Anomalous diffusion profiles of Ag in single crystalline CdTe were observed using the radiotracer 111Ag. The diffusion anneals were performed at 800K under Cd or Te vapor and in a vacuum for different Ag concentrations. The measured Ag profiles directly reflect the distribution of the self-interstitials and vacancies of the Cd sub-lattice and were the result of chemical self-diffusion which described the variation of the deviation from stoichiometry of the binary crystal as a function of depth and time.

Anomalous Diffusion Profiles of Ag in CdTe due to Chemical Self-Diffusion. H.Wolf, F.Wagner, T.Wichert: Physical Review Letters, 2005, 94[12], 125901 (3pp)