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

21 Citations (Scopus)


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
Issue number17
Publication statusPublished - 2015 May 7


All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Chemistry

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