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Trap-regulated highly efficient mechanoluminescence and persistent mechanoluminescence of Ca2MgSi2O7:Eu2+
Journal of Materials Chemistry C ( IF 5.7 ) Pub Date : 2023-07-28 , DOI: 10.1039/d3tc02030d Yingjuan Yan 1, 2, 3 , Shaofan Fang 2 , Yanyan Li 1 , Yixuan Xu 1 , Yingdan Song 1 , Zhidong Ma 3 , Yaru Shi 1 , Lei Zhao 1 , Zhaofeng Wang 2, 3
Journal of Materials Chemistry C ( IF 5.7 ) Pub Date : 2023-07-28 , DOI: 10.1039/d3tc02030d Yingjuan Yan 1, 2, 3 , Shaofan Fang 2 , Yanyan Li 1 , Yixuan Xu 1 , Yingdan Song 1 , Zhidong Ma 3 , Yaru Shi 1 , Lei Zhao 1 , Zhaofeng Wang 2, 3
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Mechanoluminescent materials have shown promising applications in visualized mechanical sensing, imaging, and real-time monitoring because of unique mechanics-optics conversion. However, most mechanoluminescent materials exhibit weak intensity and transient emitting behavior, which severely hinders practical applications. In this work, trap-controlled mechanoluminescence (ML) under friction or compression was demonstrated in Ca2MgSi2O7:Eu2+ when composited with epoxy resin. In addition to green-emitting ML with relatively good cyclic stability, Ca2MgSi2O7:Eu2+ exhibited attractive persistent mechanoluminescence (Pers-ML) behavior (i.e., the sample could emit light continuously after removing the applied mechanical stimulus). This is a significant finding to break the restrictions caused by conventional transient ML behavior. By investigating the intrinsic structure, matrix effects and trap evolution, the “deep” traps and “shallow” traps were found to be responsible for the as-observed ML and Pers-ML, respectively. Based on the physical understanding stated above, a trap-regulating strategy by co-doping with Ho3+ was developed, which simultaneously enhanced ML and Pers-ML. These developed materials with highly efficient ML and Pers-ML could be promising for mechanics-driven lighting, displaying, imaging, and sensing applications in various fields.
中文翻译：
Ca2MgSi2O7:Eu2+ 陷阱调节的高效机械发光和持久机械发光
机械发光材料由于独特的力学-光学转换，在可视化机械传感、成像和实时监测方面显示出广阔的应用前景。然而，大多数机械发光材料表现出弱强度和瞬态发光行为，严重阻碍了实际应用。在这项工作中，当Ca 2 MgSi 2 O 7 :Eu 2+与环氧树脂复合时，在摩擦或压缩下证明了陷阱控制的机械发光（ML） 。除了具有相对良好的循环稳定性的绿光发射ML之外，Ca 2 MgSi 2 O 7 :Eu 2+还表现出有吸引力的持久机械发光（Pers-ML）行为（即，样品在去除施加的机械刺激后可以连续发光）。这是一个重大发现，打破了传统瞬态机器学习行为造成的限制。通过研究内在结构、基体效应和陷阱演化，发现“深”陷阱和“浅”陷阱分别是观察到的 ML 和 Pers-ML 的原因。基于上述物理理解，开发了一种与Ho 3+共掺杂的陷阱调节策略，该策略同时增强了ML和Pers-ML。这些开发的材料具有高效的 ML 和 Pers-ML，有望用于各个领域的机械驱动照明、显示、成像和传感应用。
更新日期：2023-07-28
中文翻译：
Ca2MgSi2O7:Eu2+ 陷阱调节的高效机械发光和持久机械发光
机械发光材料由于独特的力学-光学转换，在可视化机械传感、成像和实时监测方面显示出广阔的应用前景。然而，大多数机械发光材料表现出弱强度和瞬态发光行为，严重阻碍了实际应用。在这项工作中，当Ca 2 MgSi 2 O 7 :Eu 2+与环氧树脂复合时，在摩擦或压缩下证明了陷阱控制的机械发光（ML） 。除了具有相对良好的循环稳定性的绿光发射ML之外，Ca 2 MgSi 2 O 7 :Eu 2+还表现出有吸引力的持久机械发光（Pers-ML）行为（即，样品在去除施加的机械刺激后可以连续发光）。这是一个重大发现，打破了传统瞬态机器学习行为造成的限制。通过研究内在结构、基体效应和陷阱演化，发现“深”陷阱和“浅”陷阱分别是观察到的 ML 和 Pers-ML 的原因。基于上述物理理解，开发了一种与Ho 3+共掺杂的陷阱调节策略，该策略同时增强了ML和Pers-ML。这些开发的材料具有高效的 ML 和 Pers-ML，有望用于各个领域的机械驱动照明、显示、成像和传感应用。
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