On the occurrence of polytypism in single crystal CdTe thin films

✍ Scribed by Brajesh Kumar Tiwari; O. N. Srivastava

• Publisher: John Wiley and Sons
• Year: 1980
• Tongue: English
• Weight: 403 KB
• Volume: 15
• Category: Article
• ISSN: 0232-1300
• DOI: 10.1002/crat.19800151108

✦ Synopsis

Abstract

Cadmium telluride thin films have been found to exhibit polytypism. The polytypes are formed when the as grown amorphous CdTe thin films undergo amorphous to crystalline transformation. The transformed single crystal regions correspond to different polytypes. Besides the well known zinc blende type 3 C cubic phase and less often found wurtzite type 2 H phase, four new polytypes (5 H, 6 H, 6 R and 15 R) the only ones known to‐date have been found in the present investigation. In addition to the new polytypes, a new structural variant has also been found. This has the same ‘c’ parameter as that of the 2 H phase but has its ‘a’ lattice parameter as ‘a~0~ \documentclass{article}\pagestyle{empty}\begin{document}$ a_{\rm o} \sqrt {3} $\end{document}’ (a~0~ being the common lattice parameter of the polytypes). A feasible mechanism making the formation of polytypes intelligible has been suggested.