A study is reported of the dynamics of dopant incorporation in iodine
doped CdTe. Using a mathematical formulation, the iodine doping profil
es in CdTe and HgCdTe have been fitted to experiment to obtain materia
l parameters such as the bulk and surface diffusion and the segregatio
n energy. Dopant profile fitting showed that iodine diffusion was insi
gnificant and gave an iodine segregation energy of 0.6 eV and a surfac
e diffusivity enhancement factor of 300 at a growth temperature of 230
degrees C. The model was used to determine the effect of the growth r
ate and temperature for particular growth conditions.