Design and improve of the near-infrared phosphor by adjusting the energy levels or constructing new defects

Development of chromium-doped luminescent materials is pertinent to many emerging applications, ranging from agriculture, food industry to noninvasive health monitoring. The fundamental importance of chromium-activated luminescent materials in the field of optics and biomedicine makes the rapid development of novel materials and relevant applications. Herein, the recent advances on the luminescence principle and photoluminescence (PL) optimization for Cr 3+ -activated luminescent materials together with their potential applications are reviewed. The different types of most recently developed Cr 3+ -doped luminescent materials and the design principles are systematically summarized. The associations between crystal structure and nearinfrared (NIR) PL properties, as well as performance-evaluating parameters are introduced with the examples of known NIR emitting phosphors, which will be helpful to explore future NIR luminescent materials. Based on crystal field control, site engineering, and electron-phonon coupling, several efficient strategies for optimizing luminescence performances including bandwidth, thermal stability, and quantum efficiency of Cr 3+ -doped NIR luminescent materials are proposed. Then, potential applications in the fields of food analysis, night vision, information encryption, and optical sensors are surveyed. Finally, the challenges of promising Cr 3+ -doped luminescent materials are proposed.

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Recent Advances in Chromium‐Doped Near‐Infrared Luminescent Materials: Fundamentals, Optimization Strategies, and Applications

Dang

Wei

Liu

et al. 2022

Advanced Optical Materials

107

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Near‐Infrared Windows I and II Phosphors for Theranostic Applications: Spectroscopy, Bioimaging, and Light‐Emitting Diode Photobiomodulation

Huang

Rajendran

Chan

et al. 2022

Advanced Optical Materials

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The importance and practicality of near-infrared (NIR) light for the biomedical field has attached importance to the academe and industry with the development of technology. Luminescent materials with different doping strategies are promising candidates for covering near-infrared biological windows from 700 nm to 1 700 nm. The relationship between NIR light, nanophosphors, and biological tissue towards the function of diagnostic and therapy in different NIR windows is explored clearly, which corresponds to diffuse reflection spectroscopy with bioimaging and light-emitting diode (LED) photobiomodulation. The diseases can be monitored with specific chromophore absorption under the NIR light source, which also can be traced to the dynamic change of the biological environment by luminescent materials. Especially in brain diseases, cytochrome c oxidase in mitochondria as the crucial photoreceptor can be activated under NIR irradiation to achieve the non-invasive treatment of neuron protection and recovery. NIR light attributed to LED or nanophosphors show the potential of theranostic approaches in biomedical technology. Cr 3+ -and Ni 2+ -activated phosphors covering NIR windows I and II are presented with optical properties to explore the feasibility and practicability of non-invasive precise medical treatment in the future.

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Novel broadband near-infrared emitting long afterglow phosphor MgGeO3: Cr3+

Doke

Antuzevičš

Krieķe

et al. 2022

Journal of Alloys and Compounds

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Design and improve of the near-infrared phosphor by adjusting the energy levels or constructing new defects

Cited by 5 publications

References 21 publications

Recent Advances in Chromium‐Doped Near‐Infrared Luminescent Materials: Fundamentals, Optimization Strategies, and Applications

Recent Advances in Chromium‐Doped Near‐Infrared Luminescent Materials: Fundamentals, Optimization Strategies, and Applications

Near‐Infrared Windows I and II Phosphors for Theranostic Applications: Spectroscopy, Bioimaging, and Light‐Emitting Diode Photobiomodulation

Novel broadband near-infrared emitting long afterglow phosphor MgGeO3: Cr3+

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