Temperature/Component‐Dependent Luminescence in Lead‐Free Hybrid Metal Halides for Temperature Sensor and Anti‐Counterfeiting

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(34)

Published: June 6, 2024

Abstract Hybrid metal halides (HMHs) have emerged as a promising platform for optically functional crystalline materials, but it is extremely challenging to thoroughly elucidate the electron transition coupled additional ligand emission. Herein, discover sequences of lead‐free HMHs with distinct active cations are aimed, that is, Sb 3+ (5s 2 ) lone‐pair configuration and In (4d 10 fully‐filled configuration. (Me NH 4 M Cl 6 ·Cl = −CH 3 , Sb, In) exhibits superior temperature/component‐dependent luminescence behaviors resulting from competition between triplet‐states (T n ‐S 0 self‐trapped excitons (STEs) inorganic units singlet‐state (S 1 organic cations, which manipulated by optical activity levels [SbCl ] 3− [InCl . The bonding differences /In − in terms electronic excitation hybridization emphasized, different electron‐transition mechanisms established according PL spectra at extreme temperature 5 305 K theoretical calculations. By fine‐tuning B‐site alloying, photoluminescence quantum yield (PLQY 81.5%) stability optimized 20% alloying This research sheds light on rules governing HMHs, well exploring optical‐functional application aviation sensors access‐control systems.

Language: Английский

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Structural phase transition drives outright photoluminescence quenching and dielectric duple bistable switching

Inorganic Chemistry Frontiers, Journal Year: 2024, Volume and Issue: 11(8), P. 2290 - 2299

Published: Jan. 1, 2024

(TECA)PbBr 3 and (TEBA)PbBr have a wide range of photoluminescence signals undergo coupling the structural phase transition quenching.

Language: Английский

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Multifunctional Applications Enabled by Tunable Multi-Emission and Ultra-Broadband VIS-NIR Luminescence via Energy Transfer in Sn²⁺/Mn²⁺-Doped Lead-Free Zn-Based Metal Halides

Materials Horizons, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

Metal halides are widely applied in solid-state lighting (SSL), optoelectronic devices, information encryption, and near-infrared (NIR) detection due to their superior photoelectric properties tunable emission. However, single-component phosphors that can be efficiently excited by light-emitting diode (LED) chips cover both the visible (VIS) NIR emission regions still very rare. To address this issue, (TPA)2ZnBr4:Sn2+/Mn2+ (TPA = [(CH3CH2CH2)4N]+) were synthesized using solvent evaporation method. The Sn2+ doping significantly enhances luminescence of (TPA)2ZnBr4, shifts weak blue light efficient emissions red zones. Spectroscopic studies density functional theory (DFT) calculations reveal attributed different levels 3P1-1S0 [SnBr4]2- tetrahedron caused Jahn-Teller distortion. More importantly, energy transfer from Mn2+ enables ultra-broadband VIS-NIR across 400-1000 nm range, with excitation-dependent characteristics. These suggest has great potential as a high-performance, luminescent material for applications general lighting, source, anti-counterfeiting labels.

Language: Английский

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Near-infrared luminescent materials: a review of their practical applications and prospective advancements

Dalton Transactions, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

This review covers NIR luminescent materials doped with RE, TM, and main-group ions, focusing on their optical properties, mechanisms, applications in bioimaging, LEDs, sensors, strategies to improve efficiency thermal stability.

Language: Английский

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Antimony doping towards fast digital encryption and decryption and high-efficiency WLED in zero-dimensional hybrid indium chlorides

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 494, P. 153060 - 153060

Published: June 12, 2024

Language: Английский

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One-Dimensional Indium(III) Halide Double Perovskites (CH₃NH₃)₂NaInX₆ (X = Cl, Br) and Their Antimony(III)-Induced High Photoluminescence

The Journal of Physical Chemistry C, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 6, 2025

Low-dimensional In(III) halide perovskites have become one of the most attractive classes light-emitting materials due to their tunable and high photoluminescence efficiency. However, synthesis is still a challenge. Here, we report two novel Na(I)–In(III) double perovskite-related compounds (MA)2NaInCl6 (MA)2NaInBr6 Sb3+-doped counterparts. Both crystallize in one-dimensional (1D) face-sharing chain structures with trigonal P3̅m1 symmetry. show wide direct band gaps 5.3 3.9 eV, respectively. While both are nonemissive pristine forms, 5% green (555 nm) yellow (585 emission quantum yields 13.8 53.6%, For (MA)2NaInBr6, PLQY 67.64% was achieved 1% Sb doping. Variable-temperature PL studies density functional theory calculations indicate that Sb3+ ion introduces self-trapped excitonic (STE) states, which responsible for high-efficiency emission. Our findings significantly expand scope low-dimensional photoluminescent In(III)-based metal perovskites.

