Jump to main content
Jump to site search

Issue 14, 2018
Previous Article Next Article

Highly uniform supramolecular nano-films derived from carbazole-containing perylene diimide via surface-supported self-assembly and their electrically bistable memory behavior

Author affiliations

Abstract

For electrical memory applications, two perylenetetracarboxylic diimide (PDI) derivatives, N,N′-(6-carbazole hexyl)-1,7-di(4-tert-butylphenoxy)perylene-3,4,9,10-tetracarboxylic diimide (PDI-6Cz) and N,N′-(2-carbazole ethyl)-1,7-di(4-tert-butylphenoxy)perylene-3,4,9,10-tetracarboxylic diimide (PDI-2Cz), were synthesized and their surface-supported self-assembly behaviors were investigated. PDI-2Cz tends to self-organize into regular rods, which are proved to be hexagonal lattices with single crystal nature, based on which memory device fabrication and electrically bistable behavior evaluation are technically infeasible. Whereas PDI-6Cz readily self-assembles into highly uniform nano-films with a considerably smooth surface, in which the X-ray diffraction study indicates strong π–π stacking between the aromatic skeletons. Further characterization indicates that sandwich memory devices using a PDI-6Cz nano-film as the active layer exhibit reprogrammable flash-type memory behavior with a switching-on voltage of ca. 0.8 V and an ON/OFF current ratio of 104. Besides, the devices exhibit excellent long-term operation stability, enduring up to 108 reading cycles without obvious current variation and an ultrafast switching response period of less than 20 ns. Photophysical and electrochemical measurements and DFT molecular simulations were conducted to determine the electronic transition occurring in the supramolecular self-assembled nano-film. Compared with organic storage materials based on polymers, the current memory device exhibits lower threshold voltage and more rapid response speed, which provides a new way for developing high-performance organic data storage materials.

Graphical abstract: Highly uniform supramolecular nano-films derived from carbazole-containing perylene diimide via surface-supported self-assembly and their electrically bistable memory behavior

Back to tab navigation

Supplementary files

Publication details

The article was received on 21 Mar 2018, accepted on 17 May 2018 and first published on 22 May 2018


Article type: Paper
DOI: 10.1039/C8NJ01380B
Citation: New J. Chem., 2018,42, 11506-11515
  •   Request permissions

    Highly uniform supramolecular nano-films derived from carbazole-containing perylene diimide via surface-supported self-assembly and their electrically bistable memory behavior

    Q. U. Khan, G. Tian, L. Bao, S. Qi and D. Wu, New J. Chem., 2018, 42, 11506
    DOI: 10.1039/C8NJ01380B

Search articles by author

Spotlight

Advertisements