Volume 60, Issue 52 pp. 27135-27143
Research Article

Towards High-Performance Resistive Switching Behavior through Embedding a D-A System into 2D Imine-Linked Covalent Organic Frameworks

Chenyu Li

Chenyu Li

Beijing National Laboratory for Molecular Sciences, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190 P. R. China

School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing, 100049 P. R. China

These authors contributed equally to this work.

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Dong Li

Dong Li

Beijing National Laboratory for Molecular Sciences, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190 P. R. China

School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing, 100049 P. R. China

These authors contributed equally to this work.

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Dr. Weifeng Zhang

Dr. Weifeng Zhang

Beijing National Laboratory for Molecular Sciences, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190 P. R. China

These authors contributed equally to this work.

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Hao Li

Hao Li

Beijing National Laboratory for Molecular Sciences, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190 P. R. China

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Prof. Gui Yu

Corresponding Author

Prof. Gui Yu

Beijing National Laboratory for Molecular Sciences, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190 P. R. China

School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing, 100049 P. R. China

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First published: 29 September 2021
Citations: 68

Graphical Abstract

Two D-A-type covalent organic frameworks have been designed and prepared following a novel strategy for the construction of endurable and reliable memory devices. The state-of-the-art memristor-based COF-TT-BT thin film showed typical rewritable resistive switching behavior, a high ON/OFF current ratio (ca. 105), good endurance of 319 cycles, and a long retention time of 3.3×104 s.

Abstract

Developing new materials for the fabrication of resistive random-access memory is of great significance in this period of big data. Herein, we present a novel design strategy of embedding donor (D) and acceptor (A) fragments into imine-linked frameworks to construct resistive switching covalent organic frameworks (COFs) for high-performance memristors. Two D-A-type two-dimensional COFs, COF-BT-TT and COF-TT-TVT, were designed and synthesized using a conventional solvothermal approach, and high-quality thin films of these materials deposited on ITO substrate exhibited great potential as an active layer for memristors. Rewritable memristors based on 100 nm thick COF-TT-BT and COF-TT-TVT films showed a high ON/OFF current ratio (ca. 105 and 104) and low driving voltage (1.30 and 1.60 V). The cycle period and retention time for COF-TT-BT-based rewritable devices were as high as 319 cycles and 3.3×104 s at a constant voltage of 0.1 V (160 cycles and 1.2×104 s for the COF-TT-TVT memristor).

Conflict of interest

The authors declare no conflict of interest.

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