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Abstract

Abstract Abstract Abstract Abstract. . . .Cd vacancies in cadmium zinc telluride(CdZnTe) crystals have an important effect on the crystal properties.In this paper, position distribution and concentration change of Cd vacancy in CdZnTe crystal grown by the temperature gradient solution growth (TGSG) were investigated by positron annihilation technology(PAT) , which was based on the potential energy distribution and probability density of the positron in the crystal. The results showed that, the density of Cd vacancy increased obviously from the first-to-freeze to stable growth of the ingots, while decreased along the radial direction of the ingots