n-Type Semiconducting Polymer Fibers.

Area of Science:

• Materials Science
• Organic Electronics
• Polymer Chemistry

Background:

• Organic semiconductors are crucial for flexible electronic devices.
• Achieving high charge carrier mobility in organic materials remains a challenge.
• Fibrous morphologies offer unique advantages for charge transport.

Purpose of the Study:

• To fabricate defect-free bicomponent polymer fibers for organic electronics.
• To investigate the effect of electrospinning on polymer chain orientation and charge transport.
• To achieve high electron mobility in single fiber transistors.

Main Methods:

• Fabrication of poly{[N,N'-bis(2-octyl-dodecyl)-naphthalene-1,4,5,8-bis(dicarboximide)-2,6-diyl]-alt-5,5'-(2,2'-bithiophene)}/poly(ethyleneoxide) (P(NDI2OD-T2)/PEO) bicomponent fibers via electrospinning.
• Selective solvent rinsing to isolate pure P(NDI2OD-T2) fibers.
• Fabrication and characterization of single fiber transistors.

Main Results:

• Defect-free P(NDI2OD-T2)/PEO bicomponent fibers were successfully fabricated.
• Electrospinning induced preferential orientation of polymer chains along the fiber axis.
• Single fiber transistors exhibited electron mobility comparable to state-of-the-art thin-film devices.
• Device performance was independent of dielectric surface treatment.

Conclusions:

• Electrospinning is an effective method for producing high-performance organic semiconductor fibers.
• Preferential chain orientation in fibers significantly enhances electron mobility.
• These results demonstrate the potential of P(NDI2OD-T2) fibers for flexible and high-performance organic electronic applications.