Organic single crystal transistor characteristics of single-crystal phase pentacene grown by ionic liquid-assisted vacuum deposition

Yoko Takeyama; Shimpei Ono; Yuji Matsumoto

doi:10.1063/1.4747148

Organic single crystal transistor characteristics of single-crystal phase pentacene grown by ionic liquid-assisted vacuum deposition

Yoko Takeyama, Shimpei Ono, Yuji Matsumoto

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

42 Citations (Scopus)

Abstract

Organic transistor characteristics of single-crystal phase pentacene were investigated. Ionic liquids (ILs) were used as not only a gate dielectric material in the transistors but also a crystallization solvent in vacuum deposition of pentacene. The crystal sizes reached 200 μm and their surface exhibits a molecularly step-and-terrace structure. There was no sign of IL molecules inside the crystal, and the impurity level of 6,13-pentacenequinone was also reduced. The average value of the field-effect mobility was not so inferior to those for the conventional pentacene single crystals, and the highest value exceeded 5 cm ²/Vs, with the on/off current ratio of 10 ⁴.

Original language	English
Article number	083303
Journal	Applied Physics Letters
Volume	101
Issue number	8
DOIs	https://doi.org/10.1063/1.4747148
Publication status	Published - 2012 Aug 20
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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title = "Organic single crystal transistor characteristics of single-crystal phase pentacene grown by ionic liquid-assisted vacuum deposition",

abstract = "Organic transistor characteristics of single-crystal phase pentacene were investigated. Ionic liquids (ILs) were used as not only a gate dielectric material in the transistors but also a crystallization solvent in vacuum deposition of pentacene. The crystal sizes reached 200 μm and their surface exhibits a molecularly step-and-terrace structure. There was no sign of IL molecules inside the crystal, and the impurity level of 6,13-pentacenequinone was also reduced. The average value of the field-effect mobility was not so inferior to those for the conventional pentacene single crystals, and the highest value exceeded 5 cm 2/Vs, with the on/off current ratio of 10 4.",

author = "Yoko Takeyama and Shimpei Ono and Yuji Matsumoto",

note = "Funding Information: The authors would like to thank to Mr. A. Genseki at Center for Advanced Materials Analysis, National University Cooperation Tokyo Institute of Technology for TOF-SIMS measurement. This work was supported by the Incorporated Administrative Agency, New Energy and Industrial Technology Development Organization (NEDO) under the Ministry of Economy, Trade and Industry (METI). Copyright: Copyright 2012 Elsevier B.V., All rights reserved.",

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AU - Takeyama, Yoko

AU - Ono, Shimpei

AU - Matsumoto, Yuji

N1 - Funding Information: The authors would like to thank to Mr. A. Genseki at Center for Advanced Materials Analysis, National University Cooperation Tokyo Institute of Technology for TOF-SIMS measurement. This work was supported by the Incorporated Administrative Agency, New Energy and Industrial Technology Development Organization (NEDO) under the Ministry of Economy, Trade and Industry (METI). Copyright: Copyright 2012 Elsevier B.V., All rights reserved.

PY - 2012/8/20

Y1 - 2012/8/20

N2 - Organic transistor characteristics of single-crystal phase pentacene were investigated. Ionic liquids (ILs) were used as not only a gate dielectric material in the transistors but also a crystallization solvent in vacuum deposition of pentacene. The crystal sizes reached 200 μm and their surface exhibits a molecularly step-and-terrace structure. There was no sign of IL molecules inside the crystal, and the impurity level of 6,13-pentacenequinone was also reduced. The average value of the field-effect mobility was not so inferior to those for the conventional pentacene single crystals, and the highest value exceeded 5 cm 2/Vs, with the on/off current ratio of 10 4.

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