Organic bistable devices utilizing carbon nanotubes embedded in poly(methyl methacrylate)

Sleiman, A. and Mabrook, M.F. and Nejm, R.R. and Ayesh, A. and Al Ghaferi, A. and Petty, M.C. and Zeze, D.A. (2012) Organic bistable devices utilizing carbon nanotubes embedded in poly(methyl methacrylate). JOURNAL OF APPLIED PHYSICS, 112. 024509. DOI: 10.1063/1.4737599

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The electrical and memory behavior of organic bistable memory devices in the form of metal-embedded insulator-metal (MIM) structure are described. The devices utilize layer-by-layer (LbL) deposited single walled carbon nanotubes (SWCNTs) as charge traps embedded between two polymethylmethacrylate (PMMA) insulating layers. The stack was sandwiched between two aluminium electrodes to form an Al/PMMA/SWCNTs/PMMA/Al structure. The current-voltage (I-V) characteristics of the devices exhibit electrical bistability and non-volatile memory characteristics in terms of switching between high conductive (ON) and low conductive (OFF) states. The different conductive states were programmed by application of a positive and negative voltage pulse for the ON and OFF states, respectively. A maximum ON/OFF ratio of 2���105 is achieved at low reading voltage of 1�V. Space-charge-limited-current (SCLC) conduction model was used to describe the carriers transport and the electrical bistability in the devices, which was attributed to the trapping and detrapping of electrons inside the SWCNTs.

Item Type: Article
Subjects: Research Publications
Departments: College of Physical and Applied Sciences > School of Electronic Engineering
Date Deposited: 04 Jul 2015 02:18
Last Modified: 23 Sep 2015 03:12
ISSN: 0021-8979
URI: http://e.bangor.ac.uk/id/eprint/4722
Identification Number: DOI: 10.1063/1.4737599
Publisher: AIP Publishing
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