CdTe micro-crystal has been successfully synthesized by composite-hydroxide-mediated method (CHM) using Te and Cd(NO₃)₂ as the reactants and hydrazine hydrate as reductant. The rod- and cube-shaped CdTe have been obtained under the different reacting conditions. The length of the rods was up to about several decades of micrometers. It will be helpful to the forming of rod-shaped CdTe with appropriate deionized water added into the reacting system at temperature of 180 ℃. Here a new model was proposed to describe the growth for CdTe crystal. XRD pattern indicates that rods were well crystallized. UV-visible absorption spectrum of the rods exhibits a peak in infrared region, and the band gap of the CdTe micro-crystal is about 1.49 eV.

Key words: CdTe, composite-hydroxide-mediated method (CHM), absorption spectrum, band gap