Investigation of Purifying Cd_(0.9)Zn_(0.1)Te Using Traditional Physical Vapor Transport Method

摘要

The synthesized Cd_(0.9)Zn_(0.1)Te (CZT) material were purified twice using physical vapor transport method based on the principle of different vapor pressures between bulk material and impurities. Compared the total vapor pressure of Cd_(0.9)Zn_(0.1)Te with those of Al, Ag, Cu, Fe, Au and Ni under different temperature, the source end temperature was determined at 1173K. The mass flux of Cd, Zn and Te was calculated under different temperature gradients. 72 hours of transport time correspond with temperature gradient of 13K/cm. The purification results showed that the content of impurities, Ag, Cu, Al, Fe, Na, Au and Ni decreased remarkably.