Simple Solvent Engineering for High-Mobility and Thermally Robust Conjugated Polymer Nanowire Field-Effect Transistors

Gyeong G. Jeon, Myeongjae Lee, Jinwoo Nam, Wongi Park, Minyong Yang, Jong-Ho Choi, Dong Ki Yoon, Eunji Lee, Bongsoo Kim, Jong H. Kim

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Electron donor (D)-acceptor (A)-type conjugated polymers (CPs) have emerged as promising semiconductor candidates for organic field-effect transistors. Despite their high charge carrier mobilities, optimization of electrical properties of D-A-type CPs generally suffers from complicated post-deposition treatments such as high-temperature thermal annealing or solvent-vapor annealing. In this work, we report a high-mobility diketopyrrolopyrrole-based D-A-type CP nanowires, self-assembled by a simple but very effective solvent engineering method that requires no additional processes after film deposition. In situ grown uniform nanowires at room temperature were shown to possess distinct edge-on chain orientation that is beneficial for lateral charge transport between source and drain electrodes in FETs. FETs based on the polymer nanowire networks exhibit impressive hole mobility of up to 4.0 cm 2 V -1 s -1 . Moreover, nanowire FETs showed excellent operational stability in high temperature up to 200 °C because of the strong interchain interaction and alignment.

Original languageEnglish
Pages (from-to)29824-29830
Number of pages7
JournalACS Applied Materials and Interfaces
Volume10
Issue number35
DOIs
Publication statusPublished - 2018 Sep 5

Keywords

  • conjugated polymers
  • Hansen solubility parameters
  • high-mobility
  • nanowires
  • organic field-effect transistors
  • stability

ASJC Scopus subject areas

  • Materials Science(all)

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