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Fabrication of Organic Thin Film Transistor Arrays on Plastic and Paper Substrate for Flexible Display Application

Published online by Cambridge University Press:  18 March 2014

Y. Fujisaki ,
Y. Nakajima ,
M. Nakata ,
H. Tsuji  and
T. Yamamoto
Y. Fujisaki
Affiliation:
NHK Science and Technology Research Laboratories, Kinuta, Setagaya-ku, Tokyo 157-8510, Japan.
Y. Nakajima
Affiliation:
NHK Science and Technology Research Laboratories, Kinuta, Setagaya-ku, Tokyo 157-8510, Japan.
M. Nakata
Affiliation:
NHK Science and Technology Research Laboratories, Kinuta, Setagaya-ku, Tokyo 157-8510, Japan.
H. Tsuji
Affiliation:
NHK Science and Technology Research Laboratories, Kinuta, Setagaya-ku, Tokyo 157-8510, Japan.
T. Yamamoto
Affiliation:
NHK Science and Technology Research Laboratories, Kinuta, Setagaya-ku, Tokyo 157-8510, Japan.
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Abstract

Organic thin-film transistors (OTFTs) are the most promising candidates for flexible electronics owing to their flexible structures, the simplicity of processing large-area devices, and excellent compatibility with flexible substrates. To date, many studies have been reported that have aimed at developing a wide range of plastic electronics such as flexible displays, sensors. In this paper, we discuss our recent work, focusing on OTFT arrays and their application to flexible display. An active-matrix (AM) backplane using a low-temperature cross-linkable olefin-type polymer as the gatedielectric and an air-stable DNTT as the organic semiconductor (OSC) was successfully fabricated on a plastic substrate. The short-channel TFT array exhibited a high hole mobility of over 0.5 cm2/Vs, a low subthreshold slope of 0.31, and excellent environmental and operational stability. A 5-inch flexible OLED display exhibited a high luminescence of over 300 cd/m2 by driving of the DNTT-based OTFTs. Solution-processed OTFTs are also attracting considerable attention owing to both their simple manufacturing process and excellent transistor performance. We present a simple patterning process for a solution-processable OSC that can be used to develop a high-mobility short-channel TFT array. The OSC film was directly patterned on the confined active channel region by a simple lamination coating technique and the resulting TFTs showed a high mobility of up to 1.3 cm2/Vs. In the final section, we report on eco-friendly paper-based organic TFT array. A transparent cellulose nanofibers paper was firstly applied to a flexible substrate for the TFT backplane. A solution-processed TFT on the transparent paper exhibited a high mobility exceeding 1 cm2/Vs, good air stability, and excellent mechanical stability.

Keywords

organicsemiconductingdisplay
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1628: Symposium M – Large-Area Processing and Patterning for Active Optical and Electronic Devices , 2014 , mrsf13-1628-m02-04
Copyright
Copyright © Materials Research Society 2014 

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References

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