Samples of p-type Hg0.8Cd0.2Te, which contained dislocation densities of up to 3 x 105/cm2, low-angle grain boundaries and a few high-angle grain boundaries, were prepared. Diffusion in the samples was then measured by using 203Hg radio-tracer and serial-sectioning techniques at 640K. The calculated erfc curve for diffusion in the perfect crystal corresponded to a diffusivity of 9 x 10-12cm2/s. Samples with high-angle grain boundaries exhibited a tail, at greater depths, which deviated markedly from the erfc curve. It was pointed out that this behavior had to be considered in all diffusion-controlled processes.

A.Klimakow, M.Schenk: Physica Status Solidi A, 1989, 115[2], K135-8