Characterization of current transport in ferroelectric polymer devices

Amir Hanna, Unnat Sampatraj Bhansali, Yasser Khan, Husam N. Alshareef

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

We report the charge injection characteristics in poly(vinylidene fluoride-trifluoroethylene), P(VDF-TrFE), as a function of electrode material in metal/ferroelectric/metal device structures. Symmetric and asymmetric devices with Al, Ag, Au and Pt electrodes were fabricated to determine the dominant carrier type, injection current density, and to propose transport mechanisms in the ferroelectric polymer. Higher work function metals such as Pt are found to inject less charges compared to lower work function metals, implying n-type conduction behavior for P(VDF-TrFE) with electrons as the dominant injected carrier. Two distinct charge transport regimes were identified in the P(VDF-TrFE) devices; a Schottky-limited conduction regime for low to intermediate fields (E < 20 MV/m), and a space-charge limited conduction (SCLC) regime for high fields (20 < E < 120 MV/m). Implication of these results for degradation in P(VDF-TrFE) memory performance are discussed. © 2013 Elsevier B.V. All rights reserved.
Original languageEnglish (US)
Pages (from-to)22-28
Number of pages7
JournalOrganic Electronics
Volume15
Issue number1
DOIs
StatePublished - Jan 2014

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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