三价铬离子掺杂氟化物宽带近红外荧光粉研究进展

Research Progress on Cr3+-Doped Fluoride Broadband NIR Phosphors

摘要:

宽带近红外光源在夜视成像、无损检测、医疗成像和信息识别等领域中具有广泛应用场景。在众多近红外光源中，荧光粉转换的宽带近红外LED，（pc-LED）凭借其结构紧凑、成本低、效率高等优势逐渐崭露头角。作为宽带近红外pc-LED的关键组成，Cr³⁺离子掺杂的氟化物荧光粉表现出卓越的近红外发光性能、出色的热稳定性及低晶格声子能级等独特特性，因此近年来受到研究人员的广泛关注。从合成方法、材料设计和应用探索3个方面，综述了Cr³⁺掺杂氟化物荧光粉的最新研究进展。同时，提出了一些需要进一步研究的问题，以帮助读者深入了解该领域的研究现状和未来发展趋势。

Abstract:

Broadband near-infrared light sources find diverse applications in night vision，non-destructive detection，biological imaging，information recognition，and more. Capitalizing on its merits of compact structure，low cost，and high efficiency，phosphor-converted broadband near-infrared LED（pc-LED）are progressively emerging as frontrunners among myriad near-infrared light sources. Serving as the pivotal constituent of broadband near-infrared pc-LED，Cr³⁺-doped fluoride phosphor garnered substantial attention from researchers owing to its potent near-infrared luminescence performance，remarkable thermal stability and diminished phonon energy. This paper comprehensively surveys the recent advancements in Cr³⁺ doped fluoride phosphors ，encompassing synthesis method，material design and potential applications. Ultimately，various issues are posited for future investigation to help readers understand the research status and future development trends in this realm.