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Hot luminescence from single-molecule chromophores electrically and mechanically self-decoupled by tripodal scaffolds

Author

Listed:
  • Vibhuti Rai

    (Karlsruhe Institute of Technology (KIT))

  • Nico Balzer

    (Karlsruhe Institute of Technology (KIT))

  • Gabriel Derenbach

    (Karlsruhe Institute of Technology (KIT))

  • Christof Holzer

    (Karlsruhe Institute of Technology (KIT))

  • Marcel Mayor

    (Karlsruhe Institute of Technology (KIT)
    Karlsruhe Institute of Technology (KIT)
    University of Basel
    Sun Yat-Sen University (SYSU))

  • Wulf Wulfhekel

    (Karlsruhe Institute of Technology (KIT)
    Karlsruhe Institute of Technology (KIT))

  • Lukas Gerhard

    (Karlsruhe Institute of Technology (KIT))

  • Michal Valášek

    (Karlsruhe Institute of Technology (KIT))

Abstract

Control over the electrical contact to an individual molecule is one of the biggest challenges in molecular optoelectronics. The mounting of individual chromophores on extended tripodal scaffolds enables both efficient electrical and mechanical decoupling of individual chromophores from metallic leads. Core-substituted naphthalene diimides fixed perpendicular to a gold substrate by a covalently attached extended tripod display high stability with well-defined and efficient electroluminescence down to the single-molecule level. The molecularly controlled spatial arrangement balances the electric conduction for electroluminescence and the insulation to avoid non-radiative carrier recombination, enabling the spectrally and spatially resolved electroluminescence of individual self-decoupled chromophores in a scanning tunneling microscope. Hot luminescence bands are even visible in single self-decoupled chromophores, documenting the mechanical decoupling between the vibrons of the chromophore and the substrate.

Suggested Citation

  • Vibhuti Rai & Nico Balzer & Gabriel Derenbach & Christof Holzer & Marcel Mayor & Wulf Wulfhekel & Lukas Gerhard & Michal Valášek, 2023. "Hot luminescence from single-molecule chromophores electrically and mechanically self-decoupled by tripodal scaffolds," Nature Communications, Nature, vol. 14(1), pages 1-10, December.
    • Handle: RePEc:nat:natcom:v:14:y:2023:i:1:d:10.1038_s41467-023-43948-y
    DOI: 10.1038/s41467-023-43948-y
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    References listed on IDEAS

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