Defects in Inorganic Mechanoluminescent Phosphors: Insights and Impacts

Abstract Mechanoluminescence (ML), the light emission of materials in response to mechanical stimuli, has gained significant attention in various fields due to the in situ and real‐time “force to light” converting ability. Defects dominate the ML process, either for accommodating carriers or as sites for carrier recombination. However, comprehensive discussions on ML‐based defects are rarely reported. The review opens with an exploration of recent progress in ML research, highlighting the central role of defects in ML. A range of defect types commonly exist in ML materials are firstly introduced, which aims to highlight the profound influences on ML. Subsequently reported defect‐dominated phosphors are researched to elucidate the intricate relationship between specific defect types and their influence on ML performance, shedding light on the underlying luminescence mechanisms. Afterward, experimental techniques for defect characterization are also researched to demonstrate how defects work in ML. The role of computational modeling is confirmed to act as a powerful tool for investigating the atomistic mechanisms of defect‐related processes and enabling precise control of defects in ML materials. In conclusion, this mini‐review underscores the centrality of defects in ML materials, offering an integrated perspective on their profound influence and potential to guide future research endeavors.