Ink-jet printing of organic semiconductor for fabricating organic thin-film transistors: Film uniformity control by ink composition

Dongjo Kim; Sunho Jeong; Seong Hui Lee; Jooho Moon; Jun Kwang Song

doi:10.1016/j.synthmet.2009.02.025

Ink-jet printing of organic semiconductor for fabricating organic thin-film transistors: Film uniformity control by ink composition

Dongjo Kim
, Sunho Jeong
, Seong Hui Lee
, Jooho Moon
, Jun Kwang Song

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

14 Citations (Scopus)

Abstract

We have investigated the influence of solvent chemistry on ink-jet printed semiconductor patterns. Our research focuses on improving the uniformity of an ink-jet printed single dot semiconductor by adjusting the solvent mixture combination. Use of a solvent mixture with one solvent of a lower boiling point and a higher solubility with respect to the semiconductor molecules and another of a higher boiling point and a lower solubility allows us to produce a uniform single dot pattern by ink-jet printing. It was observed that the film uniformity of the semiconductor layer plays an important role in determining the electrical parameters of the transistor. In comparison with uncontrolled ink composition, the OTFT fabricated from the well-controlled ink exhibited better device performance, including a carrier mobility of 8.5 × 10^-3 cm² V^-1 s^-1 in the saturation regime, an on/off current ratio of 10³, and a threshold voltage of 0.39 V with subthreshold slopes of 0.95 V dec^-1.

Original language	English
Pages (from-to)	1381-1385
Number of pages	5
Journal	Synthetic Metals
Volume	159
Issue number	13
DOIs	https://doi.org/10.1016/j.synthmet.2009.02.025
Publication status	Published - Jul 2009

Bibliographical note

Funding Information:
This work was supported by the Korea Science and Engineering Foundation (KOSEF) through the National Research Laboratory Program funded by the Ministry of Science and Technology (No. R0A-2005-000-10011-0). It was also partially supported by the Second Stage of the Brain Korea 21 Project in 2008. J.K. Song thanks the Korea Science and Engineering Foundation (KOSEF) grant funded by the Korea Government (MOST) (No. M10300000320-06J0000-32010).

Copyright:
Copyright 2009 Elsevier B.V., All rights reserved.

Keywords

Ink
Ink-jet printing
Organic semiconductor
Organic thin-film transistor

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10.1016/j.synthmet.2009.02.025

Cite this

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title = "Ink-jet printing of organic semiconductor for fabricating organic thin-film transistors: Film uniformity control by ink composition",

abstract = "We have investigated the influence of solvent chemistry on ink-jet printed semiconductor patterns. Our research focuses on improving the uniformity of an ink-jet printed single dot semiconductor by adjusting the solvent mixture combination. Use of a solvent mixture with one solvent of a lower boiling point and a higher solubility with respect to the semiconductor molecules and another of a higher boiling point and a lower solubility allows us to produce a uniform single dot pattern by ink-jet printing. It was observed that the film uniformity of the semiconductor layer plays an important role in determining the electrical parameters of the transistor. In comparison with uncontrolled ink composition, the OTFT fabricated from the well-controlled ink exhibited better device performance, including a carrier mobility of 8.5 × 10-3 cm2 V-1 s-1 in the saturation regime, an on/off current ratio of 103, and a threshold voltage of 0.39 V with subthreshold slopes of 0.95 V dec-1.",

keywords = "Ink, Ink-jet printing, Organic semiconductor, Organic thin-film transistor",

author = "Dongjo Kim and Sunho Jeong and Lee, \{Seong Hui\} and Jooho Moon and Song, \{Jun Kwang\}",

note = "Funding Information: This work was supported by the Korea Science and Engineering Foundation (KOSEF) through the National Research Laboratory Program funded by the Ministry of Science and Technology (No. R0A-2005-000-10011-0). It was also partially supported by the Second Stage of the Brain Korea 21 Project in 2008. J.K. Song thanks the Korea Science and Engineering Foundation (KOSEF) grant funded by the Korea Government (MOST) (No. M10300000320-06J0000-32010). Copyright: Copyright 2009 Elsevier B.V., All rights reserved.",

year = "2009",

month = jul,

doi = "10.1016/j.synthmet.2009.02.025",

language = "English",

volume = "159",

pages = "1381--1385",

journal = "Synthetic Metals",

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AU - Kim, Dongjo

AU - Jeong, Sunho

AU - Lee, Seong Hui

AU - Moon, Jooho

AU - Song, Jun Kwang

N1 - Funding Information: This work was supported by the Korea Science and Engineering Foundation (KOSEF) through the National Research Laboratory Program funded by the Ministry of Science and Technology (No. R0A-2005-000-10011-0). It was also partially supported by the Second Stage of the Brain Korea 21 Project in 2008. J.K. Song thanks the Korea Science and Engineering Foundation (KOSEF) grant funded by the Korea Government (MOST) (No. M10300000320-06J0000-32010). Copyright: Copyright 2009 Elsevier B.V., All rights reserved.

PY - 2009/7

Y1 - 2009/7

N2 - We have investigated the influence of solvent chemistry on ink-jet printed semiconductor patterns. Our research focuses on improving the uniformity of an ink-jet printed single dot semiconductor by adjusting the solvent mixture combination. Use of a solvent mixture with one solvent of a lower boiling point and a higher solubility with respect to the semiconductor molecules and another of a higher boiling point and a lower solubility allows us to produce a uniform single dot pattern by ink-jet printing. It was observed that the film uniformity of the semiconductor layer plays an important role in determining the electrical parameters of the transistor. In comparison with uncontrolled ink composition, the OTFT fabricated from the well-controlled ink exhibited better device performance, including a carrier mobility of 8.5 × 10-3 cm2 V-1 s-1 in the saturation regime, an on/off current ratio of 103, and a threshold voltage of 0.39 V with subthreshold slopes of 0.95 V dec-1.

AB - We have investigated the influence of solvent chemistry on ink-jet printed semiconductor patterns. Our research focuses on improving the uniformity of an ink-jet printed single dot semiconductor by adjusting the solvent mixture combination. Use of a solvent mixture with one solvent of a lower boiling point and a higher solubility with respect to the semiconductor molecules and another of a higher boiling point and a lower solubility allows us to produce a uniform single dot pattern by ink-jet printing. It was observed that the film uniformity of the semiconductor layer plays an important role in determining the electrical parameters of the transistor. In comparison with uncontrolled ink composition, the OTFT fabricated from the well-controlled ink exhibited better device performance, including a carrier mobility of 8.5 × 10-3 cm2 V-1 s-1 in the saturation regime, an on/off current ratio of 103, and a threshold voltage of 0.39 V with subthreshold slopes of 0.95 V dec-1.

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KW - Organic thin-film transistor

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ER -

Ink-jet printing of organic semiconductor for fabricating organic thin-film transistors: Film uniformity control by ink composition

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