Photo-patternable ion gel-gated graphene transistors and inverters on plastic

Seoung Ki Lee, S. M. Humayun Kabir, Bhupendra K. Sharma, Beom Joon Kim, Jeong Ho Cho, Jong-Hyun Ahn

Research output: Contribution to journalArticle

32 Citations (Scopus)

Abstract

We demonstrate photo-patternable ion gel-gated graphene transistors and inverters on plastic substrates. The photo-patternable ion gel can be used as a negative photoresist for the patterning of underlying graphene as well as gate dielectrics. As a result, an extra graphene-patterning step is not required, which simplifies the device fabrication and avoids a side effect arising from the photoresist residue. The high capacitance of ion gel gate dielectrics yielded a low voltage operation (∼2 V) of the graphene transistor and inverter. The graphene transistors on plastic showed an on/off-current ratio of ∼11.5, along with hole and electron mobilities of 852 ± 124 and 452 ± 98 cm2 V-1 s-1, respectively. In addition, the flexible graphene inverter was successfully fabricated on plastic through the potential superposition effect from the drain bias. These devices show excellent mechanical flexibility and fatigue stability.

Original languageEnglish
Article number014002
JournalNanotechnology
Volume25
Issue number1
DOIs
Publication statusPublished - 2014 Jan 10

Fingerprint

Graphite
Graphene
Gels
Gate dielectrics
Photoresists
Ions
Plastics
Hole mobility
Electron mobility
Capacitance
Fatigue of materials
Fabrication
Electric potential
Substrates
Graphene transistors

All Science Journal Classification (ASJC) codes

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

Cite this

Lee, Seoung Ki ; Humayun Kabir, S. M. ; Sharma, Bhupendra K. ; Kim, Beom Joon ; Cho, Jeong Ho ; Ahn, Jong-Hyun. / Photo-patternable ion gel-gated graphene transistors and inverters on plastic. In: Nanotechnology. 2014 ; Vol. 25, No. 1.
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Photo-patternable ion gel-gated graphene transistors and inverters on plastic. / Lee, Seoung Ki; Humayun Kabir, S. M.; Sharma, Bhupendra K.; Kim, Beom Joon; Cho, Jeong Ho; Ahn, Jong-Hyun.

In: Nanotechnology, Vol. 25, No. 1, 014002, 10.01.2014.

Research output: Contribution to journalArticle

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AU - Lee, Seoung Ki

AU - Humayun Kabir, S. M.

AU - Sharma, Bhupendra K.

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AU - Cho, Jeong Ho

AU - Ahn, Jong-Hyun

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