Li Hua-Hui, Wang Ya-Kun, Liao Liang-Sheng
Macao Institute of Materials Science and Engineering, Macau University of Science and Technology, Macau SAR, Taipa, 999078, China.
Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, Suzhou, 215123, China.
Adv Mater. 2024 Jul;36(30):e2403076. doi: 10.1002/adma.202403076. Epub 2024 May 19.
The spotlight has shifted to near-infrared (NIR) luminescent materials emitting beyond 1000 nm, with growing interest due to their unique characteristics. The ability of NIR-II emission (1000-1700 nm) to penetrate deeply and transmit independently positions these NIR luminescent materials for applications in optical-communication devices, bioimaging, and photodetectors. The combination of rare earth metals/transition metals with a variety of matrix materials provides a new platform for creating new chemical and physical properties for materials science and device applications. In this review, the recent advancements in NIR emission activated by rare earth and transition metal ions are summarized and their role in applications spanning bioimaging, sensing, and optoelectronics is illustrated. It started with various synthesis techniques and explored how rare earths/transition metals can be skillfully incorporated into various matrixes, thereby endowing them with unique characteristics. The discussion to strategies of enhancing excitation absorption and emission efficiency, spotlighting innovations like dye sensitization and surface plasmon resonance effects is then extended. Subsequently, a significant focus is placed on functionalization strategies and their applications. Finally, a comprehensive analysis of the challenges and proposed strategies for rare earth/transition metal ion-doped near-infrared luminescent materials, summarizing the insights of each section is provided.
人们的目光已转向发射波长超过1000 nm的近红外（NIR）发光材料，因其独特特性而受到越来越多的关注。近红外二区发射（1000 - 1700 nm）具有深层穿透和独立传输的能力，使得这些近红外发光材料可应用于光通信设备、生物成像和光电探测器。稀土金属/过渡金属与各种基质材料的结合为材料科学和器件应用创造新的化学和物理性质提供了一个新平台。在这篇综述中，总结了稀土和过渡金属离子激活的近红外发射的最新进展，并阐述了它们在生物成像、传感和光电子等应用中的作用。文章首先介绍了各种合成技术，并探讨了如何将稀土/过渡金属巧妙地掺入各种基质中，从而赋予它们独特的特性。随后讨论了提高激发吸收和发射效率的策略，重点介绍了染料敏化和表面等离子体共振效应等创新方法。接着，重点关注了功能化策略及其应用。最后，对稀土/过渡金属离子掺杂的近红外发光材料面临的挑战和提出的策略进行了全面分析，并总结了各部分的见解。
