High performance organic nonvolatile flash memory transistors with high-resolution reduced graphene oxide patterns as...

Area of Science:

• Materials Science
• Organic Electronics
• Nanotechnology

Background:

• Organic nonvolatile memory transistors (ONVMTs) are crucial for next-generation electronics.
• Existing ONVMTs face challenges with data retention and stability.
• Reduced graphene oxide (rGO) shows promise as a charge-trapping material.

Purpose of the Study:

• To develop high-performance ONVMTs with improved nonvolatile memory characteristics.
• To investigate the impact of reduced graphene oxide (rGO) patterning on memory performance.
• To optimize the structure of ONVMTs for enhanced data retention.

Main Methods:

• Fabrication of ONVMTs using a conductive polymer semiconductor, a hydroxyl-free polymer dielectric, and patterned rGO floating gates.
• Integration of finely patterned rGO (20-120 μm line width) between SiO2 and the polymer dielectric.
• Characterization of memory behavior, transfer characteristics, and retention times under varying rGO line widths.

Main Results:

• The fabricated ONVMTs exhibited ideal memory behavior with prompt response to gate bias.
• Memory retention time increased significantly with reduced rGO line width.
• A 20-μm-wide rGO pattern enabled a large memory window (>20 V) retained for over 5 × 10^5 seconds.

Conclusions:

• Patterning of rGO is a critical factor for suppressing charge release and enhancing memory retention in ONVMTs.
• The developed ONVMTs demonstrate superior performance and long-term stability.
• This approach offers a promising pathway for high-performance organic memory devices.