Gigahertz Frame Rate Imaging of Charge-Injection Dynamics in a Molecular Light Source.

ABSTRACT: Light sources on the scale of single molecules can be addressed and characterized at their proper sub-nanometer scale by scanning tunneling microscopy-induced luminescence (STML). Such a source can be driven by defined short charge pulses while the luminescence is detected with sub-nanosecond resolution. We introduce an approach to concurrently image the molecular emitter, which is based on an individual defect, with its local environment along with its luminescence dynamics at a resolution of a billion frames per second. The observed dynamics can be assigned to the single electron capture occurring in the low-nanosecond regime. While the emitter's location on the surface remains fixed, the scanning of the tip modifies the energy landscape for charge injection into the defect. The principl

SUBMITTER: Roslawska A 

PROVIDER: S-EPMC8193635 | biostudies-literature | 2021 Jun

REPOSITORIES: biostudies-literature