Efficient broadband near-infrared emission induced by Nb5+ substitution for Ta5+ in GaTa1−yNbyO4:Cr3+ phosphor

Lou, Lulu; Zhao, Shuang; Yuan, Shuhan; Zhu, Daoyun; Wu, Fugen; Mu, Zhongfei

doi:10.1039/d2qi00711h

Cited by 28 publications

(13 citation statements)

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“…Very recently, researchers utilized the introduction of Nb 5+ into GaTaO 4 to induce lattice distortion enhancement, which is beneficial for breaking the forbidden transition of Cr 3+ , thereby effectively improving the blue light absorption of NIR emitting phosphors. [ 67 ] In addition, the increased Dq/B by Nb 5+ substitution leads to an increase in radiative transition of Cr 3+ , contributing to the higher QE values.…”

Section: Different Types For Cr3+‐doped Phosphor Materialsmentioning

confidence: 99%

Recent Advances in Chromium‐Doped Near‐Infrared Luminescent Materials: Fundamentals, Optimization Strategies, and Applications

Dang

Wei

Liu

et al. 2022

Advanced Optical Materials

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Development of chromium-doped luminescent materials is pertinent to many emerging applications, ranging from agriculture, food industry to noninvasive health monitoring. The fundamental importance of chromium-activated luminescent materials in the field of optics and biomedicine makes the rapid development of novel materials and relevant applications. Herein, the recent advances on the luminescence principle and photoluminescence (PL) optimization for Cr 3+ -activated luminescent materials together with their potential applications are reviewed. The different types of most recently developed Cr 3+ -doped luminescent materials and the design principles are systematically summarized. The associations between crystal structure and nearinfrared (NIR) PL properties, as well as performance-evaluating parameters are introduced with the examples of known NIR emitting phosphors, which will be helpful to explore future NIR luminescent materials. Based on crystal field control, site engineering, and electron-phonon coupling, several efficient strategies for optimizing luminescence performances including bandwidth, thermal stability, and quantum efficiency of Cr 3+ -doped NIR luminescent materials are proposed. Then, potential applications in the fields of food analysis, night vision, information encryption, and optical sensors are surveyed. Finally, the challenges of promising Cr 3+ -doped luminescent materials are proposed.

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Section: Different Types For Cr3+‐doped Phosphor Materialsmentioning

confidence: 99%

Recent Advances in Chromium‐Doped Near‐Infrared Luminescent Materials: Fundamentals, Optimization Strategies, and Applications

Dang

Wei

Liu

et al. 2022

Advanced Optical Materials

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“…Even new lattice sites for luminescence are created. [13,16,46,47] Here, NIR luminescence with an extensive control range from 1165 to 875 nm (maximum peak) is achieved in LiInGeO 4type solid solution phosphors by using substitutions of Sc 3+ → In 3+ and [Mg 2+ Mg 2+ ] → [Li + In 3+ ] to form continuous solid solutions and using substitution of [Zn 2+ Zn 2+ ] → [Li + In 3+ ] to form finite solid solutions. A new ultra-broadband LIZGO:Cr 3+ phosphor with a large FWHM of 508 nm is obtained.…”

Section: Pl Spectral Modulation Based On Solid Solution Strategymentioning

confidence: 99%

Super Broadband Near‐Infrared Solid Solution Phosphors with Adjustable Peak Wavelengths from 1165 to 875 nm for NIR Spectroscopy Applications

Huang

Shang

et al. 2022

Advanced Optical Materials

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Due to its wide application in chemical, pharmaceutical, and food science et al., infrared radiation has attracted considerable research attention. [1][2][3] The nearinfrared (NIR) region located in the range of 700-900 nm is usually called NIR-I, and 1000-1700 nm is classified as NIR-II, which has good tissue penetration ability. So, it has attractive application prospects in nondestructive inspection, food processing, and night vision technologies. [4,5] Tungsten halogen lamps and laser diodes, as the traditional NIR light sources, are expected to be replaced by NIR phosphorconverted light-emitting diodes (pc-LEDs) that feature great superiority in low cost, high efficiency, and compactness. NIR pc-LEDs are usually comprised of a LED chip as the primary excitation source and phosphors with NIR-emitting as the lightconversion material. Therefore, the used NIR-emitting phosphors determine the performance of NIR pc-LEDs. Since Cr 3+ can absorb UV and blue light effectively and emit broadband NIR light, it has been the most widely explored activator for broadband NIR-emitting phosphors in recent years, [6] such as

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“…Cr 3+ has an electronic configuration of 3d 3 with an unparalleled broadband NIR emission property, which typically is affected by the crystal field environment and electron–phonon coupling. , So far, many Cr 3+ -doped NIR phosphors with oxide or fluoride-based matrices have been reported. Figure a lists the luminescence spectrum range and FWHM of recently reported Cr 3+ -activated broadband NIR phosphors. − Regarding the application, NIR-I region (700–1000 nm) has a relatively limited tissue penetration depth and higher background due to tissue auto-luminescence, NIR-II region (1000–1400 nm), at longer wavelength NIR in particular, have lower scattering, deeper tissue penetration, and higher imaging resolution. Medical imaging based on NIR-II has better clarity and less interference from endogenous substances .…”

