Printable ferroelectric PVDF/PMMA blend films with ultralow roughness for low voltage non-volatile polymer memory

Seok Ju Kang, Youn Jung Park, Insung Bae, Kap Jin Kim, Ho Cheol Kim, Siegfried Bauer, Edwin L. Thomas, Cheolmin Park

Research output: Contribution to journalArticle

163 Citations (Scopus)

Abstract

Here, a facile route to fabricate thin ferroelectric polyvinylidene fluoride) (PVDF)/poly(methylmethacrylate) (PMMA) blend films with very low surface roughness based on spin-coating and subsequent melt-quenching is described. Amorphous PMMA in a blend film effectively retards the rapid crystallization of PVDF upon quenching, giving rise to a thin and flat ferroelectric film with nanometer scale β-type PVDF crystals. The still, flat interfaces of the blend film with metal electrode and/or an organic semiconducting channel layer enable fabrication of a highly reliable ferroelectric capacitor and transistor memory unit operating at voltages as low as 15 V. For instance, with a TIPS-pentacene single crystal as an active semi-conducting layer, a flexible ferroelectric field effect transistor shows a clockwise I-V hysteresis with a drain current bistability of 103 and data retention time of more than 15h at ±15 V gate voltage. Furthermore, the robust interfacial homogeneity of the ferroelectric film is highly beneficial for transfer printing in which arrays of metal/ferroelectric/metal micro-capacitors are developed over a large area with well defined edge sharpness.

Original languageEnglish
Pages (from-to)2812-2818
Number of pages7
JournalAdvanced Functional Materials
Volume19
Issue number17
DOIs
Publication statusPublished - 2009 Sep 9

    Fingerprint

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

Cite this