Optimization of poly(vinylidene fluoride-trifluoroethylene) films as non-volatile memory for flexible electronics

Duo Mao, Manuel Angel Quevedo Quevedo-López, Harvey J. Stiegler, Bruce E. Gnade, Husam N. Alshareef

Research output: Contribution to journalArticlepeer-review

91 Scopus citations

Abstract

The impact of thermal treatment and thickness on the polarization and leakage current of poly(vinylidene fluoride-trifluoroethylene) [P(VDF-TrFE)] copolymer thin film capacitors has been studied. The evolution of the film morphology, crystallinity and bonding orientation as a function of annealing temperature and thickness were characterized using multiple techniques. Electrical performance of the devices was correlated with the material properties. It was found that annealing at or slightly above the Curie temperature (Tc) is the optimal temperature for high polarization, smooth surface morphology and low leakage current. Higher annealing temperature (but below the melting temperature Tm) favors larger size β crystallites through molecular chain self-organization, resulting in increased film roughness, and the vertical polarization tends to saturate. Metal-Ferroelectric-Metal (MFM) capacitors consistently achieved Ps, Pr and Vc of 8.5 μC/cm2, 7.4 μC/cm2 and 10.2 V, respectively.
Original languageEnglish (US)
Pages (from-to)925-932
Number of pages8
JournalOrganic Electronics
Volume11
Issue number5
DOIs
StatePublished - May 2010

ASJC Scopus subject areas

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

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