The diffusion of 64Cu from Cu2Te, and into undoped zone-purified monocrystalline material, was studied by means of etching and activity measurements of the remaining specimen. Data were obtained for Cu concentrations of some 3 x 1016 to 2 x 1018/cm3. The tail sections of the diffusion profiles indicated a much faster diffusion rate at Cu concentrations of about 1015/cm3. Diffusivities of less than 4 x 10-12cm2/s at 150C, and 3.5 x 10-11cm2/s at 200C, corresponded to:

97-300C:     D (cm2/s) = 3.7 x 10-4 exp[-0.67(eV)/kT]

Diffusion and Solubility Measurements of Cu in CdTe. H.H.Woodbury, M.Aven: Journal of Applied Physics, 1968, 39[12], 5485-8