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Sustainable and Scalable Polymer Field-Effect Transistors via Aqueous Emulsification and Pressure-Assisted Thermal
Taehoon Hwang1,2, Yumin Kim1,2, Dashdendev Tsogbayar1,2
1Department of Materials Science and Chemical Engineering, Hanyang University, Ansan 15588, Republic of Korea.
ACS Applied Materials & Interfaces
|November 4, 2025
Summary
This study introduces a sustainable method for creating high-performance organic field-effect transistors (OFETs) using water-based processing. This environmentally friendly approach avoids toxic solvents and achieves excellent device performance.
Area of Science:
- Materials Science
- Organic Electronics
- Sustainable Chemistry
Background:
- Organic field-effect transistors (OFETs) offer potential for flexible electronics but are limited by toxic solvent use in manufacturing.
- Current solution-processing methods for organic electronics rely heavily on hazardous organic solvents, hindering sustainable and scalable production.
Purpose of the Study:
- To develop an environmentally benign and scalable method for fabricating high-performance OFETs.
- To eliminate the need for toxic organic solvents in the solution processing of organic electronics.
Main Methods:
- Utilized aqueous emulsification with a nonionic surfactant to create stable dispersions.
- Employed pressure-assisted thermal (PAT) annealing to remove surfactant and improve film morphology.
- Integrated heat and pressure to promote polymer chain rearrangement and interparticle fusion.
Main Results:
- Achieved high-performance OFETs with a field-effect mobility up to 0.34 cm²·V⁻¹·s⁻¹, comparable to solvent-processed devices.
- Enhanced morphological uniformity, crystallinity, and charge transport in the semiconducting layers.
- Demonstrated successful fabrication without additional purification steps due to in-situ surfactant removal during PAT annealing.
Conclusions:
- Surfactant-assisted aqueous processing is a viable and sustainable pathway for advancing solution-processed polymer electronics.
- The developed method offers a scalable and environmentally friendly alternative to traditional solvent-based processing for OFET fabrication.
