Self‐Powered Light‐Emitting Electronic Skin for Decoupled Mechanical Sensing and Continuous Human Movement Tracking

ABSTRACT Electronic skins are pivotal for advancing intelligent robotics and personalized health monitoring, yet they face persistent challenges in reliably distinguishing complex mechanical stimuli due to signal crosstalk. Furthermore, issues of durability and the need for external power supplies limit their practical application. Here, we report a self‐powered, dual‐mode electronic skin that integrates triboelectric (electrical) and mechanoluminescent (optical) sensing modalities. The device features a self‐healing and highly conductive MXene‐PVA hydrogel as a robust, flexible electrode. This design enables effective stimulus decoupling: normal pressure predominantly activates the triboelectric nanogenerator mode, generating a high open‐circuit voltage, while in‐plane strain (bending/stretching) triggers the mechano‐luminescence mode, producing a distinct optical signal. The MXene‐PVA hydrogel electrode endows the device with excellent mechanical resilience, including rapid self‐healing capabilities and stable conductivity under deformation. This work provides a new paradigm for creating highly durable, self‐powered e‐skins with sophisticated sensory capabilities, holding significant promise for applications in soft robotics, advanced human‐computer interaction, and wearable electronics.