Flexible ambipolar organic field-effect transistors with reverse-offset-printed silver electrodes for a complementary inverter

Junsu Park, Minseok Kim, Seung Won Yeom, Hyeon Jun Ha, Hyenggun Song, Young Min Jhon, Yun Hi Kim, Byeong Kwon Ju

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

We report ambipolar organic field-effect transistors and complementary inverter circuits with reverse-offset-printed (ROP) Ag electrodes fabricated on a flexible substrate. A diketopyrrolopyrrole-based co-polymer (PDPP-TAT) was used as the semiconductor and poly(methyl methacrylate) was used as the gate insulator. Considerable improvement is observed in the n-channel electrical characteristics by inserting a cesium carbonate (Cs2CO3) as the electron-injection/hole-blocking layer at the interface between the semiconductors and the electrodes. The saturation mobility values are 0.35 cm2 V-1 s-1 for the p-channel and 0.027 cm2 V-1 s-1 for the n-channel. A complementary inverter is demonstrated based on the ROP process, and it is selectively controlled by the insertion of Cs2CO3 onto the n-channel region via thermal evaporation. Moreover, the devices show stable operation during the mechanical bending test using tensile strains ranging from 0.05% to 0.5%. The results confirm that these devices have great potential for use in flexible and inexpensive integrated circuits over a large area.

Original languageEnglish
Article number225302
JournalNanotechnology
Volume27
Issue number22
DOIs
Publication statusPublished - 2016 Apr 26

Fingerprint

Organic field effect transistors
Semiconductors
Silver
Electrodes
Semiconductor materials
Equipment and Supplies
Electron injection
Thermal evaporation
Tensile strain
Bending tests
Cesium
Polymethyl Methacrylate
Polymethyl methacrylates
Integrated circuits
Carbonates
Polymers
Hot Temperature
Electrons
Injections
Networks (circuits)

Keywords

  • ambipolarity
  • complementary inverter
  • field-effect transistors
  • organic semiconductor
  • printed electronics
  • reverse offset printing

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Electrical and Electronic Engineering
  • Mechanical Engineering
  • Mechanics of Materials
  • Materials Science(all)

Cite this

Flexible ambipolar organic field-effect transistors with reverse-offset-printed silver electrodes for a complementary inverter. / Park, Junsu; Kim, Minseok; Yeom, Seung Won; Ha, Hyeon Jun; Song, Hyenggun; Min Jhon, Young; Kim, Yun Hi; Ju, Byeong Kwon.

In: Nanotechnology, Vol. 27, No. 22, 225302, 26.04.2016.

Research output: Contribution to journalArticle

Park, Junsu ; Kim, Minseok ; Yeom, Seung Won ; Ha, Hyeon Jun ; Song, Hyenggun ; Min Jhon, Young ; Kim, Yun Hi ; Ju, Byeong Kwon. / Flexible ambipolar organic field-effect transistors with reverse-offset-printed silver electrodes for a complementary inverter. In: Nanotechnology. 2016 ; Vol. 27, No. 22.
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