Synthesis and binary/ternary write-once read-many-times electrical memory behaviors of carbazole-based polyimides bearing flexible linkage segment
| Autor: | Juqing Liu, Yanhua Yang, Hang Lu, Yingzhong Shen |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Pyromellitic dianhydride
Materials science Polymers and Plastics Carbazole Organic Chemistry General Physics and Astronomy 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology BPDA 01 natural sciences 0104 chemical sciences Threshold voltage Crystallography chemistry.chemical_compound chemistry Write once read many Diamine Materials Chemistry Thermal stability 0210 nano-technology Ternary operation |
| Zdroj: | European Polymer Journal. 108:10-19 |
| ISSN: | 0014-3057 |
| DOI: | 10.1016/j.eurpolymj.2018.08.009 |
| Popis: | An efficient and readily available novel carbazole-based aromatic diamine was synthesized and characterized. Two polyimides (PI-a and PI-b) were prepared via a two-step procedure using the new synthesized diamine reacting with low-cost and the commercialized pyromellitic dianhydride (PMDA) and 3,3′,4,4′-biphenyltetracarboxylic dianhydride (BPDA), respectively. PIs were characterized and exhibited highly organo-solubility and thermal stability. The Al/PI-a/ITO device showed binary write-once read-many-times (WORM) behavior with an ON/OFF current ratio up to 109 and the threshold voltage as low as −0.21 V, whereas the Al/PI-b/ITO device presented ternary WORM behavior with an ON2/ON1/OFF current ratio up to 105:104:1 and the switching voltage below −3 V. The memory switching mechanisms were further elucidated through molecular simulation based on the density functional theory (DFT) method. This provides an effective strategy to achieve a ternary memory device. |
| Databáze: | OpenAIRE |
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