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

ACS Applied Optical Materials, Год журнала: 2025, Номер unknown

Опубликована: Март 6, 2025

Язык: Английский

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

Ceramics International, Год журнала: 2025, Номер unknown

Опубликована: Март 1, 2025

Язык: Английский

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

Ceramics International, Год журнала: 2025, Номер unknown

Опубликована: Март 1, 2025

Язык: Английский

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

Laser & Photonics Review, Год журнала: 2025, Номер unknown

Опубликована: Апрель 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.

Язык: 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, Год журнала: 2025, Номер unknown

Опубликована: Апрель 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.

Язык: 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, Год журнала: 2025, Номер unknown, С. 2010 - 2016

Опубликована: Апрель 25, 2025

Язык: Английский

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Efficient and Stable Short‐Wave Infrared‐Emitting from Partly Inverse Spinel ZnGa₂O₄: Fe³⁺, Ni²⁺ for Versatile Applications: Self‐Photoluminescence, Anion Substitution, and Energy Transfer Study

Laser & Photonics Review, Год журнала: 2025, Номер unknown

Опубликована: Май 24, 2025

Abstract NIR phosphors based on commercial LED pumping are gained great concerns. However, blue excitation and lack of broadband still obstacles. Herein, NIR‐II emitting ZnGa 2 O 4 : Fe 3+ , Ni 2+ with autologous defects designed. Self‐PL is associated intrinsic including [GaO 6 ], antisite () oxygen ( i ). Based efficient energy transfer, ZGO: exhibits emission. To improve PL efficiency an repairing engineering via anionic F − ‐substitution artifice executed, resulting in high quantum ≈64.6% splendid thermal stability (≈75.5%@423K) for ZGOF: . The reduction local site symmetry after F‐substitution splits states purely octahedral crystal field also helps to relief the Laporte selection rule widens excitation/PL spectra efficiency. A phosphor‐converted (pc‐LED) by combination a n UV chip remote ʻcappingʼ packaging strategy radiant power fabricated its versatile applications night vision, non‐destructive detection, food analysis optical pressure sensing demonstrated. This study paves feasible way realize high‐quality phosphor corresponding device wide applications.

Язык: Английский

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Bifunctional Energy Efficient (Ga,Ge)₂O₃:Cr³⁺,Ni²⁺ Phosphor for Shortwave Infrared Optical Applications

ACS Energy Letters, Год журнала: 2025, Номер unknown, С. 3050 - 3057

Опубликована: Июнь 5, 2025

Язык: Английский

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