Phosphor‐in‐Ceramic‐Converted Laser‐Driven Near‐Infrared Light Sources for Multiple Intelligent Spectroscopy Applications

Advanced Materials, Год журнала: 2024, Номер unknown

Опубликована: Ноя. 3, 2024

Abstract Ultrabright broadband near‐infrared (NIR) phosphor‐converted laser diode (pc‐LD) as a light source is increasingly essential for improving the sensitivity and spatial resolution of intelligent NIR spectroscopy technologies. However, performance pc‐LD greatly hindered by low external quantum efficiency (EQE) poor thermal resistance phosphor materials. Herein, highly stable phosphor‐in‐ceramic (PiC) film deposited on high conductivity substrate, in which NIR‐emitting Ca 3 MgHfGe O 12 :Cr 3+ incorporated into glass‐crystallized Ga 2 Ge ceramic matrix, along with formation new type PiC composite material efficiency, absorbance, conductivity, designed prepared. The obtained exhibits an impressive EQE 57.7%, 17.1 W m −1 K , wheel demonstrates emission exceeding 5 when excited 450 nm laser. Finally, groundbreaking electrically driven device based achieves 1.6 output, enabling multiple applications archaeology night vision imaging. This work paves way advancing sources diverse range photonic applications.

Язык: Английский

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Excitation-mode-selective emission through multiexcitonic states in a double perovskite single crystal

Light Science & Applications, Год журнала: 2025, Номер 14(1)

Опубликована: Янв. 2, 2025

Abstract Low-dimensional lead-free metal halide perovskites are highly attractive for cutting-edge optoelectronic applications. Herein, we report a class of scandium-based double perovskite crystals comprising antimony dopants that can generate multiexcitonic emissions in the ultraviolet, blue, and yellow spectral regions. Owing to zero-dimensional nature crystal lattice minimizes energy crosstalk, different excitonic states be selectively excited by ultraviolet light, X-ray irradiation, mechanical action, enabling dynamic control steady/transient-state features modulating excitation modes. Remarkably, transparent exhibits efficient white photoluminescence (quantum yield >97%), blue emission with long afterglow (duration >9 h), high-brightness self-reproducible violet-blue mechanoluminescence. These findings reveal exceptional capability low-dimensional integrating various luminescence, offering exciting opportunities multi-level data encryption all-in-one authentication technologies.

Язык: Английский

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Emerging 0D Hybrid Metal Halide Luminescent Glasses

Advanced Materials, Год журнала: 2025, Номер unknown

Опубликована: Янв. 2, 2025

0D hybrid metal halide (HMH) luminescent glasses have garnered significant attentions for its chemical diversity in optoelectronic applications and it also retains the skeleton connectivity coordination mode of crystalline counterparts while exhibiting various physics/chemistry characteristics distinct from states. However, understanding glass-forming ability specific structural origins underpinning properties HMH remains elusive. In this review, is started solid-liquid phase transition thermodynamic analysis HMHs formed through melt-quenching, summarize current compounds capable stably forming glassy phases via design. The characterization methods are further discussed highlight exceptional transparency, properties, glass crystallization behaviors. Moreover, application prospects demonstrated by these been presented accordingly X-ray detection imaging, anti-counterfeiting, information encryption. Finally, perspective offered into future development emerging family their applications.

Язык: Английский

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Light‐Emitting Diodes Based on Metal Halide Perovskite and Perovskite Related Nanocrystals

Advanced Materials, Год журнала: 2025, Номер unknown

Опубликована: Янв. 29, 2025

Abstract Light‐emitting diodes (LEDs) based on halide perovskite nanocrystals have attracted extensive attention due to their considerable luminescence efficiency, wide color gamut, high purity, and facile material synthesis. Since the first demonstration of LEDs MAPbBr 3 was reported in 2014, community has witnessed a rapid development performances. In this review, historical perspective is provided then comprehensive survey current strategies for high‐efficiency lead‐based LEDs, including synthesis optimization, ion doping/alloying, shell coating presented. Then basic characteristics emission mechanisms lead‐free perovskite‐related emitters environmentally friendly from standpoint different colors are reviewed. Finally, progress LED applications covered an outlook opportunities challenges future developments field provided.

