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Few-layered organic single-crystalline heterojunctions for high-performance phototransistors

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Abstract

Photogating and electrical gating are key physical mechanisms in organic phototransistors (OPTs). However, most OPTs are based on thick and polycrystalline films, which leads to substantially low efficiency of both photogating and electrical gating and thus reduced photoresponse. Herein, high-performance OPTs based on few-layered organic single-crystalline heterojunctions are proposed and the obstacle of thick and polycrystalline films for photodetection is overcome. Because of the molecular scale thickness of the type I organic single-crystalline heterojunctions in OPTs, both photogating and electrical gating are highly efficient. By synergy of efficient photogating and electrical gating, key figures of merit of OPTs reach the highest among those based on planar heterojunctions so far as we know. The production of few-layered organic single-crystalline heterojunctions will provide a new type of advanced materials for various applications.

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Acknowledgements

The authors acknowledge the financial support from the National Natural Science Foundation of China (Nos. 51873148, 52073206, 51633006, and 61704038), the Natural Science Foundation of Tianjin City (No. 18JC-YBJC18400), and Strategic Priority Research Program of Chinese Academy of Sciences (XDB36000000).

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Authors and Affiliations

  1. Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Department of Chemistry, School of Science, Tianjin University, Tianjin, 300072, China

    Xinzi Tian, Jiarong Yao, Lijuan Zhang, Bin Han, Fangxu Yang, Xiaotao Zhang, Rongjin Li & Wenping Hu

  2. Joint School of National University of Singapore and Tianjin University, International Campus of Tianjin University, Binhai New City, Fuzhou, 350207, China

    Wenping Hu

  3. CAS Key Laboratory of Standardization and Measurement for Nanotechnology, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing, 100190, China

    Jianwei Shi & Xinfeng Liu

  4. State Key Laboratory of Materials Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology (HUST), Wuhan, 430074, China

    Jianwei Su & Tianyou Zhai

  5. National Laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China

    Jie Liu, Chunlei Li, Lang Jiang, Ye Zou & Wenping Hu

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  1. Xinzi Tian
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Correspondence to Xinfeng Liu or Rongjin Li.

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Tian, X., Yao, J., Zhang, L. et al. Few-layered organic single-crystalline heterojunctions for high-performance phototransistors. Nano Res. 15, 2667–2673 (2022). https://doi.org/10.1007/s12274-021-3730-3

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