Özet:
Large volume single crystals of Cd 0.9 Zn 0.1 Te (CZT) have been grown by vertical Bridgman technique using in-house zone refined precursor materials (Cd, Zn, and Te). The grown semi-insulating CZT crystals have shown high promise for high-resolution room-temperature radiation detectors due to their high dark resistivity (~4×10 10 Ω-cm), good charge transport properties [(μτ) e = (6-8) × 10 -3 cm 2 /V], and relatively low cost. The grown CZT single crystals (~2.8 cm diameter and >10 cm long) have demonstrated a very low radial Zn concentration deviation, low dislocation densities and Te precipitate/inclusions, and high infrared transmission. Details of the CZT single crystal growth, their physical and chemical analysis, surface processing, nuclear radiation detector fabrication, and testing of these devices are presented.