Epitaxial growth of CdTe thin film on cube-textured Ni by metal-organic chemical vapor deposition

摘要

Single crystal-like CdTe thin film has been grown by metalorganic chemical vapor deposition on cube-textured Ni(100) substrate. Using X-ray pole figurejneasurements we observed the epitaxial relationship of {111}_(CdTe)//{001}_(Ni) with [110]_(CdTe)//[010]_(Ni) and [112]_(CdTe)//[100]_(Ni).The 12 diffraction peaks in the (111) pole figure of CdTe film and their relative positions with respect to the four peak positions in the (111) pole figure of Ni substrate are consistent withfour equivalent orientational domains of CdTe with three to four superlat-tice match of about 1.6% in the [110] direction of CdTe and the [010] direction of Ni. The electron backscat-tered diffraction images show that the CdTe domains are 30° oriented from each other. These high structural quality films may find applications in low cost optoelectronic devices.