Parylene-C and high-k polymer bilayer gate dielectric for low-operating voltage organic field-effect transistors

Tomoyuki Ashimine, Tomoaki Onoue, Takeshi Yasuda, Katsuhiko Fujita, Tetsuo Tsutsui

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

We propose a way to fabricate polymer insulators with a high gate capacitance for low-operating voltage organic field-effect transistors (OFETs). The insulator consists of spin-coated cyanoethylpullulan as a high-k polymer and chemical vapor deposited parylene-C as a covering layer. Parylene-C layer is insoluble in a common organic solvent, so the dielectric system can be fabricated on a layer of solution processable organic semiconductors such as poly(9,9-dioctylfluorene-co-bithiophene) (F8T2). The OFET shows a field-effect mobility of 3.410-3cm2/Vs,a threshold voltage of-1V, and an on/off current ratio of 5.9102. We successfully observed low-voltage operation in OFETs with this dielectric system.

Original languageEnglish
Pages (from-to)221-227
Number of pages7
JournalMolecular Crystals and Liquid Crystals
Volume471
Issue number1
DOIs
Publication statusPublished - Jan 1 2007

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Organic field effect transistors
Gate dielectrics
Polymers
field effect transistors
polymers
Electric potential
electric potential
insulators
Semiconducting organic compounds
organic semiconductors
Threshold voltage
threshold voltage
Organic solvents
low voltage
coverings
Capacitance
capacitance
Vapors
vapors
parylene

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Parylene-C and high-k polymer bilayer gate dielectric for low-operating voltage organic field-effect transistors. / Ashimine, Tomoyuki; Onoue, Tomoaki; Yasuda, Takeshi; Fujita, Katsuhiko; Tsutsui, Tetsuo.

In: Molecular Crystals and Liquid Crystals, Vol. 471, No. 1, 01.01.2007, p. 221-227.

Research output: Contribution to journalArticle

Ashimine, Tomoyuki ; Onoue, Tomoaki ; Yasuda, Takeshi ; Fujita, Katsuhiko ; Tsutsui, Tetsuo. / Parylene-C and high-k polymer bilayer gate dielectric for low-operating voltage organic field-effect transistors. In: Molecular Crystals and Liquid Crystals. 2007 ; Vol. 471, No. 1. pp. 221-227.
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