Language: Английский

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Halogen Engineering and Solvent-Induced Strategies Regulate Structural Transitions and Luminescence Switching of Hybrid Copper(I) Halides

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

Published: Jan. 24, 2025

Copper-based halides have attracted significant attention due to their unique photophysical properties and diverse coordination configurations. However, enhancing water stability modulating structural transitions in cuprous halide materials remain challenging. In this work, we successfully synthesized three copper(I) halides, (C24H28P)CuBr2 (L1, [C24H28P]+ = hexyltriphenylphosphonium), (C24H28P)2Cu4Br6 (L2), (C24H28P)2Cu4I6 (L3), via solvent volatilization, demonstrating exceptional even after 27 days of submersion. Crystals L1 L2 emit yellow orange light, respectively, under ultraviolet excitation, while L3 emits green light when excited by blue light. A rapid phase transition between occurs stimulated with methanol at room temperature. Further exposure a NaI solution can result substitution Br– ions I– [Cu4Br6]2– form L3. Multimodal anticounterfeiting luminescent labels high-security levels been manufactured based on sequential → transition. Moreover, test paper designed be applied for low-level detection. This work accomplishes the coregulation transformations luminescence switching combining simulations halogen strategies, which not only deepens understanding structure–property relationships but also broadens optical applications these materials.

Language: Английский

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Near-unity room-temperature phosphorescence quantum yield induced by halogen–halogen interaction in chiral hybrid copper(i) iodide clusters

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

Published: Jan. 1, 2025

In this study, two pairs of 0D chiral copper iodide clusters were synthesized. The structural rigidity is increased by halogen modulation to obtain a near unity PLQY. applications in white LED and X-ray imaging are extremely promising.

Language: Английский

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Enhancing Optical Properties of Zn‐Mn Solid Solution Hybrid Halides for Wide Color Gamut Backlight Displays

Small, Journal Year: 2024, Volume and Issue: unknown

Published: Sept. 18, 2024

Abstract Hybrid metal halides display a range of optical properties and hold promise for various applications such as solid‐state lighting, anti‐counterfeiting measures, backlight displays, X‐ray detection. The incorporation zinc into (C 13 H 26 N) 2 MnBr 4 aims to enhance its structural rigidity improve narrow band green light emission properties. resulting ZnBr compound exhibits an identical crystal structure , indicating the potential solid solution varying Zn Mn ratios within this framework. 0.2 0.8 Br significantly enhanced properties, including photoluminescence quantum yield 92%, minimum full width at half maximum 43 nm, 85% retention room temperature 420 K. Additionally, crystals ZnCl 7 18 ZnX (X = Br, I) are synthesized, with displaying luminescent color changes dependent on excitation. demonstrates reversible phase transitions alterations in A white light‐emitting diode utilizing commercial phosphors exhibited gamut 112.2% National Television Standards Committee 1931 Standard. This investigation introduces stable highly efficient narrow‐band phosphor suitable displays.

Language: Английский

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Embedding Te(IV) into a Robust Sn(IV)-Based Metal Halide for Deep-Red Emission

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

Published: Feb. 14, 2025

Organic-inorganic hybrid Sn(IV)-based metal halides have received wide attention due to their excellent structural stability. However, realizing red-emitting with high stability and efficient photoluminescence (PL) efficiency remains challenging. Here, a stable organic-inorganic halide (C8H10O2N)2SnCl6 zero-dimensional (0D) structure has been obtained, which, however, displays poor PL properties the inert expression of Sn4+-4d10 electrons intrinsic indirect band gap feature. To address above challenges, Te4+ an active 5s2 lone pair is embedded into lattice (C8H10O2N)2SnCl6, as result, 5%Te4+-doped direct exhibits broadband deep-red emission (∼688 nm) (∼53%). Experimental calculated results reveal that embedding can effectively regulate facilitate transformation from structure, thereby leading radiative recombination. Benefiting merits, high-efficiency white light-emitting diode (WLED) fabricated using Te4+-doped ultrahigh color rendering index (CRI) up 94.5, suggesting great potential this material for solid-state lighting. This work provides significant insight design highly phosphors halides.

Language: Английский

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