Section: Introductionmentioning

confidence: 99%

Achieving Broadband NIR-I to NIR-II Emission in an All-Inorganic Halide Double-Perovskite Cs₂NaYCl₆:Cr³⁺ Phosphor for Night Vision Imaging

Zhu

Gao

Zhao

et al. 2023

ACS Appl. Mater. Interfaces

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Near-infrared phosphor-converted light-emitting diodes (NIR pc-LEDs) offer numerous advantages, including compact size, tunable emission spectra, energy efficiency, and high integration potential. These features make them highly promising for various applications, such as night vision monitoring, food safety inspection, biomedical imaging, and theragnostics. Allinorganic halide double-perovskite materials, known for their large absorption cross section, excellent defect tolerance, and long carrier diffusion radius, serve as unique matrices for constructing nearinfrared fluorescent materials. In this study, we successfully prepared the all-inorganic metal halide double-perovskite Cs 2 NaYCl 6 :Cr 3+ using a grinding−sintering method. A small fraction of the [YCl 6 ] octahedra within the host material's lattice was substituted with Cr 3+ ions, resulting in the creation of the Cs 2 NaYCl 6 :Cr 3+ phosphor. When excited with λ = 310 nm UV light, the phosphor exhibited a broad emission range spanning from 800 to 1400 nm, covering the NIR-I and NIR-II regions. It had a broad bandwidth emission of 185 nm and achieved a fluorescence quantum yield of 20.2%. The unique broadband emission of the phosphor originates from the weak crystal field environment provided by the Cs 2 NaYCl 6 host matrix, which enhances the luminescence properties of the Cr 3+ ions. To create NIR pc-LEDs, the phosphor was encapsulated onto a commercially available UV LED chip operating at 310 nm. The potential application of these NIR pc-LEDs in night vision imaging was successfully validated. KEYWORDS: all-inorganic metal halide double perovskite, Cr 3+ -doped Cs 2 NaYCl 6 phosphor, broadband NIR-I and NIR-II emission, night vision imaging, phosphor-converted light-emitting diodes

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Efficient broadband near-infrared emission induced by Nb⁵⁺ substitution for Ta⁵⁺ in GaTa_1−yNb_yO₄:Cr³⁺ phosphor

Abstract: An ultra-high external quantum efficiency (EQE ≈ 49.4%) is achieved by substituting Ta5+ with Nb5+ in GaTa1−yNbyO4:Cr3+ phosphor.

Cited by 28 publications

References 50 publications

Recent Advances in Chromium‐Doped Near‐Infrared Luminescent Materials: Fundamentals, Optimization Strategies, and Applications

Recent Advances in Chromium‐Doped Near‐Infrared Luminescent Materials: Fundamentals, Optimization Strategies, and Applications

Super Broadband Near‐Infrared Solid Solution Phosphors with Adjustable Peak Wavelengths from 1165 to 875 nm for NIR Spectroscopy Applications

Achieving Broadband NIR-I to NIR-II Emission in an All-Inorganic Halide Double-Perovskite Cs₂NaYCl₆:Cr³⁺ Phosphor for Night Vision Imaging

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Efficient broadband near-infrared emission induced by Nb5+ substitution for Ta5+ in GaTa1−yNbyO4:Cr3+ phosphor

Abstract: An ultra-high external quantum efficiency (EQE ≈ 49.4%) is achieved by substituting Ta5+ with Nb5+ in GaTa1−yNbyO4:Cr3+ phosphor.

Cited by 28 publications

References 50 publications

Recent Advances in Chromium‐Doped Near‐Infrared Luminescent Materials: Fundamentals, Optimization Strategies, and Applications

Recent Advances in Chromium‐Doped Near‐Infrared Luminescent Materials: Fundamentals, Optimization Strategies, and Applications

Super Broadband Near‐Infrared Solid Solution Phosphors with Adjustable Peak Wavelengths from 1165 to 875 nm for NIR Spectroscopy Applications

Achieving Broadband NIR-I to NIR-II Emission in an All-Inorganic Halide Double-Perovskite Cs2NaYCl6:Cr3+ Phosphor for Night Vision Imaging

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Efficient broadband near-infrared emission induced by Nb⁵⁺ substitution for Ta⁵⁺ in GaTa_1−yNb_yO₄:Cr³⁺ phosphor

Achieving Broadband NIR-I to NIR-II Emission in an All-Inorganic Halide Double-Perovskite Cs₂NaYCl₆:Cr³⁺ Phosphor for Night Vision Imaging