| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1645684 | Materials Letters | 2013 | 4 Pages |
In this study, the core-size dependent optical properties of CdSe and its surface passivation effects are investigated. In order to evaluate the size-dependence of CdSe crystals, the synthesis temperatures are varied from 240 °C to 300 °C. The PL intensity of the synthesized CdSe QDs is increased by employing the core/shell structure, i.e., CdSe/CdS. It is can be explained by considering of the defect states passivation effects on the CdSe surface. Smaller-core quantum dots (QDs), which were synthesized at 240 °C, show effective photoluminescence enhancement and a stable core/shell structure. It is expected that the smaller QDs with a short wavelength are strongly affected by the shell due to the relatively unstable surface. Also, the thicknesses of shell on cores decide the phase information such as XRD patterns.
► In this study, we synthesized CdSe core and CdSe/CdS core/shell QDs using a colloidal solvent process. ► The manuscript reports that the core-size dependent optical properties of CdSe and its surface passivation effects are investigated. ► The smaller core QDs show effective PL enhancement and a stable core/shell structure.
