Paper of the Week: Programmable digital nonvolatile memory

Graphical abstract: Programmable digital nonvolatile memory behaviors of donor–acceptor polyimides bearing triphenylamine derivatives: effects of substituents

The world market for nonvolatile memory devices has grown rapidly as the demand for mobile devices has increased. The high-performance polymers based on aromatic polyimides (PIs) under development yield many advantages and several PIs have been introduced as the active materials in nonvolatile memory devices. The authors reported here the effects of substituents on the electrical memory characteristics of poly(4,4′-aminotriphenylene hexafluoroisopropylidenediphthalimide) (6F-TPA PI) analogs prepared from two different triphenylamine (TPA) derivatives. These PIs exhibited various types of memory behavior, namely, unipolar WORM and ON/OFF switching-type memory and bipolar ON/OFF switching type memory, depending on the incorporated substituents. The underlying switching mechanism was investigated, and the interfaces between the PI films and the metal electrodes in devices were examined.

Programmable digital nonvolatile memory behaviors of donor–acceptor polyimides bearing triphenylamine derivatives: effects of substituents by Taek Joon Lee, Yong-Gi Ko, Hung-Ju Yen, Kyungtae Kim, Dong Min Kim, Wonsang Kwon, Suk Gyu Hahm, Guey-Sheng Liou and Moonhor Ree Polym. Chem., 20123, 1276-1283.

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