Design of a polymer-carbon nanohybrid junction by interface modeling for efficient printed transistors

  • Kim D
  • Shin H
  • Lee H
 et al. 
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Abstract

Molecularly hybridized materials composed of polymer semiconductors (PSCs) and single-walled carbon nanotubes (SWNTs) may provide a new way to exploit an advantageous combination of semiconductors, which yields electrical properties that are not available in a single-component system. We demonstrate for the first time high-performance inkjet-printed hybrid thin film transistors with an electrically engineered heterostructure by using specially designed PSCs and semiconducting SWNTs (sc-SWNTs) whose system achieved a high mobility of 0.23 cm(2) V(-1) s(-1), no V(on) shift, and a low off-current. PSCs were designed by calculation of the density of states of the backbone structure, which was related to charge transfer. The sc-SWNTs were prepared by a single cascade of the density-induced separation method. We also revealed that the binding energy between PSCs and sc-SWNTs was strongly affected by the side-chain length of PSCs, leading to the formation of a homogeneous nanohybrid film. The understanding of electrostatic interactions in the heterostructure and experimental results suggests criteria for the design of nanohybrid heterostructures.

Author-supplied keywords

  • binding energy
  • density of state
  • electrostatic interaction
  • polymer-carbon nanohybrid
  • printed transistors

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Authors

  • Do Hwan Kim

  • Hyeon Jin Shin

  • Hyo Sug Lee

  • Jiyoul Lee

  • Bang Lin Lee

  • Wi Hyoung Lee

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