Solution-processed, high-performance n-channel organic microwire transistors.

Area of Science:

• Materials Science
• Organic Electronics
• Nanotechnology

Background:

• High-performance n-channel organic semiconductors are essential for low-cost, all-organic complementary circuits.
• Single-crystalline organic semiconductor nano/microwires (NWs/MWs) show promise for solution-processed transistors but lack integration methods.

Purpose of the Study:

• To develop a solution-processing approach for high-performance, air-stable n-channel organic transistors.
• To enable controlled alignment and density of semiconducting microwires for functional networks.

Main Methods:

• Solution synthesis of high-mobility single-crystalline organic semiconducting microwires (MWs).
• Filtration-and-transfer (FAT) alignment method for controlled MW integration.
• Fabrication of air-stable n-channel organic transistors using aligned MW networks.

Main Results:

• Achieved field-effect mobility up to 0.24 cm²/Vs for MW networks.
• Individual MWs exhibited mobility as high as 1.4 cm²/Vs.
• The FAT method demonstrated facile control over MW alignment and density.

Conclusions:

• The developed solution-processing approach enables high-performance organic transistors.
• The FAT method offers a route for directed assembly of organic and inorganic NWs/MWs.
• This work advances the potential for low-cost, all-organic electronics.