Issue 26, 2017

Multi-functional polyimides containing tetraphenyl fluorene moieties: fluorescence and resistive switching behaviors

Abstract

Two novel aromatic polyimides (PIs), TPF27OPI and TPF99OPI, with a tetraphenyl fluorene (TPF) unit as the electron donor (D) and a 4,4′-oxydiphthalic dianhydride (ODPA) unit as the electron acceptor (A) were synthesized and characterized. Both of the as-synthesized PIs showed obvious photoluminescence properties, and compared with TPF27OPI, where the fluorene unit is located in the polymer main chain, TPF99OPI with a fluorene unit in the side chain showed stronger fluorescence and a fluorescence blue shift in the film state. The memory device with a sandwich configuration of ITO/TPF27OPI/Al showed the nonvolatile “write once, read many” (WORM) switching behavior, while that of ITO/TPF99OPI/Al exhibited “static random access memory” (SRAM) switching behavior. Both of the devices exhibited a stable ON/OFF current ratio above 104 and a long operation time, following 104 pulse reading cycles with no obvious degradation in current. The mechanism of the resistive switching behaviors was discussed using the experimental and molecular simulation results. These multi-functional polyimides showed attractive potential applications in the field of polymer optoelectronic devices and memory devices.

Graphical abstract: Multi-functional polyimides containing tetraphenyl fluorene moieties: fluorescence and resistive switching behaviors

Supplementary files

Article information

Article type
Paper
Submitted
25 apr 2017
Accepted
05 iyn 2017
First published
05 iyn 2017

J. Mater. Chem. C, 2017,5, 6457-6466

Multi-functional polyimides containing tetraphenyl fluorene moieties: fluorescence and resistive switching behaviors

L. Qu, S. Huang, Y. Zhang, Z. Chi, S. Liu, X. Chen and J. Xu, J. Mater. Chem. C, 2017, 5, 6457 DOI: 10.1039/C7TC01807J

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