The Polymer Society of Korea

박민규 (부산대학교)

심현석 (부산대학교)

Soft electronics are important for wearable, soft robotic, and implantable devices, but elastomer blending can interrupt charge transport and limit ionic access. Here, a backbone-anchored crosslinking additive (DBr-PDMS) is introduced to improve robustness without elastomer dilution. OM/AFM imaging and solvent flushing confirm crack suppression and formation of an insoluble network, while in situ GIWAXS supports stabilized molecular coherence under strain. Ion-gel-gated transistors with crosslinked PTB7-Th retain electrochemical coupling and transistor performance close to pristine devices and operate stably up to 100% strain, whereas SEBS-blended controls show clear penalties. A 5×5 transistor array shows uniform characteristics. Finally, a stretchable circuit-based sensor links deformation to output current for real-time Bluetooth status reporting and solenoid actuation, demonstrating a system-level proof of concept.