High-performance air-stable organic field-effect transistors: isoindigo-based conjugated polymers

Area of Science:

• Materials Science
• Organic Electronics
• Polymer Chemistry

Background:

• Organic field-effect transistors (OFETs) are crucial for flexible electronics.
• Developing high-performance, solution-processable organic semiconductors is essential for advancing optoelectronic devices.
• Isoindigo-based conjugated polymers represent a potential class of materials for these applications.

Purpose of the Study:

• To synthesize and characterize two novel conjugated polymers, IIDDT and IIDT, featuring an isoindigo core.
• To investigate the field-effect performance of these polymers in organic field-effect transistors.
• To evaluate the potential of isoindigo-based polymers as solution-processable organic semiconductors.

Main Methods:

• Synthesis of isoindigo-based conjugated polymers (IIDDT and IIDT).
• Fabrication and characterization of organic field-effect transistors (OFETs) using these polymers.
• Measurement of charge carrier mobility and stability.

Main Results:

• Both IIDDT and IIDT polymers were successfully synthesized.
• IIDDT demonstrated high air-stable field-effect mobility, reaching up to 0.79 cm(2) V(-1) s(-1).
• This mobility value is competitive among existing polymer field-effect transistor materials.

Conclusions:

• Isoindigo-based conjugated polymers are promising candidates for high-performance organic electronics.
• The facile preparation and excellent mobility of IIDDT highlight its potential for solution-processable applications.
• These findings support the development of isoindigo polymers for advanced optoelectronic devices.