Droplet manipulation by an external electric field for crystalline film growth

Takeshi Komino, Hirokazu Kuwabara, Masaaki Ikeda, Masayuki Yahiro, Kazuo Takimiya, Chihaya Adachi

研究成果: Article査読

13 被引用数 (Scopus)

抄録

Combining droplet manipulation by the application of an electric field with inkjet printing is proposed as a unique technique to control the surface wettability of substrates for solution-processed organic field-effect transistors (FETs). With the use of this technique, uniform thin films of 2,7-dioctyl[1]benzothieno[2,3,-b][1]benzothiopene (C8-BTBT) could be fabricated on the channels of FET substrates without self-assembled monolayer treatment. High-speed camera observation revealed that the crystals formed at the solid/liquid interface. The coverage of the crystals on the channels depended on the ac frequency of the external electric field applied during film formation, leading to a wide variation in the carrier transport of the films. The highest hole mobility of 0.03 cm2 V-1 s-1 was obtained when the coverage was maximized with an ac frequency of 1 kHz.

本文言語English
ページ(範囲)9592-9597
ページ数6
ジャーナルLangmuir
29
30
DOI
出版ステータスPublished - 2013 7 30
外部発表はい

ASJC Scopus subject areas

  • 電気化学
  • 凝縮系物理学
  • 表面および界面
  • 材料科学(全般)
  • 分光学

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