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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Engineering tri-channel orthogonal luminescence in a single nanoparticle for Information Encryption

Inorganic Chemistry Frontiers, Год журнала: 2025, Номер unknown

Опубликована: Янв. 1, 2025

Tri-channel orthogonal luminescence under different excitation wavelengths is achieved in a single nanoparticle for information encryption.

Язык: Английский

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Green and Near-Infrared Dual-Band Photoluminescence in γ-AlON:Mn²⁺ Enables High-Level Anticounterfeiting and Encryption

Inorganic Chemistry, Год журнала: 2025, Номер unknown

Опубликована: Фев. 5, 2025

Multicolor luminescent materials hold great potential in high-level optical anticounterfeiting and encryption technologies. However, achieving multiple luminescence a single phosphor with dopant, especially covering visible invisible regions simultaneously, remains standing challenge. Herein, we successfully realize dual-band emission single-doped γ-AlON:Mn2+ phosphors. Under 450 nm light excitation, the low-doped γ-AlON:xMn2+ phosphors (x ≤ 0.02) emit narrowband green at 515 nm; however, when further increasing Mn2+ concentration, heavy-doped ≥ 0.05) samples display an additional broad near-infrared band peaking 730 nm. Such intriguing spanning from to regimes is assigned combined emissions of isolated tetrahedral ions superexchange-coupled Mn2+-Mn2+ pairs γ-AlON host. Exploiting distinct photoluminescence low- high-doped phosphors, double-level information demonstration. This work first presents dual-emission not only enabling but also shedding on tuning inorganic

Язык: Английский

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Persistent‐ and Mechanoluminescence of Er³⁺‐Doped NaYF₄ for Multipurpose Use

Small Methods, Год журнала: 2025, Номер unknown

Опубликована: Март 4, 2025

Abstract Advanced functional materials that possess both persistent luminescence (PersL) and mechanoluminescence (ML) have gained considerable attention during the past few years owing to their potential applications in many fields such as two‐dimensional stress sensing, energy‐saving lighting, optical bioimaging. However, combined investigation of PersL ML is still its infancy. Here, property Er 3+ ‐doped NaYF 4 , mainly focusing on characteristic correlation, studied detail. It shown microscaled :Er has advantages against nanoscaled counterpart terms ML, consistent with photoluminescence results. By means pre‐charging trap‐emptying cycle thermoluminescence test, it confirmed come from same trapped charge carriers, belongs trap‐controlled ML. Furthermore, good repeatability proven, regulation realized. Finally, for dynamic anti‐counterfeiting dual‐mode detection X‐ray radiation dose demonstrated.

Язык: Английский

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Enabling Persistent Luminescence of Eu³⁺ in Nanoparticles through Interfacial Energy Transfer for Advanced X-ray Imaging

Nano Letters, Год журнала: 2025, Номер unknown

Опубликована: Апрель 4, 2025

Persistent luminescence (PersL) emerged recently in nanoparticles which greatly promotes and expands their frontier applications. However, achieving X-ray-activated PersL of Eu3+ fluoride has remained a huge challenge. Here, we propose conceptual model to realize this aim by constructing the interfacial energy transfer core-shell nanostructure. We show that terbium sublattice is good sensitizer absorb X-ray activate shell with its resultant intense PersL. A gradual color change from red yellow green achieved fine manipulation interactions between Tb3+ Eu3+. Moreover, presence Tb lattice annihilates only radioluminescence, being helpful avoid ghost imaging. Our findings gain deep insight into mechanism nanoparticles, help design new classes materials provide possibilities for advanced flexible imaging

Язык: Английский

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Tunable Multi-color Luminescence of Single-Component BaAl4Sb2O12:Bi3+ Phosphors for Anti-Counterfeiting and Information Encryption

Ceramics International, Год журнала: 2025, Номер unknown

Опубликована: Апрель 1, 2025

Язык: Английский

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Unleashing the Potential of Defect Engineered Persistent Pr³⁺‐Activated Phosphors for Multi‐Dimensional Anti‐Counterfeiting and X‐Ray Imaging Applications

