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Structural order enhances charge carrier transport in self-assembled Au-nanoclusters

Author

Listed:
  • Florian Fetzer

    (Institut für Anorganische Chemie Universität Tübingen)

  • Andre Maier

    (Universität Tübingen
    Universität Tübingen)

  • Martin Hodas

    (Universität Tübingen)

  • Olympia Geladari

    (Universität Tübingen
    Universität Tübingen)

  • Kai Braun

    (Universität Tübingen
    Universität Tübingen)

  • Alfred J. Meixner

    (Universität Tübingen
    Universität Tübingen)

  • Frank Schreiber

    (Universität Tübingen
    Universität Tübingen)

  • Andreas Schnepf

    (Institut für Anorganische Chemie Universität Tübingen)

  • Marcus Scheele

    (Universität Tübingen
    Universität Tübingen)

Abstract

The collective properties of self-assembled nanoparticles with long-range order bear immense potential for customized electronic materials by design. However, to mitigate the shortcoming of the finite-size distribution of nanoparticles and thus, the inherent energetic disorder within assemblies, atomically precise nanoclusters are the most promising building blocks. We report an easy and broadly applicable method for the controlled self-assembly of atomically precise Au32(nBu3P)12Cl8 nanoclusters into micro-crystals. This enables the determination of emergent optoelectronic properties which resulted from long-range order in such assemblies. Compared to the same nanoclusters in glassy, polycrystalline ensembles, we find a 100-fold increase in the electric conductivity and charge carrier mobility as well as additional optical transitions. We show that these effects are due to a vanishing energetic disorder and a drastically reduced activation energy to charge transport in the highly ordered assemblies. This first correlation of structure and electronic properties by comparing glassy and crystalline self-assembled superstructures of atomically precise gold nanoclusters paves the way towards functional materials with novel collective optoelectronic properties.

Suggested Citation

  • Florian Fetzer & Andre Maier & Martin Hodas & Olympia Geladari & Kai Braun & Alfred J. Meixner & Frank Schreiber & Andreas Schnepf & Marcus Scheele, 2020. "Structural order enhances charge carrier transport in self-assembled Au-nanoclusters," Nature Communications, Nature, vol. 11(1), pages 1-8, December.
  • Handle: RePEc:nat:natcom:v:11:y:2020:i:1:d:10.1038_s41467-020-19461-x
    DOI: 10.1038/s41467-020-19461-x
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    Cited by:

    1. Dmitry Lapkin & Christopher Kirsch & Jonas Hiller & Denis Andrienko & Dameli Assalauova & Kai Braun & Jerome Carnis & Young Yong Kim & Mukunda Mandal & Andre Maier & Alfred J. Meixner & Nastasia Mukha, 2022. "Spatially resolved fluorescence of caesium lead halide perovskite supercrystals reveals quasi-atomic behavior of nanocrystals," Nature Communications, Nature, vol. 13(1), pages 1-10, December.

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