%0 Journal Article %@ 1567-1739 %A Chae, Kwanbyung %A Nguyen, Duc Cuong %A Ryu, Shinyoung %A Yeom, Dong-Il %A Lee, Soonil %A Park, Ji-Yong %D 2018 %F SisLab:3147 %I Elsevier B.V. %J Current Applied Physics %N 5 %P 500-504 %T Electrical properties of ion gels based on PVDF-HFP applicable as gate stacks for flexible devices %U https://eprints.uet.vnu.edu.vn/eprints/id/eprint/3147/ %V 18 %X Electrical characteristics of ion gels prepared by loading different amounts of 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ([EMIM][TFSI]) in Poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP) are investigated and compared with those of ion liquid, [EMIM][TFSI] for possible application as a gate stack for flexible electronic devices. Capacitance and impedance as a function of frequency are measured, which can be well accounted for by a simple circuit model identifying the local device components. The operation of a flexible field effect transistor based on graphene and the ion gel as a top gate stack is also demonstrated.