Low operating voltage organic transistors and circuits with anodic titanium oxide and phosphonic acid self-assembled monolayer dielectrics

Hiroaki Jinno, Tomoyuki Yokota, Naoji Matsuhisa, Martin Kaltenbrunner, Yutaro Tachibana, Takao Someya

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

We fabricated organic thin-film transistors (OTFTs) with sub-1 V driving voltage enabled by a hybrid dielectric comprising high-k amorphous titanium oxide (TiOx) and a phosphonic acid self-assembled monolayer (SAM). The p-type OTFTs show a high on/off ratio (105), a near 0 V threshold voltage (−0.09 V), and a high mobility of 1.2 cm2/Vs when operated at 1 V. These OTFTs are readily employed in circuit applications, and we show pseudo-CMOS and CMOS inverters operating at 0.5 V as basic building blocks of low-voltage advanced organic logic circuits. We fabricate a five-stage CMOS ring oscillator that displays clear oscillation characteristics at a driving voltage of 0.5 V to highlight the potential of our hybrid dielectric for ultra-low-voltage integrated plastic circuitry.

Original languageEnglish
Pages (from-to)58-64
Number of pages7
JournalOrganic Electronics
Volume40
DOIs
Publication statusPublished - 2017 Jan 1

Keywords

  • Low driving-voltage
  • Organic thin-film transistors
  • Ring oscillators

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Chemistry(all)
  • Condensed Matter Physics
  • Materials Chemistry
  • Electrical and Electronic Engineering

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