Ultraflexible Organic Active Matrix Sensor Sheet for Tactile and Biosignal Monitoring

Flexible sensors are currently the subject of intensive research, as they allow cost-effective and environmentally friendly production large-area, flexible, when fabricated on ultrathin substrates, highly conformable devices. Among many intriguing applications, tactile biosignal monitoring, where lightweight with high wearing comfort particularly interesting, is focused here. The required spatiotemporal resolution signals achieved by integrating in an active matrix configuration. Organic ferroelectric transducers uniformity, characterized, for example, a sensitivity spread only 1.5%, combined similarly uniform ultralow noise level organic thin film transistors operating below 5 V, showing, threshold voltage variation just 0.13 12 × sensor array. transition frequency up to 160 kHz (saturation range) 17 (linear allows ≈3 mm at frame rate 1400 fps. thickness 2.8 µm renders sheet ultraflexible therefore virtually imperceptible human skin. Real-time monitoring modes subset 8 3 pixels pulse wave including heart blood pressure using four demonstrated.