Single-walled carbon-nanotubes-based organic memory structures

Sundes Fakher, Razan Nejm, Ahmad Ayesh, Amal Al-Ghaferi, Dagou Zeze, Mohammed Mabrook

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)

Abstract

The electrical behaviour of organic memory structures, based on single-walled carbon-nanotubes (SWCNTs), metal-insulator-semiconductor (MIS) and thin film transistor (TFT) structures, using poly(methyl methacrylate) (PMMA) as the gate dielectric, are reported. The drain and source electrodes were fabricated by evaporating 50 nm gold, and the gate electrode was made from 50 nm-evaporated aluminium on a clean glass substrate. Thin films of SWCNTs, embedded within the insulating layer, were used as the floating gate. SWCNTs-based memory devices exhibited clear hysteresis in their electrical characteristics (capacitance-voltage (C-V) for MIS structures, as well as output and transfer characteristics for transistors). Both structures were shown to produce reliable and large memory windows by virtue of high capacity and reduced charge leakage. The hysteresis in the output and transfer characteristics, the shifts in the threshold voltage of the transfer characteristics, and the flat-band voltage shift in the MIS structures were attributed to the charging and discharging of the SWCNTs floating gate. Under an appropriate gate bias (1 s pulses), the floating gate is charged and discharged, resulting in significant threshold voltage shifts. Pulses as low as 1 V resulted in clear write and erase states.

Original languageEnglish
Article number1166
JournalMolecules
Volume21
Issue number9
DOIs
Publication statusPublished - Sep 2016
Externally publishedYes

Keywords

  • Charge transfer
  • Organic memory devices
  • Pentacene
  • Single-walled carbon-nanotubes

ASJC Scopus subject areas

  • Analytical Chemistry
  • Chemistry (miscellaneous)
  • Molecular Medicine
  • Pharmaceutical Science
  • Drug Discovery
  • Physical and Theoretical Chemistry
  • Organic Chemistry

Fingerprint

Dive into the research topics of 'Single-walled carbon-nanotubes-based organic memory structures'. Together they form a unique fingerprint.

Cite this