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Korean Carbon Society (한국탄소학회)
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Performance-determining factors in flexible transparent conducting single-wall carbon nanotube film

  • Song, Young Il (School of Advanced Materials Science and Engineering, Sungkyunkwan University) ;
  • Lee, Jung Woo (School of Advanced Materials Science and Engineering, Sungkyunkwan University) ;
  • Kim, Tae Yoo (School of Advanced Materials Science and Engineering, Sungkyunkwan University) ;
  • Jung, Hwan Jung (Institute of Advanced Composites Materials, Korea Institute of Science and Technology) ;
  • Jung, Yong Chae (Institute of Advanced Composites Materials, Korea Institute of Science and Technology) ;
  • Suh, Su Jeung (School of Advanced Materials Science and Engineering, Sungkyunkwan University) ;
  • Yang, Cheol-Min (Institute of Advanced Composites Materials, Korea Institute of Science and Technology)
  • Received : 2013.08.25
  • Accepted : 2013.10.05
  • Published : 2013.10.31
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Abstract

Flexible transparent conducting films (TCFs) were fabricated by dip-coating single-wall carbon nanotubes (SWCNTs) onto a flexible polyethylene terephthalate (PET) film. The amount of coated SWCNTs was controlled simply by dipping number. Because the performance of SWCNT-based TCFs is influenced by both electrical conductance and optical transmittance, we evaluated the film performance by introducing a film property factor using both the number of interconnected SWCNT bundles at intersection points, and the coverage of SWCNTs on the PET substrate, in field emission scanning electron microscopic images. The microscopic film property factor was in an excellent agreement with the macroscopic one determined from electrical conductance and optical transmittance measurements, especially for a small number of dippings. Therefore, the most crucial factor governing the performance of the SWCNT-based TCFs is a SWCNT-network structure with a large number of intersection points for a minimum amount of deposited SWCNTs.

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References

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