Fig. 5
From: Fabrication of a light-emitting device based on the CdS/ZnS spherical quantum dots
Absorbance spectrum for CdS/ZnS core/shell when W values decreases from 10, 6 to 3. wave length at two different thicknesses of the ZnS shell. First we synthesize the core/Shell CdS/ZnS, then we decrease or increase the shell thickness to prepare core/half shell (Fig. 6(b)) or core/double shell (Fig. 7(b)). The change in absorbance peak is determined by the shell thickness and thus the dot size