Abstract
Scanning tunneling microscope-induced light emission from multilayers of colloidal quantum dots (QDs) is found to exceed by up to 2 orders of magnitude the well-known radiation from a local tip-induced plasmon (TIP) at a QD-free gold surface. Emission spectra and the bias-voltage dependence of current and light emission point to inelastic electron-tunneling (IET) excitation of a coupled QD-TIP mode, enhanced by the dielectric properties of the QD multilayer. The threshold voltage for STM-LE is found to depend on the optical gap of the quantum dots, stipulating a simple energy conservation rule for light emission through IET. The results highlight fundamental issues underlying nanoparticle-based optoelectronic devices.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
