Crystals of the compound semiconductor Cd0.55Mn0.45Te were grown by modified Bridgeman technique. The resulting crystals were transparent, with a deep red color. There were no precipitates visible up to the 1.5μm resolution of the optical transmission microscopy system used. The electrical resistivity was measured to be 1x105Ωcm. The ability to grow large precipitate free crystals makes this system a good candidate for radiation detector elements. Electrical properties must be improved through better control of the concentration of electronically active impurities.
Large-size CZT single crystals of up to 300 cm3 have been grown at Yinnel Tech. These crystals were produced into radiation detectors with excellent performances, leading to enhancements in both energy resolution and detector efficiency.
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