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首页> 外文期刊>Advanced Functional Materials >Highly Sensitive and Easily Recoverable Excitonic Piezochromic Fluorescent Materials for Haptic Sensors and Anti-Counterfeiting Applications
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Highly Sensitive and Easily Recoverable Excitonic Piezochromic Fluorescent Materials for Haptic Sensors and Anti-Counterfeiting Applications

机译：用于触觉传感器和防伪应用的高灵敏度和易于恢复的激子压电致变色荧光材料

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摘要

Piezochromic fluorescent (PCF) materials with distinct multicolor switching have attracted wide attention in many fields such as optoelectronic devices and deformation detection. However, few PCF materials with low-pressure stimuli and good recoverability have been reported. A highly sensitive and easily recoverable PCF molecular system that can switch between green (G) and orange (O) emissions upon an extremely low piezoresponsive (PR) of 0.5 MPa and heating at 120 degrees C is demonstrated. A mechanistic study combining X-ray diffraction analysis and the theoretical calculations reveal that a slight change in slipping-angle of pi-stacks induced by mechanical pressure amplifies the exciton couplings from G to O J-aggregates, leading to not only distinct PCF switching but also high emission efficiencies >0.5 owing to superradiance of J-aggregate excitons. Benefiting from low MPa PR, high emission efficiency, and good recoverability applications including haptic sensors and anti-counterfeiting application are demonstrated. This research introduces the effect of stimuli-responsive excitonic coupling as new design guidance for developing PCF materials with low-pressure stimuli, high emission efficiency, and good recoverability.
机译：具有明显的多色切换的压致变色荧光（PCF）材料在许多领域引起了广泛的关注，例如光电器件和变形检测。然而，很少有具有低压刺激和良好可恢复性的PCF材料被报道。展示了一种高度敏感且易于恢复的PCF分子系统，该系统可以在0.5 MPa的极低压电响应（PR）和120摄氏度加热下在绿色（G）和橙色（O）发射之间切换。结合X射线衍射分析和理论计算的机理研究表明，由机械压力引起的pi堆栈滑移角的轻微变化会放大从G到O J聚集体的激子耦合，不仅导致明显的PCF转换，而且导致由于J聚集激子的超辐射，其发射效率也高于0.5。展示了受益于低MPa PR，高排放效率和良好的可恢复性应用，包括触觉传感器和防伪应用。这项研究介绍了刺激反应性激子耦合的作用，作为开发具有低压刺激，高发射效率和良好可回收性的PCF材料的新设计指南。

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  • 来源
    《Advanced Functional Materials》 |2020年第17期|2000105.1-2000105.8|共8页
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  • 作者单位

    Capital Normal Univ Beijing Key Lab Opt Mat & Photon Devices Beijing 100048 Peoples R China;

    Tianjin Univ Inst Mol Plus Tianjin Collaborat Innovat Ctr Chem Sci & Engn Tianjin Key Lab Mol Optoelect Sci Tianjin 300072 Peoples R China;

    Duke Univ Dept Chem Durham NC 27708 USA;

    Capital Normal Univ Beijing Key Lab Opt Mat & Photon Devices Beijing 100048 Peoples R China|Tianjin Univ Inst Mol Plus Tianjin Collaborat Innovat Ctr Chem Sci & Engn Tianjin Key Lab Mol Optoelect Sci Tianjin 300072 Peoples R China;

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  • 正文语种 eng
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  • 关键词

    anti-counterfeiting; excitonic materials; fluorescent materials; haptic sensors; J-aggregates; piezoresponsive materials;

    机译：防伪激子材料;荧光材料;触觉传感器;J骨料;压电材料;

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