Exciton DynamicProcesses in Colloidal CdS/CdSe/CdSQuantum Well Nanostructures

Abstract

Colloidal quantum well nanostructures (QWs) are potential materials for optoelectronic devices, such as light-emitting diodes and lasers. CdS/CdSe/CdS and CdS/CdSe/ZnS QWs were produced within a colloidal method, on which characterizations were conducted. The transient absorption spectra showed different dynamic processes between the traditional core/shell quantum dots and QWs, as well as between CdS/CdSe/CdS and CdS/CdSe/ZnS QWs. Models were built on the basis of Marcus theory and quantum confinement effect to explain the result of the experiment.