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Hole-phonon coupling effect on the band dispersion of organic molecular semiconductors

Author

Listed:
  • F. Bussolotti

    (Institute for Molecular Science
    Institute of Materials Research and Engineering (IMRE))

  • J. Yang

    (Graduate School of Advanced Integration Science, Chiba University
    College of Physical Science and Technology, Yangzhou University)

  • T. Yamaguchi

    (Institute for Molecular Science
    SOKENDAI (The Graduate University for Advanced Studies))

  • K. Yonezawa

    (Institute for Molecular Science)

  • K. Sato

    (Graduate School of Advanced Integration Science, Chiba University)

  • M. Matsunami

    (Institute for Molecular Science
    Toyota Technological Institute)

  • K. Tanaka

    (Institute for Molecular Science
    SOKENDAI (The Graduate University for Advanced Studies))

  • Y. Nakayama

    (Graduate School of Advanced Integration Science, Chiba University
    Department of Pure and Applied Chemistry, Faculty of Science and Technology, Tokyo University of Science)

  • H. Ishii

    (Graduate School of Advanced Integration Science, Chiba University)

  • N. Ueno

    (Graduate School of Advanced Integration Science, Chiba University)

  • S. Kera

    (Institute for Molecular Science
    Graduate School of Advanced Integration Science, Chiba University
    SOKENDAI (The Graduate University for Advanced Studies))

Abstract

The dynamic interaction between the traveling charges and the molecular vibrations is critical for the charge transport in organic semiconductors. However, a direct evidence of the expected impact of the charge-phonon coupling on the band dispersion of organic semiconductors is yet to be provided. Here, we report on the electronic properties of rubrene single crystal as investigated by angle resolved ultraviolet photoelectron spectroscopy. A gap opening and kink-like features in the rubrene electronic band dispersion are observed. In particular, the latter results in a large enhancement of the hole effective mass (> 1.4), well above the limit of the theoretical estimations. The results are consistent with the expected modifications of the band structures in organic semiconductors as introduced by hole-phonon coupling effects and represent an important experimental step toward the understanding of the charge localization phenomena in organic materials.

Suggested Citation

  • F. Bussolotti & J. Yang & T. Yamaguchi & K. Yonezawa & K. Sato & M. Matsunami & K. Tanaka & Y. Nakayama & H. Ishii & N. Ueno & S. Kera, 2017. "Hole-phonon coupling effect on the band dispersion of organic molecular semiconductors," Nature Communications, Nature, vol. 8(1), pages 1-7, December.
    • Handle: RePEc:nat:natcom:v:8:y:2017:i:1:d:10.1038_s41467-017-00241-z
    DOI: 10.1038/s41467-017-00241-z
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    Cited by:

    1. Andrin Doll & Zhewen Xu & Vladyslav Romankov & Giovanni Boero & Stefano Rusponi & Harald Brune & Zaher Salman & Jan Dreiser, 2024. "Element-specific X-Ray detection of electron paramagnetic resonance in thin films of quantum bits," Nature Communications, Nature, vol. 15(1), pages 1-9, December.

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