Broadly applicable hydrophilic additive enhances electrochemical transistor function

作者：Lin Gao, Yongjoon Cho, Rui Wang, Yao Yao, Dayong, Yifan Wang, Yongfa Cheng, Yuyang Wang, Qing Ma, Isaiah Duplessis, S. H. Chung, Evan Wilson, Kilwon Cho, Binghao Wang, Lu Li, Jonathan Rivnay, Hong Wang, Junsheng Yu, Tobin J. Marks, Antonio Facchetti · 发表于：Proceedings of the National Academy of Sciences · 年份：2026 · DOI：10.1073/pnas.2523877123 · 被引用次数：7 · 研究领域：Conducting polymers and applications、Advanced Memory and Neural Computing、Advanced Sensor and Energy Harvesting Materials

Organic semiconductors offering efficient mixed ionic-electronic charge transport are key components of organic electrochemical transistors (OECTs) needed for future bioelectronics and other technologies. However, hydrophobic semiconductors typically have limited ion mobility and are unstable in aqueous environments, restricting OECT applications. To address these issues, we report a broadly applicable strategy for high-performance OECTs by blending polymeric semiconductors with a photocrosslinkable hydrophilic ion-conducting supplement, poly(ethyleneglycol)-dimethylacrylate (PEGDMA). The result is ordered, interconnected semiconductor domains within an amorphous ion-conducting matrix, enabling rapid and reversible doping/dedoping without compromising charge transport. This approach enhances OECT performance across diverse electrolytes, semiconductors, and device architectures. Furthermore, PEGDMA enables high-resolution photopatterning of both semiconductors (<0.4 μm) and electrolytes (<2 μm), affording high-stability OECTs sustaining >10,000 cycles. This approach also enables wafer-scale array fabrication of 2,548 OECTs on 2" wafer, and miniaturized inverter, NAND, and NOR circuits. Also demonstrated are integration of these OECTs with a photosensor, creating a vision sensing array (10 × 10 pixels) that mimics visual image processing similar to the brain's perception system.