In Situ Electropolymerized Ambipolar Copolymers for Vertical OECTs

Area of Science:

• Materials Science
• Electrochemistry
• Polymer Chemistry

Background:

• Organic electrochemical transistors (OECTs) are crucial for electronic applications.
• Developing ambipolar electroactive polymers is key for advanced OECTs.
• Chemical polymerization can lead to contamination issues in polymer synthesis.

Purpose of the Study:

• To report a novel in situ electropolymerization method for synthesizing ambipolar electroactive polymers.
• To investigate the properties and performance of novel donor-acceptor polymers for vOECT applications.
• To demonstrate the efficiency and practicality of electropolymerization over chemical methods.

Main Methods:

• In situ electropolymerization of novel monomers (G-DTP-Bu-NDI and G-DTP-G-NDI) containing naphthalene diimide (NDI) and dithienopyrrole (DTP) units.
• Characterization of synthesized polymers using electrochemical and spectroelectrochemical techniques in organic and aqueous electrolytes.
• Fabrication and testing of vertical OECTs with in situ deposited polymer channels.

Main Results:

• Successful electrochemical polymerization yielding uniform, porous polymer films.
• Demonstrated stable ambipolar redox behavior in both aqueous and non-aqueous electrolytes.
• Fabricated vOECTs exhibiting promising transfer characteristics.

Conclusions:

• In situ electropolymerization is an efficient and clean method for producing ambipolar electroactive polymers.
• The synthesized donor-acceptor polymers show excellent electroactivity and are suitable for vOECT applications.
• These findings pave the way for a new generation of ambipolar electrochemical transistor devices.