Gate Tuning of Forster Resonance Energy Transfer in a Graphene - Quantum Dot FET Photo-Detector.

ABSTRACT: Graphene photo-detectors functionalized by colloidal quantum dots (cQDs) have been demonstrated to show effective photo-detection. Although the transfer of charge carriers or energy from the cQDs to graphene is not sufficiently understood, it is clear that the mechanism and efficiency of the transfer depends on the morphology of the interface between cQDs and graphene, which is determined by the shell of the cQDs in combination with its ligands. Here, we present a study of a graphene field-effect transistor (FET), which is functionalized by long-ligand CdSe/ZnS core/shell cQDs. Time-resolved photo-luminescence from the cQDs as a function of the applied gate voltage has been investigated in order to probe transfer dynamics in this system. Thereby, a clear modification of the photo-luminesce

SUBMITTER: Li R 

PROVIDER: S-EPMC4913307 | biostudies-literature | 2016 Jun

REPOSITORIES: biostudies-literature