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Assembly and Characterization of Biomolecular Memristors Consisting of Ion Channel-doped Lipid Membranes
Published on: March 9, 2019
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Charge Carrier Transport Mechanism Based on Stable Low Voltage Organic Bistable Memory Device
Journal of Nanoscience and Nanotechnology
|October 28, 2015
Summary
Researchers developed a solution-processed organic memory device using PMMA/ZnO/PMMA films. This bistable memory device shows excellent ON/OFF ratios and stability for low-power digital memory applications.
Area of Science:
- Materials Science
- Organic Electronics
- Device Physics
Background:
- Organic bistable memory devices offer potential for low-cost, flexible electronics.
- Efficient charge transport mechanisms are crucial for reliable memory performance.
Purpose of the Study:
- To fabricate and characterize a solution-processed organic bistable memory device.
- To investigate the charge transport mechanisms governing the device's memory behavior.
Main Methods:
- Fabrication of a two-terminal device using polymethyl methacrylate (PMMA)/zinc oxide (ZnO)/PMMA films on ITO-coated glass.
- Electrical characterization including voltage sweeping, retention tests, and cycle testing.
- Analysis of charge carrier transport mechanisms (thermionic emission, space-charge-limited current, Fowler-Nordheim tunneling).
Main Results:
- The device exhibited favorable switching characteristics with an ON/OFF ratio > 1 x 10^4 within a -2 V to +3 V voltage sweep.
- Stable memory states were maintained after bias removal and demonstrated no degradation after 1 hour at 120°C.
- Memory functionality remained consistent over fifty operational cycles.
Conclusions:
- The developed organic memory device shows promising performance for digital memory applications.
- Charge transport during writing is explained by thermionic emission and SCLC mechanisms.
- The erasing process is attributed to Fowler-Nordheim tunneling, indicating a multi-mechanism switching behavior.
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