Droplet manipulation by an external electric field for crystalline film growth

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

doi:10.1021/la401729k

Droplet manipulation by an external electric field for crystalline film growth

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

Applied Chemistry

Research output: Contribution to journal › Article › peer-review

16 Citations (Scopus)

Abstract

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.

Original language	English
Pages (from-to)	9592-9597
Number of pages	6
Journal	Langmuir
Volume	29
Issue number	30
DOIs	https://doi.org/10.1021/la401729k
Publication status	Published - Jul 30 2013

All Science Journal Classification (ASJC) codes

Materials Science(all)
Condensed Matter Physics
Surfaces and Interfaces
Spectroscopy
Electrochemistry

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10.1021/la401729k

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title = "Droplet manipulation by an external electric field for crystalline film growth",

abstract = "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.",

author = "Takeshi Komino and Hirokazu Kuwabara and Masaaki Ikeda and Masayuki Yahiro and Kazuo Takimiya and Chihaya Adachi",

note = "Funding Information: Acknowledgements This study was partly supported by research grants from the Australian Research Council, Charles Sturt University, NSW, Australia, and the University of Wollongong, NSW, Australia.",

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AU - Komino, Takeshi

AU - Kuwabara, Hirokazu

AU - Ikeda, Masaaki

AU - Yahiro, Masayuki

AU - Takimiya, Kazuo

AU - Adachi, Chihaya

N1 - Funding Information: Acknowledgements This study was partly supported by research grants from the Australian Research Council, Charles Sturt University, NSW, Australia, and the University of Wollongong, NSW, Australia.

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Y1 - 2013/7/30

N2 - 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.

AB - 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.

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Droplet manipulation by an external electric field for crystalline film growth

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All Science Journal Classification (ASJC) codes

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