期刊
MACROMOLECULAR CHEMISTRY AND PHYSICS
卷 212, 期 21, 页码 2360-2370出版社
WILEY-BLACKWELL
DOI: 10.1002/macp.201100373
关键词
charge transfer; memory capability; polyimide; synthesis; thermal properties
资金
- State Key Laboratory of ASIC & System, Fudan University [09KF001]
As part of a strategy to explore highly functionalized macromolecular semiconductors, two novel polyimides consisting of electron-donating carbazole and triphenylamine side groups are synthesized and characterized. Polyimide films sandwiched between an indium-tin oxide (ITO) bottom electrode and Al top electrode exhibit two accessible conductivity states and can be switched from the low-conductivity state to the high-conductivity state. Memory devices with the configuration of Al/PI(CzBD-DPBPDA)/ITO exhibit bipolar flash-type memory characteristics while that of Al/PI(TPABD-DPBPDA)/ITO demonstrate excellent unipolar ON and OFF switching behavior. Both devices show high ON/OFF current ratios up to 10(4) and long retention times of 10(4) s in ambient atmosphere.
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