Flexible Fabric Temperature Sensor Based on Vo₂/Pedot:Pss with High Performance

Long-term effective temperature monitoring using a flexible wearable temperature sensor is critical for future health monitoring, noninvasive clinical biomonitoring, disease diagnosis, and so on. Thermistors have the merits of simple structure, ease of preparation and great sensitivity, but the preparation of thermistors with good flexibility is often at the expense of their sensitivity and requirement of high temperature. Herein, a flexible temperature sensor with stability and high sensitivity by spraying VO₂/PEDOT:PSS composites on an SBS electrospinning substrate is reported. The sensor exhibits high thermal sensitivity (−2.712%/°C), high precision (85 mK), ultra-fast response time (1 s) and recovery time (2.5 s), enabling accurate real-time temperature detection and meeting the need for long-term temperature monitoring and tracking. As a proof of concept, this sensor is applied to monitor human skin temperature, breathing rate, and temperature recognition, and as a temperature-based input keyboard, demonstrating its tremendous potential to further develop personalized flexible sensors.