Solution-Processed Thin Film of a Novel Organic Charge-Transfer Complex for Near-Infrared Detection in Field-Effect...

Area of Science:

• Materials Science
• Organic Electronics
• Nanotechnology

Background:

• Charge-transfer complexes (CTCs) offer tunable electronic properties via donor-acceptor interactions.
• Current fabrication methods for CTCs (e.g., drop-casting, coevaporation, cosublimation) limit practical device integration.
• Organic field-effect transistors (OFETs) are crucial for flexible electronics and sensors.

Purpose of the Study:

• To synthesize novel CTC cocrystals suitable for thin-film device fabrication.
• To develop and demonstrate a scalable, solution-based processing technique for CTC thin films.
• To evaluate the performance of CTC-based OFETs for infrared (IR) detection.

Main Methods:

• Synthesis of (Ph-BTBT-C10)(F4TCNQ) cocrystals with a charge transfer degree (ρ) of 0.19.
• Deposition of CTC thin films using a rapid, scalable solution-shearing technique.
• Fabrication and characterization of organic field-effect transistors (OFETs) utilizing the CTC thin films.

Main Results:

• Achieved thin films of (Ph-BTBT-C10)(F4TCNQ) cocrystals via solution shearing.
• The resulting CTC thin films exhibited n-type semiconducting behavior.
• Demonstrated a pronounced response to infrared light at 1050 nm.

Conclusions:

• Solution-shearing enables scalable, low-cost fabrication of CTC thin films for OFETs.
• CTC-based OFETs show potential for advanced infrared detection and sensing applications.
• This work advances the integration of CTCs into practical electronic devices.