Electrical performance of polymer ferroelectric capacitors fabricated on plastic substrate using transparent electrodes

Unnat Sampatraj Bhansali, Yasser Khan, Husam N. Alshareef

Research output: Contribution to journalArticlepeer-review

15 Scopus citations

Abstract

Polymer-based flexible ferroelectric capacitors have been fabricated using a transparent conducting oxide (ITO) and a transparent conducting polymer (PEDOT:PSS). It is found that the polarization fatigue performance with transparent oxide electrodes exhibits a significant improvement over the polymer electrodes (20% vs 70% drop in polarization after 10 6 cycles). This result can be explained based on a charge injection model that is controlled by interfacial band-offsets, and subsequent pinning of ferroelectric domain walls by the injected carriers. Furthermore, the coercive field (E c) of devices with our polymer electrodes is nearly 40% lower than reported values with similar polymer electrodes. Surprisingly, this difference was found to be related to the dry etching process used to define the top electrodes, which is reported for the first time by this group. The temperature dependence of relative permittivity of both devices shows a typical first order ferroelectric-to-paraelectric phase transition, but with a reduced Curie temperature compared to reference devices fabricated on Pt. © 2012 Elsevier B.V. All rights reserved.
Original languageEnglish (US)
Pages (from-to)1541-1545
Number of pages5
JournalOrganic Electronics
Volume13
Issue number9
DOIs
StatePublished - Sep 2012

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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