• 文献标题:   Graphene Oxide: Graphene Quantum Dot Nanocomposite for Better Memristic Switching Behaviors
  • 文献类型:   Article
  • 作  者:   LI L
  • 作者关键词:   tristable memristic switching, allinorganic multibit memory, chargetrap memristor, go, gqds nanocomposite
  • 出版物名称:   NANOMATERIALS
  • ISSN:  
  • 通讯作者地址:   Heilongjiang Univ
  • 被引频次:   0
  • DOI:   10.3390/nano10081448
  • 出版年:   2020

▎ 摘  要

Tristable memristic switching provides the capability for multi-bit data storage. In this study, all-inorganic multi-bit memory devices were successfully manufactured by the attachment of graphene quantum dots (GQDs) onto graphene oxide (GO) through a solution-processable method. By means of doping GQDs as charge-trapping centers, the device indium-tin oxide (ITO)/GO:0.5 wt%GQDs/Ni revealed controllable memristic switching behaviors that were tunable from binary to ternary, and remarkably enhanced in contrast with ITO/GO/Ni. It was found that the device has an excellent performance in memristic switching parameters, with a SET1, SET2 and RESET voltage of -0.9 V, -1.7 V and 5.15 V, as well as a high ON2/ON1/OFF current ratio (10(3):10(2):1), and a long retention time (10(4)s) together with 100 successive cycles. The conduction mechanism of the binary and ternary GO-based memory cells was discussed in terms of experimental data employing a charge trapping-detrapping mechanism. The reinforcement effect of GQDs on the memristic switching of GO through cycle-to-cycle operation has been extensively investigated, offering great potential application for multi-bit data storage in ultrahigh-density, nonvolatile memory.