Multisite Fine‐Tuning in Hybrid Cadmium Halides Enables Wide Range Emissions for Anti‐Counterfeiting

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(15)

Published: Feb. 13, 2024

Abstract Achieving tunable emissions spanning the spectrum, from blue to near‐infrared (NIR) light, within a single component is formidable challenge with significant implication, particularly in tailoring multicolor luminescence for anti‐counterfeiting purposes. In this study, we demonstrate broad spectrum of emissions, covering red and extending into NIR light [BPy] 2 Cd X 4 : x Sb 3+ (BPy=Butylpyridinium; =Cl, Br; =0 0.08) through precise multisite structural fine‐tuning. Notably, CdBr manifest distinctive pattern, transitioning yellow tandem host further its homologous CdCl , resulting simultaneous presence intersecting independent emission colors. Detailed modulation chemical composition enables partial switching, facilitating creation diverse patterns by employing as phosphors. This study first time successfully implements several groups colors matrix via Such an effective strategy not only develops specific relationships between adjustable compositions, but also introduces cost‐effective straightforward approach achieving unique, high‐level, plentiful‐color multiple‐information‐storage labels advanced applications.

Language: Английский

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Guanidinium‐Based Manganese(II) Bromide with High Glass‐Forming Ability for Thermoplastic Curved X‐ray Imaging

Laser & Photonics Review, Journal Year: 2024, Volume and Issue: 18(7)

Published: Feb. 25, 2024

Abstract The development of large‐area transparent organic‐inorganic hybrid metal halide (OIMH) scintillation screens is restricted by the anisotropic single‐crystal growth, numerous grain boundaries in polycrystalline wafers, and inhomogeneous dispersion perovskite‐polymer composite films. crystal‐glass phase transition OIMH materials may provide a promising solution for above significant challenges. Herein, new class amorphous guanidinium‐based manganese bromide glasses, (DPG) 2 MnBr 4 (DOTG) (DPG = 1,3‐diphenylguanidinium, DOTG 1,3‐di‐o‐tolylguanidinium), are synthesized through low‐temperature melt‐quenching process. shows impressive glass‐forming ability because large viscosity ( η ) at melting temperature T m 3426 mPa·s) small fragility index 52.35), which can be potential glass scintillator. (e.g., 13 cm × cm) scintillator high light transmittance > 80%, low detection limit 237.3 nGy s −1 X‐ray imaging spatial resolution 12 lp mm . Interestingly, < 40 °C gives unique thermoplastic properties, allowing it to conform irregularly shaped objects reduce distortion imaging.

Language: Английский

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Stable Organic‐Inorganic Hybrid Sb(III) Halide Scintillator for Nonplanar Ultra‐Flexible X‐Ray Imaging

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 5, 2024

Abstract Flexible scintillator screens with excellent stability and low detection limits are crucial for X‐ray imaging applications. 0D organic metal halide materials have emerged as a strong contender in the fields, owing to their optical characteristics simple maneuverability. Herein, high‐quality large quantities of C 38 H 36 P 2 Sb Cl 8 single crystals synthesized through solution approach. The prepared dimer‐structure [Sb ] 2− exhibit yellow emission near‐unity high photoluminescence quantum yield (PLQY) 99.8%, possess an exceptional light 41300 photons MeV −1 , limit 45.6 nGy air s . On this basis, large‐size ultra‐flexible utilized is by template assembled method, demonstrating spatial resolution 8.15 lp mm screen can achieve even after multiple bending stretching, which also provide clear non‐planar irregular objects. In addition, shows light, heat, irradiation, water. These results not only expand optoelectronic application field organic‐inorganic hybrid antimony halides but promote rapid development efficient scintillators.

Language: Английский

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Halide-driven polarity tuning and optimized SHG-bandgap balance in (C₄H₁₁N₂)ZnX₃ (X = Cl, Br, I)

Inorganic Chemistry Frontiers, Journal Year: 2024, Volume and Issue: 11(17), P. 5587 - 5597

Published: Jan. 1, 2024

The halide substitutions in (C 4 H 11 N 2 )ZnX 3 (X = Cl, Br, I) induce polarity tuning and then optimized SHG-bandgap balance.

Language: Английский

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Luminescence From Localized States in Solids: A First‐Principles Perspective

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: March 3, 2025

Abstract Localized‐state luminescence (LSL) has emerged as a promising mechanism for high‐performance optoelectronic applications, including lighting, photodetection, and quantum technologies. Characterized by rich intriguing spectral features, LSL involves significant electron‐phonon coupling, which varies in strength across different systems. First‐principles methods, particularly density functional theory (DFT) its extensions provide an efficient framework modeling the process with reasonable accuracy. This comprehensive review examines DFT‐based studies on three representative types of solids: from self‐trapped excitons (STEs), normal defects, intentionally doped ions. The discussion begins overview entire process, highlighting computational methods excited state structures energies, well simulations luminescent spectrum within multi‐phonon transition framework. Detailed discussions follow, focusing structural distortion modes STEs, behavior mechanisms Finally, strategies to address current challenges advance theoretical design materials are proposed, offering valuable insights future developments field.

