基于量子剪裁技术的高效率近红外应力发光材料的开发和机理研究

应力发光是将机械能转化为光能的一种效应。其中弹性应力发光能够成功实现非破坏性应力可视化检测，所以在人工智能，灾害检测等领域展现出广阔的应用前景。然而，目前已开发的弹性应力发光材料的发光波长范围主要集中在紫外和可见光波段，如果能够实现近红外波段（650-1800 nm）发射的应力发光，这种应力发光材料对于明亮环境下的高精度应力传感，生物体内的深层显像，以及对人造骨骼等人体辅助装置的无创应力分析等都能起到很好的促进和推动作用。本课题拟引进量子剪裁技术调控应力发光至近红外发光波段，并利用其量子劈裂特性解决近红外波段应力发光材料开发及应力发光效率提升的问题。同时，本课题拟利用缺陷分析技术，荧光衰减曲线测试，时间分辨光谱测试以及理论计算等分析手段对近红外应力发光与量子剪裁过程中的电子跃迁、缺陷俘获，能量传递、能级劈裂等发光动力学进行深入研究，并最终建立完整的近红外应力发光模型。

Mechanoluminescence (ML) is luminescence that is induced by mechanical stimuli. The most important form of ML, elasticoluminescence, has attracted considerable attention because it is a promising candidate for applications such as artificial intelligence, damage diagnosis and information storage, etc. However, the developed ML materials are limited by the emission bands between 380-650 nm from ultraviolet to visible light, and the near-infrared (NIR) ML materials are relatively lacking. The goal of this proposal is to introduce quantum tailoring technology to regulate ML to NIR range, and use its quantum splitting characteristics to achieve the development of NIR-ML materials and improvement of ML efficiency. We also intend to use the defect analysis technology, fluorescence decay curve test, time-resolved spectroscopy test and theoretical calculation to study the dynamic processes of electronic transition, defects, energy transfer, energy splitting, cross-relaxation and recombination, and finally establish the physical model of NIR-ML.