Small, Год журнала: 2025, Номер unknown

Опубликована: Апрель 24, 2025

Abstract Persistent luminescence (PersL) in inorganic phosphors offers great potential for anti‐counterfeiting and optical storage, with optimization of PersL, multicolor tuning, defect engineering. This study presents a Ca 3 Ga 2 Ge O 12: Pr 3+ (CGGO:Pr) phosphor long‐lasting PersL emissions. Aliovalent codoping Er Yb ions optimizes deep/shallow trap redistribution, controlling depths from 0.98 to optimal 0.73 eV through the creation new shallow electron traps (Yb • , ) alongside existing V levels. The smart /Er /Yb :CGGO exhibits three‐dimensional visible emissions under 275 380 nm excitation, as well upconversion 980 laser irradiation. Hybrid density functional calculations, thermoluminescence, positron annihilation lifetime spectroscopy revealed nature different PersL. Together, single system featuring has been developed, exhibiting improved regulated (≈0.73 eV) suitable robust multimodal documents, pharmaceuticals, industrial products. Furthermore, composite PMMA‐CGGO:Pr films have shown remarkable capability X‐ray imaging, achieving resolution 4 lp/mm, which exceeds that commercial Gd S:Tb screens. These findings highlight this work advanced imaging applications, offering enhanced controlled depths.

Язык: Английский

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Defects in Inorganic Mechanoluminescent Phosphors: Insights and Impacts

Advanced Functional Materials, Год журнала: 2025, Номер unknown

Опубликована: Апрель 27, 2025

Abstract Mechanoluminescence (ML), the light emission of materials in response to mechanical stimuli, has gained significant attention various fields due situ and real‐time “force light” converting ability. Defects dominate ML process, either for accommodating carriers or as sites carrier recombination. However, comprehensive discussions on ML‐based defects are rarely reported. The review opens with an exploration recent progress research, highlighting central role ML. A range defect types commonly exist firstly introduced, which aims highlight profound influences Subsequently reported defect‐dominated phosphors researched elucidate intricate relationship between specific their influence performance, shedding underlying luminescence mechanisms. Afterward, experimental techniques characterization also demonstrate how work computational modeling is confirmed act a powerful tool investigating atomistic mechanisms defect‐related processes enabling precise control materials. In conclusion, this mini‐review underscores centrality materials, offering integrated perspective potential guide future research endeavors.

Язык: Английский

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Advanced Anticounterfeiting Technologies Leveraging High-Efficiency Visible to Near-Infrared Luminescent Lead-Free Double Perovskites

Inorganic Chemistry, Год журнала: 2025, Номер unknown

Опубликована: Май 24, 2025

With the rapid development of markets and economies, various brands have raised higher demands for optical anticounterfeiting technology. Lead-free halide double perovskites with broadband self-trapped exciton emission excellent properties such as good visibility, diverse colors, simple designs, making them outstanding materials information encryption applications. In this study, we successfully synthesized lead-free dual centers by doping Sb3+ Cr3+ into Cs2NaScCl6. The blue (445 nm) originates from [SbCl6]3- octahedra, while near-infrared (980 comes luminescence ions. achieved a quantum efficiency up to 71% through efficient energy transfer among multiple centers. Finally, patterns were realized screen printing samples. research results provide inspiration designing tunable luminescent properties.

Язык: Английский

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Stable Long-Persistent Luminescence from Self-Activated CaSb₂O₆ Induced by Intrinsic Defects

Nano Letters, Год журнала: 2024, Номер 24(45), С. 14453 - 14459

Опубликована: Ноя. 5, 2024

Long-persistent luminescence (LPL) materials have attracted intensive attention due to their fascinating emission after excitation. However, current LPL typically depend on external doping introduce traps or emitting centers, resulting in a complex synthesis and controllability. For the first time, we develop another category of undoped based antimonate CaSb

Язык: Английский

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