Thin ferroelectric poly(vinylidene fluoride-chlorotrifluoro ethylene) films for thermal history independent non-volatile polymer memory

Richard Hahnkee Kim, Seok Ju Kang, Insung Bae, Yeon Sik Choi, Youn Jung Park, Cheolmin Park

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

In this study, we investigated the molecular and microstructures of thin poly(vinylidene fluoride-chlorotrifluoro ethylene) (PVDF-CTFE) copolymer films with three different CTFE compositions of 10, 15, 20 wt% with respect to PVDF in relation with their ferroelectric properties. All PVDF-CTFE annealed at 130°C showed consecutive TTTT trans conformation with β type crystals while films molten and re-crystallized from a temperature above their melting points exhibited α type crystals with characteristic TGTG conformation. Microstructures of the films treated with the two different thermal histories also supported the formation of β and α type crystals with hundreds of nanometer scale sphere caps and micron level spherulites, respectively. Interestingly, PVDF-CTFE films with both α and β type crystals gave rise to relatively high remnant polarization of approximately 4 μC/cm 2 in metal/ferroelectric/metal capacitors regardless of the composition of CTFE. The ferroelectric polarization of a PVDF-CTFE film independent of thermal processing history allowed a wide processing window and easy fabrication protocol, resulting in a non-volatile ferroelectric field effect transistor memory which exhibited saturated hysteresis loops with the current ON/OFF ratio of approximately 103 at ±60 V sweep and reliable data retention.

Original languageEnglish
Pages (from-to)491-497
Number of pages7
JournalOrganic Electronics
Volume13
Issue number3
DOIs
Publication statusPublished - 2012 Mar

Fingerprint

vinylidene
Ferroelectric materials
fluorides
Polymers
Ethylene
ethylene
histories
Data storage equipment
polymers
Crystals
tyrosyl-glutamyl-tyrosyl-glutamic acid
crystals
Conformations
Metals
Polarization
spherulites
microstructure
Microstructure
polarization
Hysteresis loops

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Chemistry(all)
  • Condensed Matter Physics
  • Materials Chemistry
  • Electrical and Electronic Engineering

Cite this

Kim, Richard Hahnkee ; Kang, Seok Ju ; Bae, Insung ; Choi, Yeon Sik ; Park, Youn Jung ; Park, Cheolmin. / Thin ferroelectric poly(vinylidene fluoride-chlorotrifluoro ethylene) films for thermal history independent non-volatile polymer memory. In: Organic Electronics. 2012 ; Vol. 13, No. 3. pp. 491-497.
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Thin ferroelectric poly(vinylidene fluoride-chlorotrifluoro ethylene) films for thermal history independent non-volatile polymer memory. / Kim, Richard Hahnkee; Kang, Seok Ju; Bae, Insung; Choi, Yeon Sik; Park, Youn Jung; Park, Cheolmin.

In: Organic Electronics, Vol. 13, No. 3, 03.2012, p. 491-497.

Research output: Contribution to journalArticle

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