Broadband MgGa₂O₄:Cr³⁺ Spinel with High Luminescence Thermal Stability for Near-Infrared Phosphor-Converted Light-Emitting Diodes

ACS Applied Optical Materials, Journal Year: 2025, Volume and Issue: unknown

Published: March 6, 2025

Language: Английский

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Broadband Near-Infrared CaHf4(PO4)6: Cr3+ Phosphor for Multi-functional Applications in Light-Emitting Diodes

Ceramics International, Journal Year: 2025, Volume and Issue: unknown

Published: March 1, 2025

Language: Английский

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Eu3+ co-doped broadband yellow-emitting BaZnSiO4: Bi3+ phosphors for multifunctional applications

Ceramics International, Journal Year: 2025, Volume and Issue: unknown

Published: March 1, 2025

Language: Английский

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Visible Light Excited Yb³⁺‐Doped Phosphor Via Eu²⁺ Bridged Energy Transfer Toward NIR‐II Spectroscopy Application

Laser & Photonics Review, Journal Year: 2025, Volume and Issue: unknown

Published: April 2, 2025

Abstract Yb 3+ is regarded as an efficient near‐infrared‐II (NIR‐II) emitting activator, which has been widely used in energy conversion, up‐conversion luminescence and optical communication. However, the simple level structure of makes it can only be excited by ultraviolet or infrared light, limits their application currently booming phosphor converted NIR‐II light diodes (NIR‐II pc‐LEDs). Here, “Eu 2+ bridge” strategy presented to largely extend absorption visible range, successfully realize pumped emission via transfer from Eu . Meanwhile, balance valence state reduced oxidized , pre‐prepared EuS precursor instead 2 O 3 significantly increases 6 times. Detailed enhancement mechanism are discussed. Finally, a pc‐LED fabricated with photoelectric efficiency 12.61%@50 mA output power 74.09 mW@300 mA. Subsequently, miniaturized real‐time test system integrated based on convolutional neural network technology accurate predict organic solvents different concentrations. This study not introduces new light‐excited ‐doped phosphors, but also promotes innovative NIR spectroscopy technology.

Language: Английский

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Unleashing the Potential of Defect Engineered Persistent Pr³⁺‐Activated Phosphors for Multi‐Dimensional Anti‐Counterfeiting and X‐Ray Imaging Applications

Small, Journal Year: 2025, Volume and Issue: unknown

Published: April 24, 2025

Abstract Persistent luminescence (PersL) in inorganic phosphors offers great potential for anti‐counterfeiting and optical storage, with optimization of PersL, multicolor tuning, defect engineering. This study presents a Ca 3 Ga 2 Ge O 12: Pr 3+ (CGGO:Pr) phosphor long‐lasting PersL emissions. Aliovalent codoping Er Yb ions optimizes deep/shallow trap redistribution, controlling depths from 0.98 to optimal 0.73 eV through the creation new shallow electron traps (Yb • , ) alongside existing V levels. The smart /Er /Yb :CGGO exhibits three‐dimensional visible emissions under 275 380 nm excitation, as well upconversion 980 laser irradiation. Hybrid density functional calculations, thermoluminescence, positron annihilation lifetime spectroscopy revealed nature different PersL. Together, single system featuring has been developed, exhibiting improved regulated (≈0.73 eV) suitable robust multimodal documents, pharmaceuticals, industrial products. Furthermore, composite PMMA‐CGGO:Pr films have shown remarkable capability X‐ray imaging, achieving resolution 4 lp/mm, which exceeds that commercial Gd S:Tb screens. These findings highlight this work advanced imaging applications, offering enhanced controlled depths.

Language: Английский

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Ultrabroad Short-Wave Infrared Emission Enabled by Chemical Unit Cosubstitution of Ni²⁺ in Fluoride K₂LiCrF₆:Ni²⁺ for Infrared Spectroscopy Applications

ACS Materials Letters, Journal Year: 2025, Volume and Issue: unknown, P. 2010 - 2016

Published: April 25, 2025

Language: Английский

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