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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
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
Copyright
Copyright © Materials Research Society 2004

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