Mechanically Charged and Self-Recoverable Green-Emitting Long-Persistent Mechanoluminescence in Ca9NaMg(PO4)7:Tb3+

Mechanoluminescent (ML) materials have shown promising applications in visualized mechanical sensing, imaging, and real-time monitoring because of their unique mechanics-optics conversion. However, the short emission lifetime of transient ML presents challenges in overcoming temporal and spatial constraints in practical applications. In this work, a mechanically charged persistent ML material was created by compositing the Ca