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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Summary of the 2023 (1st edition) Report of TCEP (Tracking Clean Energy Progress) by the International Energy Agency (IEA), and Proposed Process for Computing a Single Aggregate Rating

E3S Web of Conferences, Journal Year: 2025, Volume and Issue: 601, P. 00048 - 00048

Published: Jan. 1, 2025

We provide a summary of the progress all 53 assessed components describing global alignment with Net Zero Emissions by 2050 Scenario (NZE) International Energy Agency (IEA), an intermediate trajectory scope 2030. The (grouped in eight categories) cover sectors (such as Transport, and Buildings), subsectors Aviation, Building Envelopes), technologies Biofuels, Electrification), infrastructure cross-cutting strategies CO2 Transport Storage, Electrolyzers). For each component, IEA assigned one three qualitative levels; namely “On track”, “More efforts needed”, or “Not on track”. IEA’s assessment results were made publicly available form online web-based report, titled “Tracking Clean Progress”, TCEP, which was published 12/July/2023. Out TCEP’s components, only rated these are (1) Solar Photovoltaic (PV), (2) Electric Vehicles (EV), (3) Lighting. remaining 50 TCEP; 28 22 propose quantitative aggregate numerical score to describe overall clean energy transition reflected TCEP we compute it 2.23/4 (or 55.7%). Finally, present selected historical records (based data) about satisfactory for transition.

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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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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Guest-Molecule-Induced Glass-Crystal Transition in Organic–Inorganic Hybrid Antimony Halides

Inorganic Chemistry, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 18, 2025

The glassy state of inorganic-organic hybrid metal halides combines their excellent optoelectronic properties with the outstanding processability glass, showcasing unique application potential in solar devices, display technologies, and plastic electronics. Herein, by tailoring organic cation from N-phenylpiperazine to dimethylamine gradually, four types zero-dimensional antimony are obtained various optical thermal properties. guest water molecules crystal (N-phenylpiperazine)2SbCl6·Cl·5H2O lead largest distortion Sb-halogen unit, resulting red emission different yellow other compounds. More importantly, molecule-induced hydrogen-bond network would prolong relaxation time into an equilibrium state, formation state. This is previous strategy adopting large cations for glass transition. Through rheological studies, we shape initial understanding underlying kinetics halide glass. work provides a simpler more convenient approach developing superior processing performance.

Language: Английский

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Thermally Activated Delayed Fluorescence of Organic–Inorganic Hybrid Menshutkin-Type Cu–Sb Halides

Inorganic Chemistry, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 19, 2025

Organic-inorganic hybrid metal halides have attracted much attention due to their excellent optoelectronic properties. The heterometallic structure is expected achieve more complex luminescence centers, thereby improving the tunability of fluorescent materials. This paper reports synthesis crystals [Cu(2,2'-bpy)(PPh3)2][CuCl2(PPh3)2Sb2OCl4] (1, 2,2'-bpy = 2,2'-bipyridine, PPh3 triphenylphosphine) and (Mim)2[Sb2OCl6] (2, Mim 1-methylimidazole). Crystal 1 a new Menshutkin-type compound with double-layer hamburger-type structure, which characterized by main group (lone pair)···π (arene) supramolecular interactions. shows bright yellow light emission at room temperature has thermally activated delayed fluorescence (TADF) characteristic than twice increase PL intensity from 170 320 K. crystal arises charge transfer cation unit, as confirmed comparison study 2. Density functional theory (DFT) calculations further clarify that enhanced performance narrower bandgap are additional Cu(I) unit. good thermal stability air stability, ensuring its anti-counterfeiting application. work provides strategy for construction Cu-Sb compound.

