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Giant enhancement in vertical conductivity of stacked CVD graphene sheets by self-assembled molecular layers

Author

Listed:
  • Yanpeng Liu

    (Graphene Research Center, National University of Singapore
    NanoCore, National University of Singapore)

  • Li Yuan

    (Graphene Research Center, National University of Singapore)

  • Ming Yang

    (National University of Singapore)

  • Yi Zheng

    (Graphene Research Center, National University of Singapore)

  • Linjun Li

    (Graphene Research Center, National University of Singapore)

  • Libo Gao

    (Graphene Research Center, National University of Singapore)

  • Nisachol Nerngchamnong

    (Graphene Research Center, National University of Singapore)

  • Chang Tai Nai

    (Graphene Research Center, National University of Singapore
    NUS Graduate School for Integrative Sciences and Engineering)

  • C. S. Suchand Sangeeth

    (Graphene Research Center, National University of Singapore)

  • Yuan Ping Feng

    (National University of Singapore)

  • Christian A. Nijhuis

    (Graphene Research Center, National University of Singapore)

  • Kian Ping Loh

    (Graphene Research Center, National University of Singapore)

Abstract

Layer-by-layer-stacked chemical vapour deposition (CVD) graphene films find applications as transparent and conductive electrodes in solar cells, organic light-emitting diodes and touch panels. Common to lamellar-type systems with anisotropic electron delocalization, the plane-to-plane (vertical) conductivity in such systems is several orders lower than its in-plane conductivity. The poor electronic coupling between the planes is due to the presence of transfer process organic residues and trapped air pocket in wrinkles. Here we show the plane-to-plane tunnelling conductivity of stacked CVD graphene layers can be improved significantly by inserting 1-pyrenebutyric acid N-hydroxysuccinimide ester between the graphene layers. The six orders of magnitude increase in plane-to-plane conductivity is due to hole doping, orbital hybridization, planarization and the exclusion of polymer residues. Our results highlight the importance of interfacial modification for enhancing the performance of LBL-stacked CVD graphene films, which should be applicable to other types of stacked two-dimensional films.

Suggested Citation

  • Yanpeng Liu & Li Yuan & Ming Yang & Yi Zheng & Linjun Li & Libo Gao & Nisachol Nerngchamnong & Chang Tai Nai & C. S. Suchand Sangeeth & Yuan Ping Feng & Christian A. Nijhuis & Kian Ping Loh, 2014. "Giant enhancement in vertical conductivity of stacked CVD graphene sheets by self-assembled molecular layers," Nature Communications, Nature, vol. 5(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:5:y:2014:i:1:d:10.1038_ncomms6461
    DOI: 10.1038/ncomms6461
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    Cited by:

    1. Hu Li & Huarui Gong & Tsz Hung Wong & Jingkun Zhou & Yuqiong Wang & Long Lin & Ying Dou & Huiling Jia & Xingcan Huang & Zhan Gao & Rui Shi & Ya Huang & Zhenlin Chen & Wooyoung PARK & Ji Yu Li & Hongwe, 2023. "Wireless, battery-free, multifunctional integrated bioelectronics for respiratory pathogens monitoring and severity evaluation," Nature Communications, Nature, vol. 14(1), pages 1-13, December.

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