A novel near-infrared phosphor Li_1.6Mg_1.6Sn_2.8O₈:Cr³⁺ for near-infrared spectral analysis

Journal of Materials Chemistry C, Год журнала: 2024, Номер unknown

Опубликована: Янв. 1, 2024

A novel near-infrared broadband phosphor Li 1.6 Mg Sn 2.8 O 8 :Cr 3+ for spectroscopy with a peak at 860 nm and an FWHM of 187 nm.

Язык: Английский

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La3Sc2Ga3O12:Cr3+, Nd3+ near-infrared phosphor for nondestructive detection and luminescence thermometry

Ceramics International, Год журнала: 2024, Номер 50(22), С. 46098 - 46106

Опубликована: Авг. 30, 2024

Язык: Английский

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Neighboring‐Cation Substitution Engineering Strategy toward High Performance in Near‐Infrared Light Source for Multifunctional Applications

Advanced Optical Materials, Год журнала: 2025, Номер unknown

Опубликована: Март 5, 2025

Abstract Efficient broadband near‐infrared (NIR)‐emitting phosphors with long‐wavelength emission peaks and high thermal stability are urgently needed as next‐generation smart NIR light sources. However, considerable challenges remain in developing high‐performing phosphors. Herein, a blue LED excitable Bi 1.8 Ga 1.2 SbO 7 : Cr 3+ (BGS: ) phosphor broad band long peak is designed synthesized. Further, strategy of neighboring‐cation substitution engineering proposed to improve the efficiency phosphor. The optimal 0.02Cr , 0.8In can generate an 700–1300 nm range full‐width at half‐maximum (FWHM) 198 nm. This has external quantum (EQE) 31.3% good 56.1% 423 K. A fabricated NIR‐LED device achieve output power 125.55 mW 300 mA photoelectric 17.45% 20 mA, demonstrating its application potential for night vision, bioimaging nondestructive detection. study offers new thoughts fulfill outstanding luminescent performances.

Язык: Английский

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Engineering Broadband Emission of Zn₂Ga_0.5‐yAl_ySb_0.5O₄∶Cr³⁺ Phosphors for Near‐Infrared LED Application

Small, Год журнала: 2025, Номер unknown

Опубликована: Май 5, 2025

Abstract In phosphor‐converted light‐emitting diode (pc‐LED)‐based near‐infrared light sources for biochemical analysis and medical diagnostics, phosphors with broadband (NIR) emission play an important role, obtaining such is a great challenge. Herein, efficient NIR‐emitting Zn 2 Ga 0.5‐y Al y Sb 0.5 O 4 :Cr 3+ are developed by introducing to gradually replace in the host through crystal engineering. Spectral densitometric calculations show that this homogeneous cation substitution strategy optimizes local lattice environment significantly suppresses nonradiative relaxation of Cr centers, thus exhibiting strong NIR properties. addition, ions varied low‐temperature emissions notable temperature sensitivity differences among centers. At 90 K, material achieves maximum relative 1.45% K −1 , highlighting its potential as thermosensitive applications sensing. The LED source fabricated based on shows significant response different liquids transmission spectral analysis, suggesting identification organic compounds.

Язык: Английский

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Study on the Performance of Deep Red to Near-Infrared pc-LEDs by the Simulation Method Considering the Distribution of Phosphor Particles

Micromachines, Год журнала: 2024, Номер 15(8), С. 1035 - 1035

Опубликована: Авг. 15, 2024

Effectively utilizing deep red to near-infrared (DR-NIR) phosphors achieve the optimal performance of NIR phosphor-converted white LEDs (DR-NIR pc-wLEDs) is currently a research hotspot. In this study, an optical model DR-NIR pc-wLEDs with virtual multilayer fluorescent films was established based on Monte Carlo ray-tracing method. Different gradient distributions particles were assigned within film explore their impact pc-LEDs. The results show that, for case single-type particles, distributing more far from blue LED chip increased overall radiant power. distribution near conversion ratio light. 707 nm fluorescence emission intensity 450 excitation light 1:0.51 1:0.28. For multiple-type changes in resulted dual-nature changes, leading deterioration color rendering index and increase correlated temperature, while also improving band ratio. reabsorption caused by partial overlap between other enhanced power at nm. Distributing phosphor closer effectively amplified effect. proposed its provide solution forward design particle improve luminous pc-wLEDs.

Язык: Английский

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Interstitial oxygen defect inducing near-infrared luminescence in Ca3La2W2O12 phosphor

Journal of Alloys and Compounds, Год журнала: 2024, Номер 1010, С. 177970 - 177970

Опубликована: Дек. 12, 2024

Язык: Английский

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A novel near-infrared phosphor NaGa(WO4)2:Cr3+ with distinctive 998 nm emission for efficient non-invasive detection

Journal of Alloys and Compounds, Год журнала: 2024, Номер unknown, С. 178097 - 178097

Опубликована: Дек. 1, 2024

Язык: Английский

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