High performance single-crystal field-effect transistors based on twisted polyaromatic semiconductor...

Area of Science:

• Organic electronics
• Materials science
• Solid-state physics

Background:

• Development of novel organic semiconductors is crucial for advanced electronic devices.
• Pyrene and coronene derivatives offer unique π-conjugated systems for charge transport.

Purpose of the Study:

• To synthesize and characterize a new p-channel semiconductor based on a pyreno[4,5-a]coronene framework.
• To investigate the solid-state packing and charge transport properties of the novel molecule.

Main Methods:

• Chemical synthesis of pyreno[4,5-a]coronene.
• Single-crystal X-ray diffraction for structural analysis.
• Fabrication and characterization of single-crystal field-effect transistors (SC-FETs).

Main Results:

• Successful synthesis and characterization of the novel p-channel semiconductor.
• The molecule exhibits a twisted π-conjugated framework with efficient cofacial π-π stacking (3.808 Å centroid-to-centroid distance).
• SC-FETs demonstrated high charge carrier mobility (~0.89 cm² V⁻¹ s⁻¹) and an on/off ratio (~6 × 10⁴).

Conclusions:

• The novel pyreno[4,5-a]coronene is a promising p-channel organic semiconductor.
• Its unique molecular structure and solid-state packing facilitate high charge transport performance.
• This work contributes to the design of high-performance organic electronic materials.