Mechanoluminescent ML) materials, with the advantages of stress visualization and real-time dynamic response, has great application prospects in stress sensing, display, and non-destructive stress detection. In this work, the Cr-doped MgGaO phosphor was proposed and investigated systematically. It emits near-infrared ML by compounding without pre-irradiation, and the intensity of ML can be significantly enhanced through UV irradiation. In addition, the crystal field of Cr ions was tuned through the introduction of Al ions. More importantly, the introduction of Al ions changed the trap distribution of the materials, which greatly enhanced the strength of ML. Finally, based on the small interference of NIR by visible light and excellent penetration, the ML signal was successfully monitored in a bright environment by combining with polydimethylsiloxane (PDMS), and it could penetrate about 5 mm of skin tissue, which exhibits certain applications prospects for stress monitoring in a bright environment and stress monitoring in the human body.

中文翻译：

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Al3+ 调节的 MgGa2O4: Cr3+ 产生强近红外机械发光


力致发光ML)材料具有应力可视化和实时动态响应的优点，在应力传感、显示和无损应力检测方面具有巨大的应用前景。在这项工作中，提出并系统地研究了Cr掺杂MgGaO荧光粉。它无需预先照射即可通过复合来发射近红外ML，并且通过UV照射可以显着增强ML的强度。此外，通过引入Al离子来调节Cr离子的晶体场。更重要的是，Al离子的引入改变了材料的陷阱分布，大大增强了ML的强度。最后，基于近红外可见光干扰小、穿透力好，与聚二甲基硅氧烷（PDMS）结合，成功在明亮环境下监测ML信号，可穿透约5 mm的皮肤组织，表现出一定的应用前景用于明亮环境下的压力监测和人体压力监测。