Language: Английский

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Antimony Doped Hybrid Zinc Halide Crystals with Tunable Light Emission and Long‐Term Stability

Advanced Optical Materials, Journal Year: 2024, Volume and Issue: 12(12)

Published: Jan. 15, 2024

Abstract As a class of emerging photoluminescent materials, hybrid halide crystals have drawn research attention for their potential application in the fields light‐emitting, security, and waveguide. Nevertheless, containing antimony with long‐term stability tunable light emission are still increasingly demand. In this work, serial new (BZA) 2 ZnCl 4 ·2H O: x Sb 3+ ( = 0–0.2, represents reaction ratio) SbCl 5 synthesized (BZA 2,4‐diamino‐6‐phenyl‐1,3,5‐triazine). crystals, cations replace partial Zn 2+ to form [SbCl ] − tetrahedron. Red caused by substitution enhances as doping rate increases, resulting from blue pink finally dark red. There two kinds crystal. Sb(1) has sixfold coordination Cl [Sb(1)Cl ]∞ 1D zigzag chain. Sb(2) atom adopts fivefold is separated each other BZA + cations. crystal shows bright orange‐yellow photoluminescence quantum yield 45%. Moreover, organic–inorganic metal excellent stability, phase luminescence keeping nearly unchanged after more than six months ambient air.

Language: Английский

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Highly Luminescent Zero-Dimensional Organic Metal (Zn, Mn) Alloyed Halides as Single-Component Yellow Phosphor for White LED Applications

ACS Applied Energy Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 12, 2025

Zero-dimensional organic zinc halides have garnered significant attention as efficient and eco-friendly photoluminescent materials. However, its luminance efficiency, which is typically attributed to self-trapped excitons formed within halide tetrahedra, often encounters a serious thermal quenching problem. This issue significantly limits application in the field of solid-state lighting. Intriguingly, incorporation tetra-coordinated Mn2+ ions into these can effectively mitigate unnecessary electron interactions nonradiative energy transfer between Mn–Mn, achieving improved photoluminescence quantum yield (PLQY) alloyed In this work, series zero-dimensional Mn2+-alloyed 4-benzylpiperidinum chloride hybrids were designed synthesized by solvent evaporation method. It noteworthy that pure shows negligible visible emission at 510 nm, whereas (C12H12N)2MnxZn1–xCl4 (x = 0.25, 0.5, 0.75, 1) emits light ranging from green yellow room temperature. Incorporating Mn has led remarkable enhancement PLQY, increasing mere 4.02% an impressive 94.45% (C12H12N)2Mn0.75Zn0.25Cl4. The white LED was successfully fabricated employing optimal sample single-component phosphor coated on 450 nm chip. correlated color temperature determined be 4770 K with rendering index high 91. also demonstrated good luminous stability under different working currents. research provides straightforward approach for developing eco-friendly, cost-effective, high-performance phosphors applications.

Language: Английский

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Organic hybrid tetranuclear clusteroluminogens: Blue-light-excitable LED with ultrahigh luminous efficacy

Chemical Engineering Journal, Journal Year: 2023, Volume and Issue: 479, P. 147523 - 147523

Published: Nov. 20, 2023

Language: Английский

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Solvent-free blending of CsPbBr3 and commercial polymer: Interface-visualization, bandgap engineering and improved stability in 3D printing

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 482, P. 148965 - 148965

Published: Jan. 22, 2024

Language: Английский

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Ultrafast Visual Detection of a Trace Amount of Water by Highly Efficient Hybrid Manganese Halides

ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: 16(26), P. 33780 - 33788

Published: June 19, 2024

A quantitative water detection method is urgently needed in storage facilities, space exploration, and the chemical industry. Although numerous physical techniques have been widely utilized to determine content, they still suffer from many disadvantages such as highly expensive special instruments, complicated analysis processes, etc. Hence, a convenient, rapid, sensitive desirable. Herein, we developed visual fluorescence sensing technology for based on reversible PL off-on switching of organic–inorganic hybrid zero-dimensional (0D) manganese halides. In this work, family halides were synthesized through facile solution method, namely, [NH4(18-Crown-6)]2MnBr4, [Ca(18-Crown-6)·3H2O](18-Crown-6)MnBr4, [NH4(dibenzo-18-Crown-6)]2MnBr4, [Ca(dibenzo-18-Crown-6)·2H2O]MnBr4. Excited by UV light, these crystalline exhibit strong green light emissions d–d electron transition Mn2+ with near-unity photoluminescence quantum yield submillisecond lifetime. Benefiting dynamic weak ionic bonding interactions, 0D display water-response on/off luminescence but fail any other aprotic solvents. Therefore, can be explored ultrafast probes detect trace amount organic solvents multiple superiorities rapid response time (< 2 s), ultralow limit (9.71 ppm), excellent repeatability, The luminescent also provides binary optical gate advanced applications anticounterfeiting information security,

Language: Английский

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