Polysilsesquioxanes for gate-insulating materials of organic thin-film transistors

Kimihiro Matsukawa*, Mitsuru Watanabe, Takashi Hamada, Takashi Nagase, Hiroyoshi Naito

*この研究の対応する著者

研究成果: Review article査読

14 被引用数 (Scopus)

抄録

Printable organic thin-film transistor (O-TFT) is one of the most recognized technical issues nowadays. Our recent progress on the formation of organic-inorganic hybrid thin films consists of polymethylsilsesquioxane (PMSQ), and its applications for the gate-insulating layer of O-TFTs are introduced in this paper. PMSQ synthesized in toluene solution with formic acid catalyst exhibited the electric resistivity of higher than 1014 ω cm after thermal treatment at 150°C, and the very low concentration of residual silanol groups in PMSQ was confirmed. The PMSQ film contains no mobile ionic impurities, and this is also important property for the practical use for the gate-insulating materials. In the case of top-contact type TFT using poly(3-hexylthiophene) (P3HT) with PMSQ gate-insulating layer, the device properties were comparable with the TFTs having thermally grown SiO2 gate-insulating layer. The feasibility of PMSQ as a gate-insulating material for O-TFTs, which was fabricated on a flexible plastic substrate, has been demonstrated. Moreover, by the modification of PMSQ, further functionalities, such as surface hydrophobicity, high permittivity that allows low driving voltage, and photocurability that allows photolithography, could be appended to the PMSQ gate-insulating layers.

本文言語English
論文番号852063
ジャーナルInternational Journal of Polymer Science
2012
DOI
出版ステータスPublished - 2012
外部発表はい

ASJC Scopus subject areas

  • ポリマーおよびプラスチック

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