Laser-driven broadband near-infrared light source with watt-level output

Nature Photonics, Journal Year: 2024, Volume and Issue: 18(6), P. 562 - 568

Published: March 1, 2024

Language: Английский

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Near‐Infrared Luminescent Materials Incorporating Rare Earth/Transition Metal Ions: From Materials to Applications

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(30)

Published: May 11, 2024

Abstract The spotlight has shifted to near‐infrared (NIR) luminescent materials emitting beyond 1000 nm, with growing interest due their unique characteristics. ability of NIR‐II emission (1000–1700 nm) penetrate deeply and transmit independently positions these NIR for applications in optical‐communication devices, bioimaging, photodetectors. combination rare earth metals/transition metals a variety matrix provides new platform creating chemical physical properties science device applications. In this review, the recent advancements activated by transition metal ions are summarized role spanning sensing, optoelectronics is illustrated. It started various synthesis techniques explored how earths/transition can be skillfully incorporated into matrixes, thereby endowing them discussion strategies enhancing excitation absorption efficiency, spotlighting innovations like dye sensitization surface plasmon resonance effects then extended. Subsequently, significant focus placed on functionalization Finally, comprehensive analysis challenges proposed earth/transition ion‐doped materials, summarizing insights each section provided.

Language: Английский

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2, 1, 3‐Benzothiadiazole Derivative Small Molecule Fluorophores for NIR‐II Bioimaging

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(16)

Published: Jan. 4, 2024

Abstract Second near‐infrared (NIR‐II) bioimaging technology shows broad application prospects in the field of biomedical due to its significant superiority deep tissue penetration and high signal‐to‐background ratio. Among them, organic small molecule fluorophores have received progressively more consideration their low biotoxicity, biocompatibility, rapid clearance, good modification properties. As key acceptor core, 2, 1, 3‐benzothiadiazole (BTD) derivative plays an essential role construction donor‐acceptor‐donor type NIR‐II fluorophores. This mini‐review summarizes research development based on BTD derivatives bioimaging, focusing molecular design photophysical properties, introduces a part applications biological field. Furthermore, challenges BTD‐based future are discussed .

Language: Английский

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Tunable Spinel Structure Phosphors: Dynamic Change in Near‐Infrared Windows and Their Applications

Advanced Optical Materials, Journal Year: 2023, Volume and Issue: 11(23)

Published: July 26, 2023

Abstract Applications in near‐infrared (NIR) have been explored significantly many fields, including bioimaging, night vision, plant growth, and chemical analysis. Different emission profiles are required within the same industry. Developing luminescent materials with different tuning methods is reliable for controlling NIR regions (NIR‐I, 700–1000 nm; NIR‐II, 1000–1700 nm). Spinel phosphors promising candidates due to their ability modulate crystal field. Understanding parameters that influence degree of inversion spinel compounds crucial harness variability structure. Cr 3+ Ni 2+ ideal activators NIR‐I NIR‐II emissions, respectively. However, there a need emit region when excited by visible light. Although energy transfer method combining two considered, this review focuses on types structures, discussing common strategies tune host The goal achieve desired shift broadness entire spectrum, highlighting importance spectrum practical applications.

Language: Английский

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NIR‐II Luminescence in Cr⁴⁺ Activated CaYGaO₄ toward Non‐Invasive Temperature Sensing and Composition Detection

Laser & Photonics Review, Journal Year: 2023, Volume and Issue: 18(1)

Published: Oct. 29, 2023

Abstract Near‐infrared (NIR) II region (1000–1700 nm) lighting sources possess special potential for temperature sensing and quantitative composition analysis. However, it is a challenge to tune the luminescence toward such long wavelength NIR‐II emission. Herein, Cr 4+ ions occupation designed verified in olivine‐type CaYGaO 4 as [CrO ] tetrahedron by site occupancy confinement. Under 620 nm red light excitation, phosphors display broadband emission centered at 1330 with full width half maximum (FWHM) of 233 nm, resulting from spin‐allowed 3 T 2 A transition d symmetry. The optical thermometry application demonstrated decoding spectral shift decay times varying temperature, relative sensitivities are 5.82% 0.78% K −1 , respectively. Furthermore, flexible film containing :Cr fabricated implement non‐invasive detections fillet NH concentration ammonia. This work represents step developing next‐generation materials widens detection applications.

