Sol-gel combustion synthesis and near-infrared luminescence of Ni2+-doped MgAl2O4 spinel phosphor

Ceramics International, Journal Year: 2024, Volume and Issue: 50(7), P. 12319 - 12325

Published: Jan. 10, 2024

Language: Английский

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Strategy of Charge Compensation for High-Performance Ni²⁺-Activated MgAl₂O₄ Spinel Near-Infrared Phosphor Synthesis via the Sol–Gel Combustion Method

Inorganic Chemistry, Journal Year: 2024, Volume and Issue: 63(14), P. 6555 - 6563

Published: March 26, 2024

Near-infrared (NIR) phosphor conversion light-emitting diodes (pc-LEDs) have great application potential as NIR light sources in many fields such food analysis, night vision illumination, and bioimaging for noninvasive medical diagnosis. In general, phosphors synthesized by a high-temperature solid-phase method large particle sizes to be processed fine powders grinding process, which may introduce surface defects lower the luminous efficiency. Here, we report sol–gel sintering with ammonium nitrate citric acid sacrificing agents synthesize high purity, nanosized (less than 50 nm) Zr4+/Ni2+ codoped MgAl2O4 spinel phosphors, is matrix, Ni2+ center, Zr4+ acts charge compensator. We systematically characterized crystal structures luminescence properties of Ni2+-doped MgAl2O4. Under 390 nm excitation, emission spectrum covers 900–1600 nm, half-peak width 251 peak position located at 1230 nm. demonstrated that incorporating small amounts compensator, intensity was doubled over phosphor. The optimal content compensator 2 mol %. More importantly, inclusion led improved thermal stability properties, measured 100 °C 33.83% room temperature (20 °C). This study demonstrates nanomaterials high-purity enhanced optical can designed through compensation strategy method.

Language: Английский

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Sr2AlTaO6: Ni2+ phosphors with excellent IQE and thermal stability as NIR-II source for night vision, nonvisual detection, and far-field imaging

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: 505, P. 159559 - 159559

Published: Jan. 13, 2025

Language: Английский

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A Nickel-doped, lanthanum gallium germanate-based phosphor as an ultra-broadband short-wavelength infrared region emitter for optical imaging

Ceramics International, Journal Year: 2024, Volume and Issue: 50(13), P. 23685 - 23693

Published: April 10, 2024

Language: Английский

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Long-Wavelength Near-Infrared MgIn₂O₄:Ni²⁺ Phosphor with 47.93% IQE and 34.66% EQE for Night Vision Lighting, Nonvisual Detection, and Biological Imaging

ACS Materials Letters, Journal Year: 2024, Volume and Issue: 6(10), P. 4555 - 4563

Published: Sept. 3, 2024

Presently, there are very limited options for a broad-band long-wavelength near-infrared phosphor-converted light-emitting diode (LWNIR pc-LED) with wavelengths above ∼1500 nm, and most LWNIR phosphors have low luminescence quantum efficiency. Here, Ni2+-doped MgIn2O4 antispinel were prepared by high-temperature solid-state reaction method. Under 365 nm excitation, they exhibited emission in the range of 1200–2100 an peak ∼1490 full width at half-maximum ∼313 indicating weak crystal field environment high electron polarization around center [MgO6] octahedron. The IQE EQE MgIn2O4:Ni2+ ∼47.93% ∼34.66%, respectively. optimized phosphor was encapsulated LED chip to obtain pc-LED device night vision lighting, nonvisual detection, biological imaging. Our results confirmed that lighting based imaging technology showed clear safety advantages over traditional high-energy ray

Language: Английский

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Ultra-broadband near-infrared emission of Cr3+-containing oxy-fluoride glass-ceramics

Ceramics International, Journal Year: 2024, Volume and Issue: 50(17), P. 31474 - 31481

Published: May 29, 2024

Language: Английский

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The synthesis and application of Ni2+-doped NIR-II Phosphors composed of MgAl2-xGaxO4 solid-solution

Journal of Alloys and Compounds, Journal Year: 2024, Volume and Issue: 1005, P. 175914 - 175914

Published: Aug. 8, 2024

Language: Английский

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Long-wavelength near-infrared light emitting Ni²⁺-doped double perovskite molybdate-based solid-solution phosphors

Journal of Materials Chemistry A, Journal Year: 2024, Volume and Issue: unknown

Published: Jan. 1, 2024

We developed Ni 2+ -doped (Sr/Ba) 2 MgMoO 6 double perovskite molybdate-based solid-solution long wavelength near-infrared luminescence (1000–2000 nm) phosphors, which shiftss in the range of 1400–1610 nm by simple adjustment Sr/Ba ratio.

Language: Английский

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Cr³⁺-Doped LiAlO₂ NIR-I Emitting Phosphors with Superior Resistance to Thermal Quenching for Night Vision Monitoring and Bioimaging

ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: 16(44), P. 60599 - 60607

Published: Oct. 22, 2024

Near-infrared phosphor-converted light-emitting diodes (NIR pc-LEDs) as a new NIR light source has outstanding application potential in the fields of spectroscopy analysis, sensing, imaging, and pattern recognition. Therefore, development phosphors with good luminescence thermal stability attracted much attention. To this end, we developed LiAlO2:Cr3+ garnet-type by high-temperature solid-state reaction method. Under 405 nm excitation, Cr3+ ions located tetrahedrons LiAlO2 emit emission broadband that covers 650-900 mixed several sharp narrowband R-line emissions, which showed excellent integrated intensity measured at 573 K is ∼90.86% 303 caused structural rigidity low expansion coefficient matrix material. An pc-LED device assembled optimized commercially available purple LED chip emitted output power ∼98.172 mW driving current 300 mA demonstrated an electro-optical conversion efficiency ∼9.09%, while it night vision monitoring biomedical imaging.

Language: Английский

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Fe3+-activated BaZrO3 with broadband NIR-II phosphor for large-area Illumination, non-visual and biomedical imaging

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 161473 - 161473

Published: March 1, 2025

Language: Английский

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