Endogenously Triboenhanced Heterogeneous Piezoelectric Nanofiber Membranes for Self-Powered Electroluminescent Pressure Sensing

This is the authors' abstract. We don't add key points for this paper.

The innovation of sensing systems is increasingly evolving toward direct visualization, which demands real-time and high electromechanical output to drive reliable optical readout, yet most multimodal sensing systems rely on simple signal superposition. Here, an endogenous tribo-enhanced piezoelectric pressure sensing with visualization capability was developed by coupling a PAN/PVDF-HFP heterogeneous nanofiber membrane with a ZnS:Cu/PZT/Ecoflex electroluminescent layer. The nanofiber membrane features a skeleton-filling architecture in which PAN-rich and PVDF-HFP-rich domains create abundant heterogeneous interfaces for endogenous triboelectric charge generation. Incorporation of [BMIM][BF4] further promotes charge separation and transport, increasing the open-circuit voltage and short-circuit current to 8 V and 22.8 nA, respectively. The enhanced electromechanical output directly drives the electroluminescent layer, enabling the real-time visualization of handwriting, patterned indentation, and dynamic stretching. This work provides an interface engineering strategy for self-powered visual pressure sensing.