Designing and controlling the Ni2+-activated (Zn, Mg)Al2O4 spinel solid-solution for phosphor-converted broadband near-infrared illumination

Chen, Jiayuan; Gao, Yuan; Chen, Jialin; Lu, Xirui; Tan, Mengdie; Qiu, Jianbei

doi:10.1039/d2tc05068d

Cited by 31 publications

(15 citation statements)

References 58 publications

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“…NIR phosphor-converted lightemitting diodes (NIR pc-LEDs) are gradually becoming the mainstream of a NIR light source due to their low cost, long life, and high luminous efficiency. 8,9 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. 10,11 So far, many Cr 3+ -doped NIR phosphors with oxide or fluoride-based matrices have been reported.…”

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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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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“…7 Ni 2+ is an ideal activator for NIR luminescent materials, and a Ni 2+ -doped phosphor has broadband emission characteristics that cover the NIR-II window with a half-maximum width (FWHM) as broad as 300 nm. 8,9 However, the quantum efficiencies of Ni 2+ -doped NIR luminescent materials are relatively low, examples include: BaTiO 3 (B6.2%), 10 CaTiO 3 (B4.3%), 11 MgTiO 3 (B3.1%), 10 SrTiO 3 (B6.5%), 10 LiGa 5 O 8 (B10%), 11 and Mg 2 SiO 4 (B1%), 12 which makes them less suitable for use as near-infrared light sources. One of the main reasons for the low luminescence efficiency of Ni 2+ -doped NIR materials is a charge imbalance caused by the substitution of the trivalent or tetravalent ions in the matrix materials by divalent Ni 2+ , resulting in electron defects, which deactivates the activator and negatively affects the luminescent properties of phosphors.…”

Section: Introductionmentioning

confidence: 99%

Synergistic enhancement of the near-infrared luminescence properties of Ni²⁺-doped SrTiO₃ perovskite phosphors and their application

et al. 2023

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“…It has the advantages of excellent efficiency, high photoelectric conversion efficiency, and large optical output. A continuous laser-based emitter can be used to excite QD glass and achieve high-intensity lighting without the limiting overcurrent-related “efficiency dip” issue. − A high conversion efficiency (radiated power ratio) can be obtained under a high driving current with a semiconductor laser light source. LD-based illumination technology is mature and has been used for infrared imaging and detection; , however, there have been few studies on the use of perovskite quantum dot glass for LD-based illumination.…”

Section: Introductionmentioning

confidence: 99%

Engineering CsPbX₃ (X = Cl, Br, I) Quantum Dot-Embedded Borosilicate Glass through Self-Crystallization Facilitated by NaF as a Phosphor for Full-Color Illumination and Laser-Driven Projection Displays

Zhou

Liu

et al. 2023

ACS Appl. Mater. Interfaces

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All inorganic perovskite (CsPbX 3 , X = Cl, Br, I) quantum dot (QD) glass samples are considered the next generation of lighting materials for their excellent luminescence properties and stability, but crystallization conditions are difficult to control, which often leads to the inhomogeneous crystallinity of QDs. Here, we provided evidence that the presence of sodium fluoride induced self-crystallization of CsPbBr 3 QDs during routine glass formation without the need for additional heat treatment. We showed that NaF simultaneously affected the network structure of glass and promoted the formation of CsPbBr 3 QDs, that is, Na + ions entered the glass network skeleton, partially interrupting the network structure, while the strong electronegativity of F − ions attracted Cs + and Pb 2+ ions into the gaps formed in the glass networks that had been loosened up by Na + ions, which reduced the activation energy of crystallization processes. Our results showed that NaF-induced CsPbBr 3 QDs glass had excellent thermal stability, high photoluminescence quantum efficiency (49%), and luminescent stability under high-power laser irradiation. Finally, this work also demonstrated the general applicability of this method in the making of a series of CsPbX 3 (X = Cl, Br, I) QD glass samples by NaF-induced self-crystallization, which drastically expanded the color gamut to a range of full spectrum for luminescence and laser-driven projection displays. We believe that the work presented here represents a new direction for the research and development of full-color gamut inorganic perovskite quantum dot glass samples, which could have a significant impact on the future applications of laser-driven projection displays as well.

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Designing and controlling the Ni²⁺-activated (Zn, Mg)Al₂O₄ spinel solid-solution for phosphor-converted broadband near-infrared illumination

Abstract: Ni2+-activated Zn1−xMgxAl2O4 phosphors exhibit broadband NIR emission band of 1000–1600 nm and are utilized in the application of broadband pc-NIR LEDs.

Cited by 31 publications

References 58 publications

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

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

Synergistic enhancement of the near-infrared luminescence properties of Ni²⁺-doped SrTiO₃ perovskite phosphors and their application

Engineering CsPbX₃ (X = Cl, Br, I) Quantum Dot-Embedded Borosilicate Glass through Self-Crystallization Facilitated by NaF as a Phosphor for Full-Color Illumination and Laser-Driven Projection Displays

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Designing and controlling the Ni2+-activated (Zn, Mg)Al2O4 spinel solid-solution for phosphor-converted broadband near-infrared illumination

Abstract: Ni2+-activated Zn1−xMgxAl2O4 phosphors exhibit broadband NIR emission band of 1000–1600 nm and are utilized in the application of broadband pc-NIR LEDs.

Cited by 31 publications

References 58 publications

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

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

Synergistic enhancement of the near-infrared luminescence properties of Ni2+-doped SrTiO3 perovskite phosphors and their application

Engineering CsPbX3 (X = Cl, Br, I) Quantum Dot-Embedded Borosilicate Glass through Self-Crystallization Facilitated by NaF as a Phosphor for Full-Color Illumination and Laser-Driven Projection Displays

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Designing and controlling the Ni²⁺-activated (Zn, Mg)Al₂O₄ spinel solid-solution for phosphor-converted broadband near-infrared illumination

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

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

Synergistic enhancement of the near-infrared luminescence properties of Ni²⁺-doped SrTiO₃ perovskite phosphors and their application

Engineering CsPbX₃ (X = Cl, Br, I) Quantum Dot-Embedded Borosilicate Glass through Self-Crystallization Facilitated by NaF as a Phosphor for Full-Color Illumination and Laser-Driven Projection Displays