In order to obtain more information on the doping behavior of II-VI semiconductors, positron annihilation spectroscopy experiments were carried out on Li-doped crystals. The incorporation of Li was investigated as a function of the crystal temperature and Li vapor pressure. The increase in the InM-VM fraction was determined by the temperature of the sample. The behavior was explained by assuming that the incorporation of Li was determined by the solubility of Li. It was noted that the fraction of In probe atoms which formed an InM-VM pair did not exceed 50%. This was attributed to a relatively low solubility of Li, and to a generally weak compensation of the donor by intrinsic defects.

H.Wolf, U.Hornauer, R.Lermen, Y.Endalamaw, T.Filz, T.Krings, S.Lauer, U.Ott, E.Singer, M.Tsige, T.Wichert: Materials Science Forum, 1994, 143-147, 391-6