Language: Английский

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Large‐Area Stable Flexible X‐Ray Scintillation Screens with Group IIB Ions Doped CsMnCl₃ Microcrystals

Laser & Photonics Review, Journal Year: 2025, Volume and Issue: unknown

Published: April 1, 2025

Abstract Lead‐free metal halide perovskites and derivatives microcrystals (MCs) have become emerging candidates for X‐ray scintillation imaging applications. However, the luminescent properties of micrometric crystals need to be further improved, development flexible screens utilizing large‐scale MCs remains a significant challenge. Here, all‐inorganic manganese (Mn)‐based perovskite CsMnCl 3 are reported by room‐temperature solution‐synthesized co‐precipitation method. Introducing an amount Group IIB divalent cations (i.e., Zn Cd in this work) into greatly increases photoluminescence quantum yield (PLQY) from 48.2% 92.3% :1.5% (82.5% :1%Cd MCs). The feature excellent performance achieve low detection limit 22.53 nGy air s −1 . Furthermore, solvent engineering adding n‐hexane mixture doped polydimethylsiloxane (PDMS) assists fabricating 100 cm 2 large‐area uniform screens. As result, spatial resolution :1.5%Zn@PDMS achieves 7.6 line pairs (lp) mm , which is among best values @PDMS In addition, high‐resolution applications non‐planar objects achieved. work offers promising approach develop high‐performance based on large‐size imaging.

Language: Английский

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Advances in perovskite nanomaterials: Synthesis and catalytic applications in energy and environmental remediation

International Journal of Hydrogen Energy, Journal Year: 2025, Volume and Issue: 130, P. 560 - 594

Published: April 28, 2025

Language: Английский

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Chemical Composition Regulation for Tuning the Luminescent Properties of Organic–Inorganic Metal Halides

ChemPhotoChem, Journal Year: 2025, Volume and Issue: unknown

Published: May 4, 2025

Organic–inorganic metal halides (OIMHs) exhibiting superior optoelectronic properties have shown broad applications in sensing, photovoltaic devices, information storage, and biological imaging. Compared with pure inorganic or organic materials, OIMHs are distinguished by their hybrid feature, processability of components robustness units, as well plentiful luminescent sources derived from ligands, self‐trapped excitons (STEs) lattices, the energy transfer between species. Thereinto, chemical composition tunability component, ions, halogen provides multiple adjustable sites to tailor structures physicochemical properties. However, how realizing effective tunable luminescence for desired through rational regulation has become a challenge. In this review, starting structurally OIMHs, feasible methods regulating summarized, which include change components, dimensionality configurations species, heterometal systematic multisite fine‐tuning based on specific matrix. Finally, challenges synthesize promising performance discussed.

Language: Английский

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Optical Property Regulation through Host–Guest Interaction in a Zero-Dimensional Zr Chloride

Chemistry of Materials, Journal Year: 2024, Volume and Issue: 36(9), P. 4600 - 4606

Published: April 23, 2024

Halide perovskites, particularly zero-dimensional (0D) A2BX6-type structures, have garnered significant attention in diverse fields due to their exceptional photoelectric properties. This study focuses on the optical property regulation of 0D A2ZrCl6 through nonprotonated cation substitution (A = [(CH3)3SO]+ and [(CH3)4N]+) combined with different guest ions (i.e., Sb3+, Bi3+, Mn2+). The varied host–guest interaction is regarded as reason for luminescent behaviors. Sb3+ dopant has a weaker host [(CH3)3SO]2ZrCl6 than Mn2+ does. As result, Sb3+@[(CH3)3SO]2ZrCl6 shows an excitation-dependent photoluminescence ranging from blue orange, while Mn2+@[(CH3)3SO]2ZrCl6 exhibits only emission under excitation wavelengths. Besides effect interaction, organic can impact behavior well. [(CH3)4N]2ZrCl6 preferences ions. are favorable [(CH3)3SO]2ZrCl6, Bi3+ adopted [(CH3)4N]2ZrCl6. Due colors dopants, possesses behaviors engineering. Inside [(CH3)4N]2ZrCl6, weak showing PL centers excitations.

Language: Английский

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