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Iridium(iii) complex-containing non-conjugated polymers for non-volatile memory induced by switchable through-space charge transfer

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Abstract

Organic memory devices have recently attracted considerable interest to combat the increasing demands of data storage. Herein, taking advantage of the electron-deficient nature of iridium(III) complexes and the flexible polymer skeleton of non-conjugated polymers, a series of novel non-conjugated iridium(III) complex-containing polymers P2–P5 with non-volatile memory properties, and the corresponding model polymer P1, were rationally designed and synthesized. The memory effect of P1 is a static random-access memory type, while that of the polymers containing iridium(III) complexes are flash types. The ON/OFF current ratio of the devices based on P3 is as high as 103 and the device has good stability. It exhibits a long retention time of 104 s and both ON and OFF states, which survive up to more than 105 read cycles. The introduction of an iridium(III) complex contributes to the charge-transfer states from carbazole moieties to the iridium(III) complex, which also improves the crystallinity of polymers and realizes electrical bistability.

Graphical abstract: Iridium(iii) complex-containing non-conjugated polymers for non-volatile memory induced by switchable through-space charge transfer

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Supplementary files

Article information


Submitted
14 Feb 2020
Accepted
10 Mar 2020
First published
10 Mar 2020

J. Mater. Chem. C, 2020, Advance Article
Article type
Paper

Iridium(III) complex-containing non-conjugated polymers for non-volatile memory induced by switchable through-space charge transfer

B. Yang, P. Tao, C. Ma, R. Tang, T. Gong, S. Liu and Q. Zhao, J. Mater. Chem. C, 2020, Advance Article , DOI: 10.1039/D0TC00765J

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