Abstract
High purity CdTe single crystals have been grown by improved physical vapor transport (PVT), following the purification by normal freezing using 6N Te and highly purified Cd as starting materials. As-grown single crystals were characterized with photoluminescence and photo-excited cyclotron resonance (CR) at 4.2 K and infrared transmission at room temperature. The improved PVT growth ampoule was confirmed very effective for controlling the growth rate and the reproducibility of a successful growth. Electron cyclotron mobility at 4.2 K is as high as 2.5 × 10 5 cm 2/V · s and the neutral donor concentration ( N D) obtained from the linewidth of CR is 5 × 10 14 cm −3.
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