Solution-crystallized n-type organic thin-film transistors: An impact of branched alkyl chain on high electron mobility and thermal durability

Shohei Kumagai, Masahiro Nakano, Kazuo Takimiya, Jun Takeya

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)

Abstract

Single-crystal organic thin-film field-effect transistors (OTFTs) have been actively studied because they are regarded as an ideal platform for charge carrier transport phenomena in small-molecule organic materials. Moreover, recently developed solution-based techniques to grow single-crystalline thin films have attracted industrial attention beyond fundamental physics. In this work, one of the solution-based techniques, namely, the edgecasting method, was employed to study single-crystal OTFTs of n-type organic semiconductors, dimerized naphtho[2,3-b]thiophene diimides, with linear and branched alkyl chains. A high electron mobility of >1 cm2 V−1 s−1 and an excellent thermal durability were observed in the branched alkyl-chain derivative, while the OTFT based on linear alkyl-substituted one showed clear degradation of mobility after thermal annealing. Therefore, this work will demonstrate a potential availability of branched alkyl chains for improving carrier mobility and thermal durability with large-scalable printing methods.

Original languageEnglish
Pages (from-to)548-553
Number of pages6
JournalOrganic Electronics
Volume62
DOIs
Publication statusPublished - 2018 Nov

Keywords

  • Branched alkyl chain
  • High electron mobility
  • N-type organic thin-film transistors
  • Solution process
  • Thermal durability

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Chemistry(all)
  • Condensed Matter Physics
  • Materials Chemistry
  • Electrical and Electronic Engineering

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