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Vol. 34, No. 8(3), S&M3042

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Vol. 32, No. 8(2), S&M2292

Print: ISSN 0914-4935
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Sensors and Materials
is an international peer-reviewed open access journal to provide a forum for researchers working in multidisciplinary fields of sensing technology.
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Sensors and Materials, Volume 19, Number 8 (2007)
Copyright(C) MYU K.K.
pp. 487-496
S&M699 Research Paper of Special Issue
Published: 2007

Fabrication of Direct-Printed OTFT Array Using Flexible h-PDMS Stamp [PDF]

Jeongdai Jo, Taik-Min Lee, Jong-Su Yu, Chung-Hwan Kim, Dong-Soo Kim, Eung-Sug Lee and Masayoshi Esashi

(Received May 8, 2007; Accepted September 7, 2007)

Keywords: microcontact printing, direct printing, organic thin-film transistor, printed OTFT, h-PDMS stamp

Printed organic thin-film transistors (OTFTs) for use as a switching device in an organic light-emitting diode (OLED) were fabricated by microcontact and direct printing at room temperature. The printed OTFT was used in the fabrication of a printed gate with source and drain electrodes (W/L = 500 μm/5 μm, 500 μm/10 μm, and 500 μm/20 μm) printed using a hard poly (dimethylsiloxane) (h-PDMS) stamp and low-viscosity Ag ink, a spin coated parylene-C gate dielectric, and a soluble poly (3-hexylthiophene-2,5-dily) (P3HT) organic semiconductor on flexible, transparent poly(ethylenenaphthalate) (PEN) plastic substrates. The printed OTFT was characterized and the following parameters were obtained: a mobility of 0.06 (±0.02) cm2/Vs, an on/off current ratio of 103, and a subthreshold slope of 2.53 V/decade. Also, it was possible to fabricate a printed OTFT with channel lengths down to 5 μm, and reduce the fabrication process by 20 steps compared with photolithography.

Corresponding author: Eung-Sug Lee


Cite this article
Jeongdai Jo, Taik-Min Lee, Jong-Su Yu, Chung-Hwan Kim, Dong-Soo Kim, Eung-Sug Lee and Masayoshi Esashi, Fabrication of Direct-Printed OTFT Array Using Flexible h-PDMS Stamp, Sens. Mater., Vol. 19, No. 8, 2007, p. 487-496.



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