Language: Английский

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Boosting broadband short-wave infrared emission to achieve near-unity quantum efficiency via bridging Cr³⁺–Ni²⁺ in spinel solid-solutions towards light-emitting diode applications

Dalton Transactions, Journal Year: 2024, Volume and Issue: 53(9), P. 4214 - 4221

Published: Jan. 1, 2024

Cr 3+ and Ni 2+ codoped Mg 0.5 Zn Ga 2 O 4 SWIR phosphor exhibits a broadband emission centered at 1304 nm with FWHM of 250 nm, achieving near-unity internal quantum efficiency (IQE = 97.7%) good thermal stability (70.7%@423 K).

Language: Английский

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Thermally Stable NIR Emission from Disordered Ba₅La₃MgAl₃O₁₅:Cr³⁺ with Peak Wavelength Beyond 900 nm

Advanced Optical Materials, Journal Year: 2024, Volume and Issue: 12(16)

Published: Jan. 15, 2024

Abstract Broadband near‐infrared (NIR) emissions in the long wavelength region with simultaneous high efficiency and thermal stability are desirable for NIR phosphor‐converted light‐emitting diodes (NIR pc‐LEDs) light sources. Herein, a novel broadband NIR‐emitting phosphor is reported, Ba 5 La 3 MgAl O 15 :Cr 3+ (BLMAO:Cr ), which exhibits emission band spanning 700–1300 nm maximum peak ( λ max ) at 925 full width half of 160 nm. The optimized achieves an internal quantum 66%, integrated intensity 423 K remains 61% that room temperature, surpasses most Cr ‐activated phosphors emitting long‐wavelength > 900 nm). luminescence properties elucidated on basis density functional calculations multiple local structures as generated by Ba/La occupation disorder host material. applications pc‐LED devices demonstrated, showing potential night‐vision nondestructive examination. results indicate BLMAO:Cr promising highly efficient thermally stable LED

Language: Английский

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Highly Thermal Stable Broadband Near-Infrared Luminescence in Ni²⁺-Doped LaAlO₃ with Charge Compensator

ACS Applied Optical Materials, Journal Year: 2023, Volume and Issue: 1(6), P. 1128 - 1137

Published: March 21, 2023

Ni2+-doped LaAlO3 perovskite ceramic samples with a charge compensator (M4+) were prepared and their luminescent properties investigated. The LaAlO3:Ni2+–M4+ (M = Sn, Hf, Ti, Zr) perovskites show broad near-infrared (NIR) luminescence peaking at around 1070 nm 150 fwhm due to the Ni2+:3T2-3A2 transition. Sn4+-codoped one showed highest NIR intensity. valence state of major Ni ions is changed from Ni3+ Ni2+ by codoping Sn4+ based on X-ray absorption spectroscopy. LaAlO3:Ni2+–Sn4+ shows shortest peak wavelength (λem nm) 300 K strong crystal field also quenching temperature, T50% 608 in temperature dependence PL intensity, largest activation energy among phosphors ever reported. Based positive trend plot vs energy, it concluded that dominant process almost all thermally activated crossover process. It demonstrated shifted 1235 continuously substituting Ga for Al site.

Language: Английский

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Blue light-excited broadband NIR-II-emitting Li₂ZnSn₃O₈:Cr³⁺,Ni²⁺ phosphor for multifunctional optical applications

Inorganic Chemistry Frontiers, Journal Year: 2024, Volume and Issue: 11(15), P. 4711 - 4720

Published: Jan. 1, 2024

Utilizing the effective energy transfer from Cr 3+ to Ni 2+ realize blue Light Excited Broadband NIR-II-emitting Li 2 ZnSn 3 O 8 :Cr ,Ni Phosphor.

Language: Английский

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Main Group Elements Activated Near‐Infrared Photonic Materials

Laser & Photonics Review, Journal Year: 2024, Volume and Issue: 18(6)

Published: Jan. 18, 2024

Abstract Near‐infrared (NIR) photonic materials find extensive applications across important fields such as telecommunications, laser radar, and atmospheric remote sensing. In particular, activated by main group elements, which exhibit unique spectral features including ultra‐broadband tunable luminescence long lifetime, have become rising stars in NIR emitting dopants. this review, the energy level characteristics of p ‐electrons to gain insight into fundamentals optical response from elements are first introduced. Next, properties discussed. Then, strategy for design with desired based on local chemical environment engineering is proposed. addition, recent advances element (excluding bismuth) highlighted. Furthermore, key scientific issues that urgently need be solved materials, detailed mechanism Anticipation also extends future research trends exciting field, ways enhancing efficiency extending region, efforts implementing these advancements novel cutting‐edge technologies like photovoltaics biomedicine.

Language: Английский

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