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Tunable rectification in a molecular heterojunction with two-dimensional semiconductors

Author

Listed:
  • Jaeho Shin

    (Korea University)

  • Seunghoon Yang

    (Korea University)

  • Yeonsik Jang

    (Seoul National University)

  • Jung Sun Eo

    (Korea University)

  • Tae-Wook Kim

    (Jeonbuk National University)

  • Takhee Lee

    (Seoul National University)

  • Chul-Ho Lee

    (Korea University)

  • Gunuk Wang

    (Korea University)

Abstract

Until now, a specifically designed functional molecular species has been recognized as an absolute necessity for realizing the diode’s behavior in molecular electronic junctions. Here, we suggest a facile approach for the implementation of a tailored diode in a molecular junction based on non-functionalized alkyl and conjugated molecular monolayers. A two-dimensional semiconductor (MoS2 and WSe2) is used as a rectifying designer at the alkyl or conjugated molecule/Au interface. From the adjustment of band alignment at molecules/two-dimensional semiconductor interface that can activate different transport pathways depending on the voltage polarity, the rectifying characteristics can be implemented and controlled. The rectification ratio could be widely tuned from 1.24 to 1.83 × 104 by changing the molecular species and type and the number of layers of the two-dimensional semiconductors in the heterostructure molecular junction. Our work sets a design rule for implementing tailored-diode function in a molecular heterojunction structure with non-functionalized molecular systems.

Suggested Citation

  • Jaeho Shin & Seunghoon Yang & Yeonsik Jang & Jung Sun Eo & Tae-Wook Kim & Takhee Lee & Chul-Ho Lee & Gunuk Wang, 2020. "Tunable rectification in a molecular heterojunction with two-dimensional semiconductors," Nature Communications, Nature, vol. 11(1), pages 1-7, December.
    • Handle: RePEc:nat:natcom:v:11:y:2020:i:1:d:10.1038_s41467-020-15144-9
    DOI: 10.1038/s41467-020-15144-9
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