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Organic Thin-Film Transistors Fabricated with Alignment-Free Printing Technique

Published online by Cambridge University Press:  17 March 2011

Masahiko Ando ,
Masahiro Kawasaki ,
Shuji Imazeki ,
Hiroshi Sasaki  and
Toshihide Kamata
Masahiko Ando
Affiliation:
Optoelectronic Industry and Technology Development Association (OITDA) 1-1, Higashi 1-Chome, Tsukuba-shi, Ibaraki-ken, 305-8565, Japan Adavanced Research Laboratory, Hitachi, Ltd. 1-1, Omika-cho 7-chome, Hitachi-shi, Ibaraki-ken, 319-1292, Japan
Masahiro Kawasaki
Affiliation:
Optoelectronic Industry and Technology Development Association (OITDA) 1-1, Higashi 1-Chome, Tsukuba-shi, Ibaraki-ken, 305-8565, Japan Adavanced Research Laboratory, Hitachi, Ltd. 1-1, Omika-cho 7-chome, Hitachi-shi, Ibaraki-ken, 319-1292, Japan
Shuji Imazeki
Affiliation:
Optoelectronic Industry and Technology Development Association (OITDA) 1-1, Higashi 1-Chome, Tsukuba-shi, Ibaraki-ken, 305-8565, Japan Adavanced Research Laboratory, Hitachi, Ltd. 1-1, Omika-cho 7-chome, Hitachi-shi, Ibaraki-ken, 319-1292, Japan
Hiroshi Sasaki
Affiliation:
Hitachi Research Laboratory, Hitachi, Ltd. 1-1, Omika-cho 7-chome, Hitachi-shi, Ibaraki-ken, 319-1292, Japan
Toshihide Kamata
Affiliation:
National Institute of Advanced Industrial Science and Technology (AIST) 1-1, Higashi 1-Chome, Tsukuba-shi, Ibaraki-ken, 305-8565, Japan
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Abstract

A novel process for fabricating alignment-free, printable, organic thin-film transistors is presented. This process exploits a self-assembly phenomenon in which soluble nanomaterials such as metal nanoparticles and organic molecules are self-assembled into a device structure. To demonstrate this process, solution-processed source and drain electrodes were self-aligned to a gate electrode by using a hydrophobic self-assembled monolayer (SAM) optically patterned onto the gate electrode with a back-substrate exposure technique. An organic semiconductor film deposited on the patterned SAM was selectively ordered and substantially self-aligned to the gate electrode. A field-effect mobility of 0.15 cm2/Vs and on/off current ratio of 105 were experimentally demonstrated when pentacene molecules were used as the semiconductor and silver nanoparticles were used as electrode materials.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 814: Symposium I – Flexible Electronics 2004-Materials and Device Technology , 2004 , I10.19
Copyright
Copyright © Materials Research Society 2004

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