Compact Ga-doped ZnO nanorod thin film for making high-performance transparent resistive switching memory

Chun Yang Huang*, Yen Ting Ho, Chung Jung Hung, Tseung-Yuen Tseng

*Corresponding author for this work

Research output: Contribution to journalArticle

28 Scopus citations

Abstract

Fully transparent and stable resistive switching characteristics in resistive random access memory (RRAM) device consisting of ITO/Ga doped ZnO (GZO)/ZnO/ITO architecture are proposed. The GZO nanorods with well aligned and extremely dense properties are considered as a thin film for RRAM device. The oxygen vacancies can be confined and migrate along grain boundaries in the GZO nanorod film. Therefore, the weakest point for formation and rupture of conductive filament can be limited at the interface between GZO nanorod film and ZnO seeding layer. Compared with ITO/ZnO/ITO device, a significant improvement in the distribution of high resistance state (HRS) and low resistance state (LRS) during resistance switching is demonstrated in the present device. In addition, a high endurance of more than 7000 cycles with the resistance ratios of HRS/LRS about 200 times is achieved in this device. The ITO/GZO/ZnO/ITO device is a good candidate for the transparent RRAM application.

Original languageEnglish
Article number6875903
Pages (from-to)3435-3441
Number of pages7
JournalIEEE Transactions on Electron Devices
Volume61
Issue number10
DOIs
StatePublished - 1 Oct 2014

Keywords

  • Endurance
  • Ga doped
  • grain boundary
  • nanorod
  • orientation
  • resistive random access memory (RRAM)
  • resistive switching (RS)
  • transparent
  • ZnO

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