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Published on: April 8, 2018
Polymer-ultrathin graphite sheet-polymer composite structured flexible nonvolatile bistable organic memory devices
Dong Ick Son1, Jae Ho Shim, Dong Hee Park
1Future Convergence Research Division, Korea Institute of Science and Technology, Cheongryang, Seoul, Korea.
Nanotechnology
|June 21, 2011
Summary
Flexible bistable organic memory (BOM) devices using ultrathin graphite sheets (UGS) demonstrate stable electrical and memory characteristics even after repeated bending. These findings highlight the potential of UGS-based materials for durable flexible electronics.
Area of Science:
- Materials Science
- Organic Electronics
- Nanotechnology
Background:
- Flexible electronic devices require robust memory components with stable performance under mechanical stress.
- Organic memory devices offer potential for low-cost, large-area applications but often face challenges with durability.
- Ultrathin graphite sheets (UGS) present unique electronic properties for advanced material applications.
Purpose of the Study:
- To investigate the electrical bistability and memory stability of flexible bistable organic memory (BOM) devices.
- To analyze the memory mechanisms in three-layer structured BOM devices fabricated with ultrathin graphite sheets (UGS).
- To evaluate the performance of these BOM devices under both flat and bent conditions.
Main Methods:
- Fabrication of three-layer BOM devices using poly(methylmethacrylate) (PMMA) and UGS.
- Transmission electron microscopy (TEM) for microstructural analysis of PMMA/UGS/PMMA films.
- Electrical characterization including current-voltage (I-V), current-time (I-t), and current-cycle measurements under varying mechanical stress.
Main Results:
- The fabricated BOM devices exhibited stable electrical bistability and memory characteristics.
- Device efficiency remained consistent after bending and during repeated bending cycles.
- Microstructural analysis confirmed the integrity of the PMMA/UGS/PMMA films.
Conclusions:
- The UGS-based flexible BOM devices demonstrate excellent mechanical robustness and stable memory performance.
- The integration of UGS within PMMA layers is a viable strategy for creating durable flexible memory.
- These findings suggest promising applications for UGS in next-generation flexible electronic systems.
