Characteristics of conjugated hydrocarbon based thin film transistor with ionic liquid gate dielectric

Yumiko Kaji; Keiko Ogawa; Ritsuko Eguchi; Hidenori Goto; Yasuyuki Sugawara; Takashi Kambe; Koki Akaike; Shin Gohda; Akihiko Fujiwara; Yoshihiro Kubozono

doi:10.1016/j.orgel.2011.08.016

Characteristics of conjugated hydrocarbon based thin film transistor with ionic liquid gate dielectric

Yumiko Kaji, Keiko Ogawa, Ritsuko Eguchi, Hidenori Goto, Yasuyuki Sugawara, Takashi Kambe, Koki Akaike, Shin Gohda, Akihiko Fujiwara, Yoshihiro Kubozono

Research output: Contribution to journal › Article

26 Citations (Scopus)

Abstract

Thin film transistors (TFTs) with ionic liquid gate dielectrics, [1-ethyl-3-methylimidazolium][bis(trifluoromethanesulfonyl)imide] (emim[TFSI]) and [1-butyl-3-methylimidazolium][hexafluorophosphate] (bmim[PF₆]), are fabricated with thin films of one dimensional (1D) hydrocarbon, [7]phenacene. P-channel characteristics are observed for [7]phenacene TFTs with both ionic liquids by use of platinum electrode. The field-effect mobility μ for [7]phenacene TFT with bmim[PF₆] was recorded to be 0.28 cm ² V^-1 s^-1. The value of absolute threshold voltage, |V_TH|, was less than 2.5 V, showing low-voltage operation. The accumulation of hole in the [7]phenacene TFTs with ionic liquids was confirmed from the voltage or time dependence of capacitance in metal-insulator-semiconductor structure, which shows that these TFTs operate electrochemically and the carriers are accumulated in the whole of [7]phenacene thin films.

Original language	English
Pages (from-to)	2076-2083
Number of pages	8
Journal	Organic Electronics
Volume	12
Issue number	12
DOIs	https://doi.org/10.1016/j.orgel.2011.08.016
Publication status	Published - Dec 2011

Keywords

Aromatic hydrocarbon
Electric double layer
Electrochemical transistor
Ionic liquid
Low voltage operation
Organic FET

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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Kaji, Y., Ogawa, K., Eguchi, R., Goto, H., Sugawara, Y., Kambe, T., Akaike, K., Gohda, S., Fujiwara, A., & Kubozono, Y. (2011). Characteristics of conjugated hydrocarbon based thin film transistor with ionic liquid gate dielectric. Organic Electronics, 12(12), 2076-2083. https://doi.org/10.1016/j.orgel.2011.08.016

Characteristics of conjugated hydrocarbon based thin film transistor with ionic liquid gate dielectric. / Kaji, Yumiko; Ogawa, Keiko; Eguchi, Ritsuko ; Goto, Hidenori; Sugawara, Yasuyuki; Kambe, Takashi; Akaike, Koki; Gohda, Shin; Fujiwara, Akihiko; Kubozono, Yoshihiro.

In: Organic Electronics, Vol. 12, No. 12, 12.2011, p. 2076-2083.

Research output: Contribution to journal › Article

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abstract = "Thin film transistors (TFTs) with ionic liquid gate dielectrics, [1-ethyl-3-methylimidazolium][bis(trifluoromethanesulfonyl)imide] (emim[TFSI]) and [1-butyl-3-methylimidazolium][hexafluorophosphate] (bmim[PF6]), are fabricated with thin films of one dimensional (1D) hydrocarbon, [7]phenacene. P-channel characteristics are observed for [7]phenacene TFTs with both ionic liquids by use of platinum electrode. The field-effect mobility μ for [7]phenacene TFT with bmim[PF6] was recorded to be 0.28 cm 2 V-1 s-1. The value of absolute threshold voltage, |VTH|, was less than 2.5 V, showing low-voltage operation. The accumulation of hole in the [7]phenacene TFTs with ionic liquids was confirmed from the voltage or time dependence of capacitance in metal-insulator-semiconductor structure, which shows that these TFTs operate electrochemically and the carriers are accumulated in the whole of [7]phenacene thin films.",

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author = "Yumiko Kaji and Keiko Ogawa and Ritsuko Eguchi and Hidenori Goto and Yasuyuki Sugawara and Takashi Kambe and Koki Akaike and Shin Gohda and Akihiko Fujiwara and Yoshihiro Kubozono",

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