A robust ionic liquid-polymer gate insulator for high-performance flexible thin film transistors

Jieun Ko, Su Jeong Lee, Kyongjun Kim, Eung Kyu Lee, Keon Hee Lim, Jae Min Myoung, Jeeyoung Yoo, Youn Sang Kim

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

Herein, we propose an ionic liquid-polymer dielectric layer for flexible electronics reinforced by a chemical interaction between the polymer matrix (PVP) and the ionic liquid. Due to the robust structures of the cross-linked PVP matrix and hydrogen bonding between the ionic liquid and PVP, the ionic liquid-PVP (IL-PVP) layer exhibited a good mechanical strength when bending up to 1000 times and a stable thermal behaviour up to 300 °C. Furthermore, the IL-PVP dielectric layer showed a high capacitance value of ∼2 μF cm-2 and was operated well as a gate insulator for flexible ZnO thin film transistors with a linear field-effect mobility of ∼3.3 cm2 V-1 s-1 at a gate bias of 3 V.

Original languageEnglish
Pages (from-to)4239-4243
Number of pages5
JournalJournal of Materials Chemistry C
Volume3
Issue number17
DOIs
Publication statusPublished - 2015 May 7

Fingerprint

Ionic Liquids
Thin film transistors
Ionic liquids
Polymers
Flexible electronics
Polymer matrix
Strength of materials
Hydrogen bonds
Capacitance

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Chemistry

Cite this

Ko, Jieun ; Lee, Su Jeong ; Kim, Kyongjun ; Lee, Eung Kyu ; Lim, Keon Hee ; Myoung, Jae Min ; Yoo, Jeeyoung ; Kim, Youn Sang. / A robust ionic liquid-polymer gate insulator for high-performance flexible thin film transistors. In: Journal of Materials Chemistry C. 2015 ; Vol. 3, No. 17. pp. 4239-4243.
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A robust ionic liquid-polymer gate insulator for high-performance flexible thin film transistors. / Ko, Jieun; Lee, Su Jeong; Kim, Kyongjun; Lee, Eung Kyu; Lim, Keon Hee; Myoung, Jae Min; Yoo, Jeeyoung; Kim, Youn Sang.

In: Journal of Materials Chemistry C, Vol. 3, No. 17, 07.05.2015, p. 4239-4243.

Research output: Contribution to journalArticle

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AU - Ko, Jieun

AU - Lee, Su Jeong

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AU - Myoung, Jae Min

AU - Yoo, Jeeyoung

AU - Kim, Youn Sang

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AB - Herein, we propose an ionic liquid-polymer dielectric layer for flexible electronics reinforced by a chemical interaction between the polymer matrix (PVP) and the ionic liquid. Due to the robust structures of the cross-linked PVP matrix and hydrogen bonding between the ionic liquid and PVP, the ionic liquid-PVP (IL-PVP) layer exhibited a good mechanical strength when bending up to 1000 times and a stable thermal behaviour up to 300 °C. Furthermore, the IL-PVP dielectric layer showed a high capacitance value of ∼2 μF cm-2 and was operated well as a gate insulator for flexible ZnO thin film transistors with a linear field-effect mobility of ∼3.3 cm2 V-1 s-1 at a gate bias of 3 V.

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