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Updated: Aug 3, 2026
Ultrahigh Density Array of Vertically Aligned Small-molecular Organic Nanowires on Arbitrary Substrates
Published on: June 18, 2013
Solution-Processed Wide-Bandgap Organic Semiconductor Nanostructures Arrays for Nonvolatile Organic Field-Effect
Wen Li1, Fengning Guo1, Haifeng Ling1
1Key Laboratory for Organic Electronics and Information Displays and Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing University of Posts and Telecommunications, 9 Wenyuan Road, Nanjing, 210023, China.
This study reports on novel organic field-effect transistor (OFET) memory devices using ordered nanostructures of wide-bandgap organic semiconductors. These devices show significantly enhanced memory performance, including a larger memory window and faster switching speeds.
Area of Science:
- Organic electronics
- Materials science
- Nanotechnology
Background:
- Organic field-effect transistors (OFETs) are key components in flexible electronics.
- Developing high-performance nonvolatile memory devices is crucial for advanced electronic applications.
- Wide-bandgap (WBG) organic semiconductors offer unique electronic properties for device fabrication.
Purpose of the Study:
- To develop and characterize nonvolatile OFET memory devices utilizing ordered nanostructures (NSs) of a WBG small-molecule organic semiconductor.
- To investigate the impact of NS morphology on memory performance.
- To establish a solution-processing method for fabricating high-performance OFET memory devices.
Main Methods:
- Fabrication of WG3 nanostructures (NSs) via phase separation using spin-coating of WG3/trimethylolpropane (TMP) blend solutions.
- Integration of WG3 NSs as charge storage elements in OFET memory devices.
- Characterization of memory performance, including memory window, switching speed, retention capability, and switching properties.
Main Results:
- OFET memory devices based on WG3 NS arrays demonstrated significantly improved performance compared to devices with smooth WG3 films.
- Key performance enhancements include a larger memory window (≈45 V), faster switching speed (≈1 s), and stable retention (>10^4 s).
- Enhanced performance is attributed to improved charge trapping and charge-exciton annihilation efficiency due to increased contact area between WG3 NSs and the pentacene layer.
Conclusions:
- A versatile solution-processing approach enables the fabrication of high-performance nonvolatile OFET memory devices using ordered WBG organic semiconductor NS arrays.
- The developed WG3 NS-based OFET memory devices exhibit superior characteristics suitable for advanced electronic applications.
- This approach is potentially applicable to a broad range of WBG organic semiconductor materials for memory device development.
