ZnO nanowire field-effect transistors with Pt nanocrystals fabricated on a flexible plastic substrate for a non-volatile memory application

Myeongwon Lee, Youngin Jeon, Sangsig Kim

Research output: Contribution to journalArticlepeer-review

Abstract

In this work, a single ZnO nanowire field-effect transistor (NWFET) with discrete-trap storage nodes of Pt nanocrystals (NCs) embedded within Al 2O3, a high-κ tunneling/control dielectric material, was successfully fabricated on a flexible plastic substrate for a non-volatile memory application. The ZnO NWFET with embedded Pt NCs exhibits a clear hysteresis loop with a threshold voltage shift of 4.16 V under the ±15 V gate-source voltage sweep ranges, implying that the charging and discharging phenomena occur during the program/erase operations. The ZnO NWFET achieves a reasonable value of approximately 105 for the on/off current ratio for read-out of storage data. Furthermore, memory features, such as programming efficiency and on-cell current, are compared between the flat and convexly bent states in order to investigate the feasibility of flexible plastic devices as transistors.

Original languageEnglish
Pages (from-to)1912-1916
Number of pages5
JournalPhysica Status Solidi (A) Applications and Materials Science
Volume211
Issue number8
DOIs
Publication statusPublished - 2014 Aug

Keywords

  • ZnO
  • flexible substrates
  • nanocrystals
  • nanowires
  • non-volatile memory
  • platinum

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Electrical and Electronic Engineering
  • Materials Chemistry

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