Abstract
The electroluminescence of a polythiophene wire suspended between a metallic surface and the tip of a scanning tunneling microscope is reported. Under positive sample voltage, the spectral and voltage dependencies of the emitted light are consistent with the fluorescence of the wire junction mediated by localized plasmons. This emission is strongly attenuated for the opposite polarity. Both emission mechanism and polarity dependence are similar to what occurs in organic light emitting diodes (OLED) but at the level of a single molecular wire.
- Received 27 September 2013
DOI:https://doi.org/10.1103/PhysRevLett.112.047403
© 2014 American Physical Society
Synopsis
A Single-Molecule Light-Emitting Diode
Published 28 January 2014
Light emitted as electrical current flows through an organic polymer molecule stretched between a metal tip and surface.
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