Flexible graphene-PZT ferroelectric nonvolatile memory

Wonho Lee, Orhan Kahya, Chee Tat Toh, Barbaros Özyilmaz, Jong Hyun Ahn

Research output: Contribution to journalArticle

37 Citations (Scopus)

Abstract

We report the fabrication of a flexible graphene-based nonvolatile memory device using Pb(Zr0.35,Ti0.65)O3 (PZT) as the ferroelectric material. The graphene and PZT ferroelectric layers were deposited using chemical vapor deposition and sol-gel methods, respectively. Such PZT films show a high remnant polarization (Pr) of 30 μC cm -2 and a coercive voltage (Vc) of 3.5 V under a voltage loop over ±11 V. The graphene-PZT ferroelectric nonvolatile memory on a plastic substrate displayed an on/off current ratio of 6.7, a memory window of 6 V and reliable operation. In addition, the device showed one order of magnitude lower operation voltage range than organic-based ferroelectric nonvolatile memory after removing the anti-ferroelectric behavior incorporating an electrolyte solution. The devices showed robust operation in bent states of bending radii up to 9 mm and in cycling tests of 200 times. The devices exhibited remarkable mechanical properties and were readily integrated with plastic substrates for the production of flexible circuits.

Original languageEnglish
Article number475202
JournalNanotechnology
Volume24
Issue number47
DOIs
Publication statusPublished - 2013 Nov 29

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Graphite
Graphene
Ferroelectric materials
Data storage equipment
Electric potential
Plastics
Substrates
Sol-gel process
Electrolytes
Chemical vapor deposition
Polarization
Fabrication
Mechanical properties
Networks (circuits)

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering
  • Electrical and Electronic Engineering

Cite this

Lee, Wonho ; Kahya, Orhan ; Toh, Chee Tat ; Özyilmaz, Barbaros ; Ahn, Jong Hyun. / Flexible graphene-PZT ferroelectric nonvolatile memory. In: Nanotechnology. 2013 ; Vol. 24, No. 47.
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Flexible graphene-PZT ferroelectric nonvolatile memory. / Lee, Wonho; Kahya, Orhan; Toh, Chee Tat; Özyilmaz, Barbaros; Ahn, Jong Hyun.

In: Nanotechnology, Vol. 24, No. 47, 475202, 29.11.2013.

Research output: Contribution to journalArticle

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AU - Lee, Wonho

AU - Kahya, Orhan

AU - Toh, Chee Tat

AU - Özyilmaz, Barbaros

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