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Double-layer CVD graphene as stretchable transparent electrodes.

Sejeong Won1, Yun Hwangbo, Seoung-Ki Lee

  • 1Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 305-701, Korea. sblee@kaist.ac.kr.

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Summary
This summary is machine-generated.

Chemically Vapor Deposited (CVD) graphene

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Electronics

Background:

  • Large-area Chemical Vapor Deposited (CVD) graphene exhibits limited stretchability due to defects from synthesis and transfer processes.
  • This poor stretchability hinders the commercialization of CVD graphene for flexible and stretchable electronics.

Purpose of the Study:

  • To investigate artificially layered CVD graphene as a potential solution for stretchable transparent electrodes.
  • To understand the electromechanical properties and failure mechanisms of multi-layer CVD graphene under tensile strain.

Main Methods:

  • Fabrication of artificially layered CVD graphene (single-layer graphene (SLG), double-layer graphene (DLG), and triple-layer graphene (TLG)).
  • Macroscopic and microscopic electromechanical tensile testing.
  • Lateral force microscopy to analyze crack generation and evolution during deformation.

Main Results:

  • Multi-layer graphene demonstrates enhanced electromechanical stretchability compared to SLG due to inter-layer sliding facilitating strain relaxation.
  • DLG exhibits significantly improved stretchability over SLG, comparable to TLG.
  • Crack initiation and propagation behavior were systematically studied concerning the number of graphene layers.

Conclusions:

  • Artificially layered CVD graphene, particularly DLG, offers a promising route to overcome the stretchability limitations of SLG.
  • DLG presents a viable candidate for stretchable transparent electrodes, balancing performance, transmittance, and transfer costs.