Abstract：
Near-infrared (NIR) phosphors have emerged as novel luminescent materials across various fields due to their unique advantages of high penetration and invisibility. However, there is currently a lack of intelligent NIR phosphors that can achieve multimode stimuli responsive for sensing applications. In this study, we employed a high-temperature solid-phase reaction to incorporate Pr3+ into Cr3+-doped gallate magnetite SrGa12O19 phosphor, yielding a multimode luminescent intelligent NIR phosphor. Also, due to the inherent cation vacancies and defects in the matrix, the material not only exhibits brighter photoluminescence but also exhibits distinct NIR mechanoluminescence at a lower load. Notably, Pr3+-doped SrGa12O19:Cr3+ also demonstrates extended persistent luminescence and thermoluminescence effects. Finally, we combined the phosphor with the blue LED chip to develop a new multifunctional NIR pc-LED. Leveraging NIR\'s unique penetrating ability, it can persist in biological tissues for prolonged periods, enabling optical inspection and offering a novel approach to password protection for anticounterfeiting measures. This intelligent NIR phosphor solution significantly expands the application potential of NIR light in food quality assessment and analysis.
摘要：
近红外(NIR)磷光体由于其具有高穿透性和不可见性的独特优势,已经成为各种领域的新型发光材料。然而,目前缺乏能够实现对感测应用的多模刺激响应的智能NIR磷光体。在这项研究中,我们采用高温固相反应将Pr3掺入Cr3掺杂的没食子酸磁铁矿SrGa12O19荧光粉中，产生多模发光智能近红外荧光粉。此外，由于基体中固有的阳离子空位和缺陷，该材料不仅表现出更亮的光致发光,而且在较低负载下表现出明显的NIR机械发光。值得注意的是,Pr3+掺杂的SrGa12O19:Cr3+也表现出延长的持续发光和热释光效应。最后,我们将荧光粉与蓝光LED芯片相结合，开发出一种新型多功能NIRpc-LED。利用NIR独特的穿透能力，它可以在生物组织中长时间存在，使光学检查和提供一种新的方法，以密码保护的防伪措施。这种智能NIR荧光粉解决方案极大地扩展了NIR光在食品质量评估和分析中的应用潜力。
