An Overview for Zero‐Dimensional Broadband Emissive Metal‐Halide Single Crystals

Advanced Optical Materials, Journal Year: 2021, Volume and Issue: 9(17)

Published: May 31, 2021

Abstract The high‐profile candidacy of low‐dimensional metal‐halide single crystals as promising light emitters originates from the intriguing emission properties (e.g., extremely broad luminescence spectra, large Stokes shift, high color rendition), which have enabled recent great achievements on their application in lighting, artificial illumination, and scintillators. Among family crystals, zero‐dimensional (0D) materials been featured lowest dimensionality, a consequence, strongest quantum confinement, softest lattice, electron–phonon coupling further translated into near‐unity photoluminescence (PL) efficiency with broadband emission. However, far it is known, 0D structures are significantly underexplored. Herein, an overview provided advances focus comprehensive understanding insightful perspectives behind photophysical mechanism. Additionally, challenges future opportunities currently faced by bulk metal halides discussed order to provide roadmap for development novel versatile optical suited practical applications.

Language: Английский

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Sb-Doped Metal Halide Nanocrystals: A 0D versus 3D Comparison

ACS Energy Letters, Journal Year: 2021, Volume and Issue: 6(6), P. 2283 - 2292

Published: May 27, 2021

We synthesize colloidal nanocrystals (NCs) of Rb3InCl6, composed isolated metal halide octahedra ("0D"), and Cs2NaInCl6 Cs2KInCl6 double perovskites, where all share corners are interconnected ("3D"), with the aim to elucidate compare their optical features once doped Sb3+ ions. Our computational analyses evidence that photoluminescence quantum yield (PLQY) these systems is consistently lower than corresponding bulk materials due presence deep surface traps from under-coordinated Also, Sb-doped "0D" Rb3InCl6 NCs exhibit a higher PLQY "3D" NCs, most likely because excitons responsible for PL emission migrate faster in 3D 0D NCs. also observe feature large Stokes shift (varying system system), should be interest applications photon management scintillation technologies. Scintillation properties evaluated via radioluminescence experiments, re-absorption-free waveguiding performance large-area plastic scintillators assessed using Monte Carlo ray-tracing simulations.

Language: Английский

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Activation of Self‐Trapped Emission in Stable Bismuth‐Halide Perovskite by Suppressing Strong Exciton–Phonon Coupling

Advanced Functional Materials, Journal Year: 2021, Volume and Issue: 31(31)

Published: June 10, 2021

Abstract All‐inorganic bismuth‐halide perovskites are promising alternatives for lead halide due to their admirable chemical stability and optoelectronic properties; however, these materials deliver inferior photoluminescence (PL) properties, severely hindering prospects in lighting applications. Here, a novel air‐stable but non‐emissive perovskite Rb 3 BiCl 6 is synthesized, the material used as prototype uncover origin of poor optical performance perovskite. It found that extremely strong exciton–phonon interactions with large coupling constant up 693 meV leads seriously nonradiative recombination, which, can be effectively suppressed 347 by introducing Sb 3+ ions. As result, ‐doped exhibits stable yellow emission unprecedented PL quantum yield 33.6% from self‐trapped excitons. Systematic spectroscopic characterizations theoretical calculations carried out unveil intriguing photophysical mechanisms. This work reveals effect interaction, often underemphasized, on material's properties.

Language: Английский

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Ultra‐Sensitive, Selective and Repeatable Fluorescence Sensor for Methanol Based on a Highly Emissive 0D Hybrid Lead‐Free Perovskite

Angewandte Chemie International Edition, Journal Year: 2022, Volume and Issue: 61(35)

Published: June 7, 2022

A convenient and rapid detection method for methanol in ethanol remains a major challenge due to their indistinguishable physical properties. Herein, novel fluorescence probe based on perovskite was successfully designed overcome this bottleneck. We report new zero-dimensional (0D) hybrid of [MP]2 Inx Sb1-x Cl7 ⋅ 6 H2 O (MP=2-methylpiperazine) displaying an unusual green light emission with near-unity photoluminescence quantum yield. Remarkably, 0D exhibits reversible methanol-response luminescence switching between yellow color but fail any other organic vapors. Even blended alcohol solutions, the luminescent excellent sensing performance multiple superiorities response time (30 s) ultra-low limit (40 ppm), etc. Therefore, can be utilized as perfect detect traces from ultrahigh sensitivity, selectivity repeatability. To best our knowledge, work represents first wide potential environmental monitoring detection,

Language: Английский

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Advances in Near-Infrared Luminescent Materials without Cr³⁺: Crystal Structure Design, Luminescence Properties, and Applications

Chemistry of Materials, Journal Year: 2021, Volume and Issue: 33(14), P. 5496 - 5526

