Composition-controlled optical properties of colloidal CdSe quantum dots

- The surface of CdSe QDs are modified with cadmium followed by selenium.
- The optical properties of CdSe QDs can be controlled by manipulating the composition.
- Surface compositional change affects the surface defects or traps and recombination.
- The surface trapping state can be controlled by tuning the surface composition.
- A change in composition shows a change in the carrier life time.