Triboelectrification-induced electroluminescent skin for real-time information recording at a record low pressure threshold of 0.125 kPa

The excitation of luminescent devices often requires complex structures with external power sources or intense mechanical stimuli. Herein, we report a novel triboelectrification-induced electroluminescent (TIEL) skin with a simple structure, which can much more efficiently convert weak mechanical aggitation into electrical and optical energy. The flexible TIEL skin utilizes a high smooth matrix PVP, and Pb(Zr_xTi_1-xO₃) that enhances the dielectric property and the polarization of the skin, largely improving the triboelectric properties and luminescence intensity of the skin, respectively. The pressure threshold of TIEL skin breaks the record and reaches up to 0.125 kPa, which is ten-fold lower than the lowest pressure threshold of ZnS-based optic devices reported so far. It can not only trigger large-area luminescence, but also capture the dynamic motion of pen-tip like objects. Furthermore, TIEL skin successfully achieves remote real-time transmission and analysis of visualized information, which can precisely collect the optical information of handwriting and local single-point tracking, as well as obtain individual writing habits. This study shows a highly efficient way of self-powered visualized sensing, electronic signature, and anti-counterfeit information.