Published: July 13, 2021

Near-infrared (NIR) luminescent materials are attracting much attention as the promising applications in food composition analysis, night vision, biosensors, and so on. Besides Cr3+ ions, other ions such Eu2+, Ce3+, Bi3+, etc. recently also exhibit remarkable broadband NIR light emission inorganic hosts. The key issues to optimize their photoluminescence quantum yield reveal an unclear "structure-luminescence" relationship. Herein, properties of without systematically summarized. Importantly, we propose a significant influence local crystal structure on luminescence properties. These strategies contain (i) ligand covalency, (ii) strong field distorted lattice, (iii) selective sites occupation, (iv) mixed valences doping level control. proposed relationship can provide new insight into exploit current materials. Furthermore, concept "high-throughput DFT prediction-crystal design-photoluminescence performances optimization" is summarized swiftly develop targeted Subsequently, energy transfer application prospects detail. This review discusses between based high-throughput method. offer guidance series novel clarify underlying mechanisms.

Language: Английский

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Bright Green Emission from Self-Trapped Excitons Triggered by Sb³⁺ Doping in Rb₄CdCl₆

Chemistry of Materials, Journal Year: 2022, Volume and Issue: 34(12), P. 5717 - 5725

Published: June 10, 2022

Sb3+ with stereochemically active lone pair 5s2 electrons is overwhelming in the doping engineering of luminescent metal halides, and it usually leads to extrinsic self-trapped excitons (STEs) tunable emissions. However, photoluminescence enhancement mechanism doped halides compared pristine host remains unclear. Herein, we into all-inorganic non-emissive Rb4CdCl6, realizing bright green emission peaking at 525 nm a quantum yield 70.2%. A comparison Raman spectra, as well Debye temperature, was utilized elucidate STEs mechanism, verifying that softens structural lattice. Thus, strong electron–phonon interactions enable highly efficient originating from Rb4CdCl6:Sb3+. This work demonstrates solid evidence emissions can be triggered by doping, design principle involved will guide future studies for emerging luminescence material exploration.

Language: Английский

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Highly efficient Sb3+ emitters in 0D cesium indium chloride nanocrystals with switchable photoluminescence through water-triggered structural transformation

Nano Today, Journal Year: 2022, Volume and Issue: 44, P. 101460 - 101460

Published: March 21, 2022

Language: Английский

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Highly Distorted Antimony(III) Chloride [Sb₂Cl₈]²⁻ Dimers for Near‐Infrared Luminescence up to 1070 nm

Angewandte Chemie International Edition, Journal Year: 2022, Volume and Issue: 61(33)

Published: June 23, 2022

Zero-dimensional (0D) hybrid metal halides with unique compositional and structural tunability appear as an emerging class of luminescent materials, but near-infrared (NIR) emitters therein are largely unexplored to date. This study presents three novel 0D antimony chlorines edge-sharing [Sb2 Cl8 ]2- dimers, showing unusual room-temperature broadband NIR emission the maximum wavelength up 1070 nm. Photoluminescence studies density functional theory calculation demonstrate that emissions originate from highly localized excitons, confined dimers in these structures show low symmetry a large degree freedom. These expand range new materials halides.

Language: Английский

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Reversible Triple-Mode Switching in Photoluminescence from 0D Hybrid Antimony Halides

Chemistry of Materials, Journal Year: 2022, Volume and Issue: 34(15), P. 6985 - 6995

Published: July 19, 2022

Hybrid metal halides are an emerging class of highly efficient photoluminescent (PL) materials. However, very few them show reversible on–off PL switching under external stimuli and have the potential to perform as next-generation intelligent materials with applications in cutting-edge photoelectric devices. Herein, we report single crystal-to-single crystal (SC–SC) structural transitions among three 0D hybrid antimony halides, namely, nonemissive α-[DHEP]SbCl5 (1), yellow-emissive β-[DHEP]SbCl5·2H2O (2), red-emissive β-[DHEP]SbCl5 (3), by a dynamic phonon-engineering strategy. The SC–SC transformation between 1 2 is triggered acetone or methanol, affording switching. transition solids achieved 3 through process removal/adsorption guest water molecules. Meanwhile, performed introduction which accompanied quenching red emission. Therefore, triple-mode off–onI–onII–off realized halide hybrids for first time, including off–onI (yellow), color-tunable onI–onII (yellow-red), onII–off (red) modes. More importantly, make suitable successful protection anti-counterfeiting confidential information well optical logic gates.

Language: Английский

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(C16H28N)2SbCl5: A new lead-free zero-dimensional metal-halide hybrid with bright orange emission

Science China Materials, Journal Year: 2022, Volume and Issue: 65(6), P. 1594 - 1600

Published: Jan. 29, 2022

Language: Английский

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