Stretchable Optical–Electrical Dual‐Responsive Photonic Skin and Its Intelligent Sensing Applications

Triboelectrification‐induced electroluminescence (TIEL), as an emerging light‐emitting mechanism, integrates self‐powering capability and low‐stress activation capability. By comparison, while traditional mechanoluminescence (ML) requires a pressure threshold at the MPa level for activation, electroluminescence (EL) relies on complex external circuits. TIEL thus demonstrates significant potential in the fields of wearable devices and intelligent sensing. In this study, ZnS:Cu/PVDF/PDMS stretchable photonic composite films were engineered based on TIEL principles. Integrated with a single‐electrode triboelectric nanogenerator (TENG), the system achieves optical–electrical dual‐responsive characteristics with exceptional performance (1.56 μW cm −2 optical power density, 30.1 nC charge output), durability (>3000 cycles), and stress sensitivity (0.65 V kPa −1 ), the TIEL peak dynamic curve is distinguished from the noise region by an interval of 95 ms, and the response time is only 2 ms, enabling precise detection of weak mechanical stimuli and rapid dynamic changes. For practical validation, this photonic skin enables gesture recognition through synchronized optical–electrical signal mapping and high‐security handwriting authentication through dual‐modal cross‐verification. The high‐performance stretchable optical–electrical dual‐responsive photonic skin developed in this study not only retains the intuitiveness of optical detection but also incorporates the reliability of electrical sensing, providing an innovative solution that combines high precision with enhanced security for intelligent interaction.