Ultra-flexible, ultra-thin, ultra-sensitive organic pressure sensor system for biomedical applications

We demonstrated a large-area, ultra-flexible, ultra-thin, and ultra-sensitive pressure/touch sensor system comprising an organic transistor active matrix integrated with an array of flexible ferroelectric polymer (polyvinylidene difluoride; PVDF) cells on 12.5-μm-thick plastics. The extreme flexibility of the organic-transistor-based amplifiers can be bent to a radius of less than 50 μm. The geometrical structure of the PVDF films and amplifiers enables the sensor system to detect a pressure of ~1 kPa; the 1-mV signal generated by the PVDF can be amplified by a factor of 450 by the organic amplifiers, thus enabling ultra-sensitivity.