Thin reduced graphene oxide interlayer with a conjugated block copolymer for high performance non-volatile ferroelectric polymer memory

Dhinesh Babu Velusamy, Richard Hahnkee Kim, Kazuto Takaishi, Tsuyoshi Muto, Daisuke Hashizume, Soyoon Lee, Masanobu Uchiyama, Tetsuya Aoyama, Jean Charles Ribierre, Cheolmin Park

研究成果: ジャーナルへの寄稿学術誌査読

13 被引用数 (Scopus)

抄録

Polymer ferroelectric-gate field effect transistors (Fe-FETs) employing ferroelectric polymer thin films as gate insulators are highly attractive as a next-generation non-volatile memory. For minimizing gate leakage current of a device which arises from electrically defective ferroelectric polymer layer in particular at low operation voltage, the materials design of interlayers between the ferroelectric insulator and gate electrode is essential. Here, we introduce a new solution-processed interlayer of conductive reduced graphene oxides (rGOs) modified with a conjugated block copolymer, poly(styrene-block- paraphenylene) (PS-b-PPP). A FeFET with a solution-processed p-type oligomeric semiconducting channel and ferroelectric poly(vinylidene fluoride-co- trifluoroethylene) (PVDF-TrFE) insulator exhibited characteristic source-drain current hysteresis arising from ferroelectric polarization switching of a PVDF-TrFE insulator. Our PS-b-PPP modified rGOs (PMrGOs) with conductive moieties embedded in insulating polymer matrix not only significantly reduced the gate leakage current but also efficiently lowered operation voltage of the device. In consequence, the device showed large memory gate voltage window and high ON/OFF source-drain current ratio with excellent data retention and read/write cycle endurance. Furthermore, our PMrGOs interlayers were successfully employed to FeFETs fabricated on mechanically flexible substrates with promising non-volatile memory performance under repetitive bending deformation.

本文言語英語
ページ(範囲)2719-2727
ページ数9
ジャーナルOrganic Electronics
15
11
DOI
出版ステータス出版済み - 11月 2014

!!!All Science Journal Classification (ASJC) codes

  • 電子材料、光学材料、および磁性材料
  • 化学 (全般)
  • 生体材料
  • 凝縮系物理学
  • 電子工学および電気工学
  • 材料化学

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