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

Ceramics International, Год журнала: 2024, Номер 50(13), С. 23685 - 23693

Опубликована: Апрель 10, 2024

Язык: 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, Год журнала: 2024, Номер 6(10), С. 4555 - 4563

Опубликована: Сен. 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

Язык: Английский

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Efficient near‐infrared emission in lanthanum ion doped double perovskite Cs₂NaScCl₆ via Cr³⁺ sensitization under visible light excitation

EcoMat, Год журнала: 2024, Номер 6(3)

Опубликована: Янв. 25, 2024

Abstract Herein, we synthesized Cr 3+ /Ln (Er , Tm )‐codoped rare earth‐based Cs 2 NaScCl 6 double perovskite, and the near‐infrared emission of Ln can be excited by visible light through energy transfer (ET) from to . Moreover, there are two independent bands, which stems 4 T → A transition (970 nm) f‐f (1542 nm for Er 1220 ), respectively. Particularly, both compounds have ultra‐high photoluminescence quantum yield (PLQY) 60% 10%Cr /6%Er ‐codoped emission: ∼26%) 68% /4.5%Tm (Tm ∼56%), attributed ET efficiency similar ionic activity Sc allowing more dopants enter host lattice. Considering excellent stability samples, demonstrated /Tm in applications imaging night vision. Finally, reported /9%Er ‐tridoped further applied it optical thermometry. image

Язык: Английский

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

Ceramics International, Год журнала: 2024, Номер 50(17), С. 31474 - 31481

Опубликована: Май 29, 2024

Язык: Английский

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High performance NIR-I to NIR-II emission of a Cr³⁺-doped Cs₂NaLuCl₆ phosphor with an IQE and EQE of up to 92.9% and 60.75%

Inorganic Chemistry Frontiers, Год журнала: 2024, Номер unknown

Опубликована: Янв. 1, 2024

We developed a Cr 3+ -doped Cs 2 NaLuCl 6 by grinding–sintering method, which exhibited emission peaked at around 960 nm, with FWHM of ∼182 and the IQE EQE optimized phosphor were as high ∼92.9% ∼60.75%, respectively.

Язык: Английский

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BaLiZn₃(PO₄)₃:Eu²⁺: Ultranarrow-Band Violet Emission in a Highly Symmetric Crystal Structure

Chemistry of Materials, Год журнала: 2024, Номер 36(3), С. 1763 - 1772

Опубликована: Янв. 31, 2024

The development of narrow-band emitting phosphors is still a pivotal challenge for light-emitting diode (LED) backlights in liquid-crystal displays (LCDs). Hereon, an effective tactic raised to develop novel violet emission Eu2+-doped BaLiZn3(PO4)3 with highly symmetric site and rigid crystal structure. Under the ultraviolet (UV) light excitation 334 nm, this BLZPO:Eu2+ shows super at 387 nm full width half-maximum (fwhm) 11 7 K 18 298 K, respectively. Such ultranarrow-band has never been achieved previous phosphors. Moreover, as-prepared phosphor presents small photoluminescence (PL) thermal quenching, its PL intensity maintains 82.6% 150 °C 70% 200 initial room temperature. as-fabricated LED utilizing n-UV exhibits potential anticounterfeiting application. This study offers idea achieve supernarrow-band Eu2+-activated based on

Язык: Английский

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Ultrabroadband Long-Wavelength Near-Infrared MgIn₂O₄:Ni²⁺ Phosphor Synthesized via Sol–gel Combustion Method as a Light Source for Night Vision Imaging, Nonvisual Detection, and Anticounterfeiting Display

ACS Applied Materials & Interfaces, Год журнала: 2024, Номер 16(36), С. 47952 - 47960

Опубликована: Авг. 27, 2024

Long-wavelength near-infrared (LWNIR) imaging technology has exciting application potential across various fields due to its ability of deeper penetration and unique properties related emission wavelength, when compared short-wavelength imaging. However, the limited availability materials for LWNIR light sources, lack suitable host that constitute luminescence centers, been a major challenge technical obstacle in realizing such applications. Here, we developed MgIn

Язык: Английский

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Enhanced Near-Infrared Luminescence and Thermal Stability in Cr3+-Activated Y2CaAl4SiO12 Phosphors: Towards High-Performance NIR Light Sources

Ceramics International, Год журнала: 2025, Номер unknown

Опубликована: Янв. 1, 2025

Язык: Английский

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Broadband NIR emission properties of Fe3+-activated aluminate with double peaks via occupying two sites

Journal of Alloys and Compounds, Год журнала: 2025, Номер unknown, С. 179639 - 179639

Опубликована: Март 1, 2025

Язык: Английский

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Tailoring the Emission Properties of Cs₂NaLuCl₆ for Anti‐Counterfeiting, X‐Ray Scintillation, and Night Vision Applications

Advanced Optical Materials, Год журнала: 2025, Номер unknown

Опубликована: Янв. 8, 2025

Abstract The ever‐increasing counterfeiting issues have triggered a research upsurge in multi‐modal fluorescence anti‐counterfeiting materials. All inorganic metal halide double perovskites possess the advantages of facile preparation procedures and high thermal stability, which also provide suitable doping sites to regulate emission behavior highlight potential for serving as Herein, series Sb 3+ , Er Yb solely or codoped Cs 2 NaLuCl 6 are successfully prepared, optical properties dependent on ratio lanthanide ions (Ln ). Notably, due participation energy‐transfer cross‐relaxation processes, tri‐doped (0.3%Sb ‐20%Er ‐50%Yb ‐Cs ) shows luminescence responses excitation sources with different photon energies, is employed construct patterns by combining . Besides behavior, NIR from can be used night‐vision device. Remarkably, 20%Er ‐doped an excellent light yield 30767 photons MeV −1 low limit detection (LoD) 108 nGy s highlighting X‐ray imaging. This work provides rational route design multi‐functional materials that anti‐counterfeiting, night vision,

Язык: Английский

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