Fig. 6.
(Top row) Single-particle band gap values (Egap = E1-H1) as a function of core radius (R) and shell thickness (H). (Bottom row) Electron–hole transition dipole moments, as a measure of electron–hole spatial separation, plotted for different R/H ratios. The left column shows results for unalloyed InS/ZnS core/shell nanocrystals, while the right column corresponds to alloyed ZnIn₀.₅S/ZnS systems. Small core radii combined with thick shells typically lead to increased electron–hole separation, indicating type-II confinement. White diamonds along the dashed lines indicate the specific R/H ratios for which radial density distributions are shown in Figs. 4 and 5.