Smart Surface Piezoelectric Sensor With High Optical Transmission

Piezoelectric sensors based on flexible polymer films and hybrid transparent electrodes offer advantages in mechanical adaptability and optical transparency, making them promising candidates for future applications in smart surfaces and multifunctional tactile systems. A piezoelectric sensor based on structured polyvinylidene fluoride (PVDF) film realized by means of ink deposition was developed. The multilayer sensor structure was based on a hybrid electrical conductor ink with silver nanowires (AgNW) and single‐walled carbon nanotubes (SWCNTs) and achieved an optical transmission of ∼70% in the visible range (VIS) and ∼79% in the near infrared range (NIR). Comprehensive transient tests confirmed an improved voltage response, high sensitivity, and low drift. Characterization of dynamic electrical properties indicated stable capacitive behavior over a wide frequency range. The new sensor concept shows considerable potential for future human–machine interfaces and multifunctional pressure‐sensitive surfaces.