The effects of growth temperature on the properties of Cd_1-xZn_xTe prepared by close-spaced sublimation

The Cd_1-xZn_xTe polycrystalline thin films were deposited by close-spaced sublimation (CSS) with the powders sources Cd_1-xZn_xTe. The influence of growth temperature on the growth rate, structure and properties of thin films were studied by analysising the film with SEM, XRD, UV spectrophotometer and so on. The results showed that the growth rate increased with the temperature increases and increasing rate speed up above the 528°C. The Cd_1-xZn_xTe thin films prepared at of the different temperature possess cubic structure, and tend to grow along the orientation of (111) face. The crystal size increases with the increases of temperature which reaches the 1 and 20 μm at the 438 and 568°C respectively. The optical energy gap of all the films are in the region of 1.49-1. 51 eV.