 17:47

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