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

Do Hwan Kim, Hyeon Jin Shin, Hyo Sug Lee, Jiyoul Lee, Bang Lin Lee, Wi Hyoung Lee, Jong Hwa Lee, Kilwon Cho, Woo Jae Kim, Sang Yoon Lee, Jae Young Choi, Jong Min Kim

Research output: Contribution to journalArticlepeer-review

26 Scopus citations

Abstract

Figure Persented: 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.

Original languageEnglish
Pages (from-to)662-670
Number of pages9
JournalACS Nano
Volume6
Issue number1
DOIs
StatePublished - 24 Jan 2012

Keywords

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

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