Язык: Английский

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Superior Multimodal Luminescence in a Stable Single‐Host Nanomaterial with Large‐Scale Synthesis for High‐Level Anti‐Counterfeiting and Encryption

Advanced Science, Год журнала: 2025, Номер unknown

Опубликована: Янв. 13, 2025

Multimode luminescent materials exhibit tunable photon emissions under different excitation or stimuli channels, endowing them high encoding capacity and confidentiality for anti-counterfeiting encryption. Achieving multimode luminescence into a stable single material presents promising but remains challenge. Here, the downshifting/upconversion emissions, color-tuning persistent (PersL), temperature-dependent multi-color hydrochromism are integrated Er3+ ions doped Cs2NaYbCl6 nanocrystals (NCs) by leveraging shallow defect levels directed energy migration. The resulting NCs display strong static dynamic colorful in response to ultraviolet, 980-nm laser, X-ray. Additionally, distinct colors as temperature increases from 330 430 K. Surprisingly, it also demonstrates ability of reversible emission modal color water. Theoretical calculations experimental characterizations reveal that self-trapped exciton state (STEs), chlorine vacancy defects, ladderlike 4f contribute multimodal luminescence. More importantly, has extremely remarkable environmental stability, which can be stored air more than 18 months, showing commercial prospects. This work not only gives new insights lanthanide-based metal halide provides route developing nanomaterials

Язык: Английский

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Bandgap Narrowing in Europium(II)-Based Bromide Hybrids toward Improved X-ray Scintillation and Imaging

Chemistry of Materials, Год журнала: 2024, Номер 36(9), С. 4813 - 4820

Опубликована: Апрель 26, 2024

Chemical design of luminescent metal halides as high-performance X-ray scintillators is in urgent demand. Herein, rare earth Eu(II) was innovated a B-site cation to create brand-new halide scintillators, and regulating bandgap further developed via organic molecule based on the same anionic chain [EuBr3MeOH]nn–, namely, [Cat]EuBr3MeOH [Cat = 1-butyl-1-methylpiperidinium (PP14), 1-propyl-1-methylpiperidinium (PP13), 1-ethyl-3-methylimidazolium (Emim)]. Owing smaller [Emim]Br, [Emim]EuBr3MeOH possesses an enhanced light yield 43,000 ± 100 ph MeV–1 scintillators. The conjugated attribute Emim+ also contributes π–π stacking, resulting more rigid structure, reducing nonradiative transition. scintillator film by using emanates spatial resolution above 10 lp mm–1. This study provides principle cations screening engineering for enhancing property exemplifies novel materials family hybrids potential

Язык: Английский

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Highly thermally stable SrLaMgTaO6: Cr3+ double-perovskite phosphors for night-vision applications

Ceramics International, Год журнала: 2024, Номер 50(16), С. 28707 - 28714

Опубликована: Май 12, 2024

Язык: Английский

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Temperature-dependent self-trapped models regulating energy transfer in rare earth double perovskites via 5s² electron doping

Inorganic Chemistry Frontiers, Год журнала: 2024, Номер 11(12), С. 3607 - 3617

Опубликована: Янв. 1, 2024

Sb 3+ /Sm co-doping can effectively modulate the luminescence by adjusting energy transfer in Cs 2 NaYCl 6 double perovskites. Two minima excited state of 3 P 1 enable self-trapped exciton emission at low temperatures.

Язык: Английский

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Solution Synthesis and Light-Emitting Applications of One-Dimensional Lead-Free Cerium(III) Metal Halides

Nano Letters, Год журнала: 2024, Номер 24(33), С. 10355 - 10361

Опубликована: Авг. 9, 2024

Combining rare earth elements with the halide perovskite structure offers valuable insights into designing nonlead (Pb) luminescent materials. However, most of these compositions tend to form zero-dimensional (0D) networks metal-halide polyhedra, higher-dimensional (1D, 2D, and 3D) structures receiving relatively less exploration. Herein, we present synthesis optical properties Cs

Язык: Английский

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Multimode Luminescence Tailoring in PMA₄Na(In,Sb)Cl₈ Organic–inorganic Hybrid Metal Halide via Rigid Benzene Ring Induced Local Lattice Distortion

Angewandte Chemie International Edition, Год журнала: 2024, Номер 63(50)

Опубликована: Авг. 16, 2024

Abstract Low dimensional organic‐inorganic hybrid metal halide materials have attracted extensive attention due to their superior optoelectronic properties. However, low photoluminescence quantum yields (PLQYs) caused by parity‐forbidden transition hinder further application in devices. Herein, a novel yellow‐emitting PMA 4 Na(In,Sb)Cl 8 (C 7 H 10 N + , ) low‐dimensional OIMHs single crystal with PLQY as high 88 % was successfully designed and synthesized, originating from the fact that doping of Sb 3+ effectively relaxes strong spin‐orbit (SO) coupling Jahn‐Teller (JT) interaction. The as‐prepared shows an efficient dual emission peaking 495 560 nm at temperature, which are ascribed different levels 3 P 1 → S 0 transitions [SbCl 6 ] 3− octahedral JT deformation. Moreover, wide‐range luminescence tailoring cyan orange can be achieved through adjusting excitation energy temperature because flexible PNIC lattice. Based on relative stiff lattice environment, yellow under 350 light exhibits abnormal anti‐thermal quenching 400 K owing suppression non‐radiative transition. multimode regulation enriches great potential field optoelectronics such sensing, anti‐counterfeiting WLED applications.

Язык: Английский

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