Preparation of nanocomposite-based high performance organic field effect transistor via solution floating method and mechanical property evaluation

Youn Kim, Yeon Ju Kwon, Seungwan Ryu, Cheol Jin Lee, Jea Uk Lee

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

We demonstrate that using nanocomposite thin films consisting of semiconducting polymer, poly(3-hexylthiophene) (P3HT), and electrochemically exfoliated graphene (EEG) for the active channel layer of organic field-effect transistors (OFETs) improves both device performances and mechanical properties. The nanocomposite film was developed by directly blending P3HT solution with a dispersion of EEG at various weight proportions and simply transferring to an Si/SiO2 substrate by the solution floating method. The OFET based on P3HT/EEG nanocomposite film showed approximately twice higher field-effect mobility of 0.0391 cm2·V-1·s-1 and one order of magnitude greater on/off ratio of ~104 compared with the OFET based on pristine P3HT. We also measured the mechanical properties of P3HT/EEG nanocomposite film via film-on-elastomer methods, which confirms that the P3HT/EEG nanocomposite film exhibited approximately 2.4 times higher modulus (3.29 GPa) than that of the P3HT film (1.38 GPa), while maintaining the good bending flexibility and durability over 10.0% of bending strain and bending cycles (1000 cycles). It was proved that the polymer hybridization technique, which involves adding EEG to a conjugated polymer, is a powerful route for enhancing both device performances and mechanical properties while maintaining the flexible characteristics of OFET devices.

Original languageEnglish
Article number1046
JournalPolymers
Volume12
Issue number5
DOIs
Publication statusPublished - 2020 May 1

Bibliographical note

Funding Information:
Funding: This work was supported by the Principal Research Program (SI2011-30) of the Korea Research Institute of Chemical Technology (KRICT) and Technology Innovation Program (20006820, Development of automated system for electrochemical exfoliation of synthetic graphite production residue and multifunctional composites) funded by the Ministry of Trade, Industry & Energy (MOTIE, Korea).

Publisher Copyright:
© 2020 by the authors.

Keywords

  • Electrochemically exfoliated graphene
  • Film-on-elastomer
  • Nanocomposites
  • Organic field-effect transistor
  • Solution floating method

ASJC Scopus subject areas

  • General Chemistry
  • Polymers and Plastics

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