Kinetics of interdiffusion in semiconductor ternary quantum dots

We develop a one-dimensional transient model of species transport in ternary quantum dots (QDs) and implement the model for analysis of group-VI species interdiffusion kinetics in ZnSe1−xSx nanocrystals. We use the model results for the interpretation of x-ray photoelectron spectroscopy data for the group-VI species near-surface concentration evolution during thermal annealing of ZnSe1−xSx QDs with a ZnSe/ZnS core/shell initial configuration. The model provides an excellent fitting of the experimental data, which is used to derive transport coefficients and thermal activation barriers for diffusion in the ternary QDs.