Controlling the crystal formation in solution-process for organic field-effect transistors with high-performance

Chuan Liu, Yun Li, Yong Xu, Takeo Minari, Songlin Li, Kazuo Takimiya, Kazuhito Tsukagoshi

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

We control the growth of high-quality organic semiconducting crystals in the aim of transistor application. By finely tuning the processing parameters, both isolated crystals showing characteristic facet angles and irregular-shaped, thin crystalline domains are obtained in large sizes (>400 μm). Structural investigations indicate that the various shapes of crystals are in the same crystal structure, and reveal that the irregular-shaped crystalline domains are composed by terrace of molecularly flat regions, which can be up to hundreds of microns in size. When applied in field-effect transistors, the thin crystalline domains exhibit the best performance showing μFET up to 4.4 cm2/V s. This is an order of magnitude higher than that of the transistors made from as-spun films and thick crystals. The approach well demonstrates the importance of fine control of crystal formation and can be generally used for getting organic crystal transistors.

Original languageEnglish
Pages (from-to)2975-2984
Number of pages10
JournalOrganic Electronics
Volume13
Issue number12
DOIs
Publication statusPublished - 2012 Jan 1
Externally publishedYes

Keywords

  • Organic semiconductor
  • Single crystal
  • Transistor

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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