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Issue 23, 2013
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Bistable memory devices with lower threshold voltage by extending the molecular alkyl-chain length

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Abstract

Three organic small molecules with alkyl chains of different lengths based on an azobenzene scaffold were designed and synthesized. The indium-tin oxide (ITO)–Azo–Al sandwich memory devices showed write-once-read-many-times (WORM) characteristics. The switch threshold voltage of Azo-based memory devices significantly decreased as the end-capping alkyl chain extends, which is totally consistent with the AFM and X-ray diffraction results that the thin films showed smoother morphologies and closer intermolecular packing with the molecular alkyl-chain length prolonging. These results demonstrated that variation in the alkyl-chain length at the end of the conjugated molecules is a powerful strategy for tuning film microstructure and intermolecular packing to enable high performance of the fabricated sandwiched devices.

Graphical abstract: Bistable memory devices with lower threshold voltage by extending the molecular alkyl-chain length

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Publication details

The article was received on 01 Feb 2013, accepted on 15 Apr 2013 and first published on 17 Apr 2013


Article type: Paper
DOI: 10.1039/C3CP51290H
Citation: Phys. Chem. Chem. Phys., 2013,15, 9212-9218
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    Bistable memory devices with lower threshold voltage by extending the molecular alkyl-chain length

    W. Ren, Y. Zhu, J. Ge, X. Xu, R. Sun, N. Li, H. Li, Q. Xu, J. Zheng and J. Lu, Phys. Chem. Chem. Phys., 2013, 15, 9212
    DOI: 10.1039/C3CP51290H

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