Stretchable, enhancement-mode PEDOT:PSS organic electrochemical transistors

The rise of wearable and implantable bioelectronics necessitates stretchable electronic devices and systems to seamlessly integrate with soft biological environments. Stretchable organic electrochemical transistors (OECTs), based on conducting polymer poly(3,4-ethylenedioxythiophene) doped with polystyrene sulfonate (PEDOT:PSS), have emerged as a promising candidate because of their combined high stability and high transconductance. However, a stretchable, enhancement-mode PEDOT:PSS OECT (SE-OECT) is still missing, limiting the development of complementary and low-power integration systems. In this Letter, we report SE-OECTs. The devices showed typical enhancement-mode transistor behaviors with standby power as low as 0.1 μW while maintaining stable performance after 1000 cyclic tests within 50% strain.