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Ultralow contact resistance in organic transistors via orbital hybridization

Author

Listed:
  • Junpeng Zeng

    (Nanjing University)

  • Daowei He

    (Nanjing University)

  • Jingsi Qiao

    (Beijing Institute of Technology
    Renmin University of China)

  • Yating Li

    (Nanjing University)

  • Li Sun

    (Nanjing University)

  • Weisheng Li

    (Nanjing University)

  • Jiacheng Xie

    (Nanjing University)

  • Si Gao

    (Nanjing University)

  • Lijia Pan

    (Nanjing University)

  • Peng Wang

    (Nanjing University)

  • Yong Xu

    (Nanjing University of Posts and Telecommunications)

  • Yun Li

    (Nanjing University)

  • Hao Qiu

    (Nanjing University)

  • Yi Shi

    (Nanjing University)

  • Jian-Bin Xu

    (The Chinese University of Hong Kong)

  • Wei Ji

    (Renmin University of China)

  • Xinran Wang

    (Nanjing University
    Nanjing University)

Abstract

Organic field-effect transistors (OFETs) are of interest in unconventional form of electronics. However, high-performance OFETs are currently contact-limited, which represent a major challenge toward operation in the gigahertz regime. Here, we realize ultralow total contact resistance (Rc) down to 14.0 Ω ∙ cm in C10-DNTT OFETs by using transferred platinum (Pt) as contact. We observe evidence of Pt-catalyzed dehydrogenation of side alkyl chains which effectively reduces the metal-semiconductor van der Waals gap and promotes orbital hybridization. We report the ultrahigh performance OFETs, including hole mobility of 18 cm2 V−1 s−1, saturation current of 28.8 μA/μm, subthreshold swing of 60 mV/dec, and intrinsic cutoff frequency of 0.36 GHz. We further develop resist-free transfer and patterning strategies to fabricate large-area OFET arrays, showing 100% yield and excellent variability in the transistor metrics. As alkyl chains widely exist in conjugated molecules and polymers, our strategy can potentially enhance the performance of a broad range of organic optoelectronic devices.

Suggested Citation

  • Junpeng Zeng & Daowei He & Jingsi Qiao & Yating Li & Li Sun & Weisheng Li & Jiacheng Xie & Si Gao & Lijia Pan & Peng Wang & Yong Xu & Yun Li & Hao Qiu & Yi Shi & Jian-Bin Xu & Wei Ji & Xinran Wang, 2023. "Ultralow contact resistance in organic transistors via orbital hybridization," Nature Communications, Nature, vol. 14(1), pages 1-10, December.
  • Handle: RePEc:nat:natcom:v:14:y:2023:i:1:d:10.1038_s41467-023-36006-0
    DOI: 10.1038/s41467-023-36006-0
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    References listed on IDEAS

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    Cited by:

    1. Chungryeol Lee & Changhyeon Lee & Seungmin Lee & Junhwan Choi & Hocheon Yoo & Sung Gap Im, 2023. "A reconfigurable binary/ternary logic conversion-in-memory based on drain-aligned floating-gate heterojunction transistors," Nature Communications, Nature, vol. 14(1), pages 1-11, December.

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