Electronic skins are artificial skin-type multifunctional sensors, which hold great potentials in intelligent robotics, limb prostheses and human health monitoring. However, it is a great challenge to independently and accurately read various physical signals without power supplies. Here, a self-powered flexible temperature-pressure bimodal sensor based on high-performance thermoelectric films and porous microconed conductive elastic materials is presented. Through introducing flexible heat-sink design and harvesting body heat energy, the thin-film thermoelectric device could not only precisely sense temperature signal but also drive the pressure sensor for detecting external tactile stimulus. The integration of Bi-Te based thermoelectric film with high stability in wide temperature range enables the sensor to sense the ambient temperature with high resolution (<0.1 K) as well as excellent sensitivity (3.77 mV K-1). Meanwhile, the porous microconed elastomer responds to pressure variation with low-pressure detection (16 Pa) and a high sensitivity of 37 kPa-1. Furthermore, the bimodal sensor could accurately and simultaneously monitor human wrist pulse and body temperature in real time, which demonstrates promising applications in self-powered electronic skins for human health monitoring systems.

电子皮肤是人造皮肤型多功能传感器，在智能机器人、假肢和人体健康监测等方面具有巨大潜力。然而，在没有电源的情况下独立准确地读取各种物理信号是一个很大的挑战。在这里，提出了一种基于高性能热电膜和多孔微锥形导电弹性材料的自供电柔性温度-压力双峰传感器。通过引入灵活的散热器设计和收集身体热能，薄膜热电器件不仅可以精确感知温度信号，还可以驱动压力传感器检测外部触觉刺激。集成在宽温度范围内具有高稳定性的Bi-Te基热电膜使传感器能够以高分辨率（<0.1 K）和出色的灵敏度（3.77 mV K-1）感测环境温度。同时，多孔微锥形弹性体通过低压检测 (16 Pa) 和 37 kPa-1 的高灵敏度响应压力变化。此外，双峰传感器可以准确、同步地实时监测人体手腕脉搏和体温，这表明在人体健康监测系统的自供电电子皮肤中具有广阔的应用前景。