Intrinsically Stretchable Subthreshold Organic Transistors for Highly Sensitive Low-Power Skin-Like Active-Matrix Temperature Sensors

Abstract

Stretchable wearable sensors ultimately require low power consumption and high response to physiological signals with skin conformability. However, power-response tradeoff and strain-dependent sensing instability remain key challenges for electronic skin (e-skin) sensors. Herein,an intrinsically stretchable organic subthreshold transistor operating at low voltage (−1 V) is presented, leading to ultralow power consumption (<1 nW) for highly sensitive skin-like temperature sensory devices. The highly temperature-dependent hopping transport of the fully stretchable subthreshold transistor exhibits high-temperature sensitivity (9.4% °C−1) and excellent sensing stability up to 100% strain. A skin-like subthreshold organic transistor active-matrix array is successfully fabricated that sensed the surface temperature distribution under a 3D deformation.