Abstract
In the present review, various crystal growth methods are reviewed from the viewpoint of crystal growth of high-quality large CdTe and CdZnTe crystals. The VGF (Vertical Gradient Freezing) method is now becoming the most appropriate one for growing large single crystals. 100mm diameter CdZnTe twin-free single crystals have been first realized by a precisely temperature controlled VGF method. The crystal quality of these single crystals have been evaluated by Nakagawa etchant and by a four-crystal monochrometer X-ray diffraction method and the quality was found to be of high-quality as substrates for MCT epitaxial growth. The relationship between the Cd reservoir temperature and the precipitate size is discussed from the viewpoint of nonstoichiometry. The future perspectives of CdTe crystals are discussed.
