Exploiting plasmon-induced hot electrons in molecular electronic devices.

Published

Journal Article

Plasmonic nanostructures can induce a number of interesting responses in devices. Here we show that hot electrons can be extracted from plasmonic particles and directed into a molecular electronic device, which represents a new mechanism of transfer from light to electronic transport. To isolate this phenomenon from alternative and sometimes simultaneous mechanisms of plasmon-exciton interactions, we designed a family of hybrid nanostructure devices consisting of Au nanoparticles and optoelectronically functional porphyin molecules that enable precise control of electronic and optical properties. Temperature- and wavelength-dependent transport measurements are analyzed in the context of optical absorption spectra of the molecules, the Au particle arrays, and the devices. Enhanced photocurrent associated with exciton generation in the molecule is distinguished from enhancements due to plasmon interactions. Mechanisms of plasmon-induced current are examined, and it is found that hot electron generation can be distinguished from other possibilities.

Full Text

Duke Authors

Cited Authors

  • Conklin, D; Nanayakkara, S; Park, T-H; Lagadec, MF; Stecher, JT; Chen, X; Therien, MJ; Bonnell, DA

Published Date

  • May 2013

Published In

Volume / Issue

  • 7 / 5

Start / End Page

  • 4479 - 4486

PubMed ID

  • 23550717

Pubmed Central ID

  • 23550717

Electronic International Standard Serial Number (EISSN)

  • 1936-086X

International Standard Serial Number (ISSN)

  • 1936-0851

Digital Object Identifier (DOI)

  • 10.1021/nn401071d

Language

  • eng