(076006)Experimental and Computational Study of Elasticoluminescence in Gd_2O_2S:Tb~(3+) : Implications for Mechanoluminescence Origins

摘要

Mechanoluminescent materials can convert mechanical stress into light. Among these, elasticoluminescent materials are useful for monitoring periodic and repetitive events. However, the development of high-performance elasticoluminescent materials remains a signi?cant challenge because of the lack of understanding of the structures and mechanisms underlying mechanoluminescent materials. To address this issue, this study investigated the elasticoluminescence properties of Gd_2O_2S:Tb~(3+) through a comprehensive analysis using experimental and computational techniques. Using thermoluminescence spectroscopy and density functional theory, we observed that trap states within the bandgap are generated by the O~(2-) and S~(2-) anion vacancies, which contribute to mechanoluminescence. The observation of green mechanoluminescence (ML) characteristics in Gd_2O_2S:Tb~(3+) was accompanied by a meticulous analysis of their origins, which aligned signi?cantly well with the computational results. These ?ndings enhance our understanding of the origin of ML and provide a solid foundation for the development of next-generation high-performance ML materials, thus fostering advancements in various ?elds of advanced technology research.