Ordered ferroelectric PVDF-TrFE thin films by high throughput epitaxy for nonvolatile polymer memory

Youn Jung Park, Seok Ju Kang, Bernard Lotz, Martin Brinkmann, Annette Thierry, Kap Jin Kim, Cheolmin Park

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Abstract

High throughput epitaxy of a thin ferroelectric poly(vinylidene fluoride-co-trifluoroethylene) (PVDF-TrFE) film is demonstrated on a molecularly ordered poly(tetrafluoroethylene) (PTFE) substrate based on spin coating method over the area of a few centimeter square. The lattice match between (010) PVDF-TrFE and (100)PTFE results in b and c axes of PVDF-TrFE crystals preferentially parallel to a and c of PTFE, respectively and consequently produces global ordering of the edge-on PVDF-TrFE crystalline lamellae aligned perpendicular to the rubbing direction of PTFE, its c-axis. The epitaxially grown PVDF-TrFE film is successfully incorporated for arrays of ferroelectric capacitors that exhibit not only the significant reduction of ferroelectric thermal hysteresis but also the descent remanent polarization at very low effective operating voltage of ±5 V maintained to 88% of its initial value after number of fatigue cycles of 5 × 108 in the mode of bipolar pulse switching. A ferroelectric field effect transistor memory with epitaxially grown PVDF-TrFE layer as gate dielectric shows the saturated I-V hysteresis with bistable on/off ratio of approximately 102.

Original languageEnglish
Pages (from-to)8648-8654
Number of pages7
JournalMacromolecules
Volume41
Issue number22
DOIs
Publication statusPublished - 2008 Nov 25

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All Science Journal Classification (ASJC) codes

  • Organic Chemistry
  • Polymers and Plastics
  • Inorganic Chemistry
  • Materials Chemistry

Cite this

Park, Y. J., Kang, S. J., Lotz, B., Brinkmann, M., Thierry, A., Kim, K. J., & Park, C. (2008). Ordered ferroelectric PVDF-TrFE thin films by high throughput epitaxy for nonvolatile polymer memory. Macromolecules, 41(22), 8648-8654. https://doi.org/10.1021/ma801495k