Photophysical studies for Cu(i)-based halides: broad excitation bands and highly efficient single-component warm white-light-emitting diodes

Chemical Science, Journal Year: 2023, Volume and Issue: 14(20), P. 5415 - 5424

Published: Jan. 1, 2023

Designing and synthesizing cuprous halide phosphors unifying efficient low-energy emission a broad excitation band is still great challenge. Herein, by rational component design, three novel Cu(i)-based metal halides, DPCu4X6 [DP = (C6H10N2)4(H2PO2)6; X Cl, Br, I], were synthesized reacting p-phenylenediamine with (CuX), they show similar structures, consisting of isolated [Cu4X6]2- units separated organic layers. Photophysical studies uncover that the highly localized excitons rigid environment give rise to yellow-orange photoluminescence in all compounds spanning from 240 450 nm. The bright PL (X Br) originates self-trapped due strong electron-phonon coupling. Intriguingly, DPCu4I6 features dual-band emissive characteristic, attributed synergistic effect halide/metal-to-ligand charge-transfer (X/MLCT) triplet cluster-centered (3CC) excited states. Benefiting broadband excitation, high-performance white-light emitting diode (WLED) high color rendering index 85.1 was achieved using single-component phosphor. This work not only unveils role halogens photophysical processes but also provides new design principles for WLEDs.

Language: Английский

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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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Sb³⁺-Doped Indium-Based Metal Halide (Gua)₃InCl₆ with Efficient Yellow Emission

ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: 16(3), P. 3841 - 3852

Published: Jan. 11, 2024

In recent years, low-dimensional organic–inorganic hybrid metal halides (OIHMHs) have shown excellent photophysical properties due to their quantum structure, adjustable energy levels, and transfer between inorganic organic components, which attracted extensive attention from researchers. Herein, we synthesize a zero-dimensional (0D) OIHMH, Sb3+:(Gua)3InCl6, by introducing Sb3+ into (Gua)3InCl6, undergoes significant enhancement of the emission peak at 580 nm with photoluminescence yield (PLQY) boosted 17.86 95.72% when excited 340 nm. This boost in doped sample was studied combining ultrafast femtosecond transient absorption, temperature-dependent (PL) spectra, density functional theory (DFT) calculation, revealing process self-trapped exciton (STE) recombination emit light both Sb sites this 0D structure simultaneously. material lowest dark STE level site for undoped can amazingly very strong sample, has never been observed before. Finally, tested its application photoelectric device. work not only helps gain deeper understanding formation STEs In-based but also plays certain guiding role design new luminescent materials.

Language: Английский

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Stimuli‐Responsive Emission from Hybrid Metal Halides

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(17)

Published: Jan. 7, 2024

Abstract Stimuli‐responsive photoluminescent (PL) materials have attracted considerable attention in recent years owing to their potential applications anti‐counterfeiting, information encryption, and sensing. Further investigations of the transformation mechanism stimulus‐responsive PL are considerably important. In current study, an organic–inorganic metal halide, C 9 H 15 N 3 SbCl 5 ([C 13 ] 2+ is a 1‐(2‐pyridyl) piperazine cation) obtained, which exhibits 0D structure with P‐ 1 space group. At room temperature, when excited by UV light, single crystals exhibit unimodal blue light emission at 405 nm, grinding or hydrostatic pressure induces double‐peak emissions 650 nm. Interestingly, double‐emission samples can be restored single‐emission short annealing storage air for 2 weeks, this process reversible. Luminescence response mechanical stimuli also achieved presence hydrochloric acid water. Spectral analysis microstructural changes revealed that structural modifications inorganic group play pivotal role stimulus. Finally, composite film device based on prepared demonstrate these smart anti‐counterfeiting sensing applications.

Language: Английский

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Emerging 0D Hybrid Metal Halide Luminescent Glasses

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

Published: Jan. 2, 2025

0D hybrid metal halide (HMH) luminescent glasses have garnered significant attentions for its chemical diversity in optoelectronic applications and it also retains the skeleton connectivity coordination mode of crystalline counterparts while exhibiting various physics/chemistry characteristics distinct from states. However, understanding glass-forming ability specific structural origins underpinning properties HMH remains elusive. In this review, is started solid-liquid phase transition thermodynamic analysis HMHs formed through melt-quenching, summarize current compounds capable stably forming glassy phases via design. The characterization methods are further discussed highlight exceptional transparency, properties, glass crystallization behaviors. Moreover, application prospects demonstrated by these been presented accordingly X-ray detection imaging, anti-counterfeiting, information encryption. Finally, perspective offered into future development emerging family their applications.

Language: Английский

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Recent promise of lead-free halide perovskites in optoelectronic applications

Chemical Engineering Journal, Journal Year: 2022, Volume and Issue: 451, P. 138926 - 138926

Published: Sept. 1, 2022

Language: Английский

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Circularly Polarized Luminescence from Zero‐Dimensional Hybrid Lead‐Tin Bromide with Near‐Unity Photoluminescence Quantum Yield

Angewandte Chemie International Edition, Journal Year: 2022, Volume and Issue: 61(51)

Published: Oct. 21, 2022

Zero-dimensional (0D) hybrid metal halides with perfect host-guest structures are promising candidates to construct circularly polarized luminescence (CPL)-active materials. However, it still remains challenging obtain 0D chiral simultaneously strong CPL and high photoluminescence quantum yield. Here, a new enantiomeric pair of lead-tin bromides, (RR/SS-C6 N2 H16 )2 Pb0.968 Sn0.032 Br6 ⋅ 2H2 O (R/S-PbSnBr H2 O), is reported. The R/S-PbSnBr compounds not only show intriguing self-trapped exciton emissions near-unity yield, but also present intense dissymmetry factor glum ±3.0×10-3 . Such activities originate from the asymmetric [SnBr6 ]4- luminophores in O, due induced structural chirality by organic ligands via N-H⋅⋅⋅Br hydrogen bonds. Furthermore, tunable colors dehydrated reversibly observed, which extends their chiroptical applications.

Language: Английский

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Perovskite Smart Windows: The Light Manipulator in Energy‐Efficient Buildings

Advanced Materials, Journal Year: 2023, Volume and Issue: 36(17)

Published: July 30, 2023

Abstract Uncontrolled sunlight entering through windows contributes to substantial heating and cooling demands in buildings, which leads high energy consumption from the buildings. Recently, perovskite smart have emerged as innovative energy‐saving technologies, offering potential adaptively control indoor solar heat gain their impressive modulation capabilities. Moreover, harnessing high‐efficiency photovoltaic properties of materials, these generate power, thereby realizing more advanced with combined light harvesting This review summarizes recent advancements various chromic materials for achieving modulation, focusing on both structures underlying switching mechanisms. The discussion also encompasses device engineering strategies windows, including improvement optical transition performance, durability, combination electricity generation, evaluation performance building applications. Furthermore, challenges opportunities associated are explicated, aimed at stimulating academic research advancing pragmatic implementation efficiency sustainability.

Language: Английский

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Pseudo‐2D Layered Organic‐Inorganic Manganese Bromide with a Near‐Unity Photoluminescence Quantum Yield for White Light‐Emitting Diode and X‐Ray Scintillator

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(45)

Published: Sept. 25, 2023

Abstract Eco‐friendly lead‐free organic–inorganic manganese halides (OIMHs) have attracted considerable attention in various optoelectronic applications because of their superior optical properties and flexible solution processibility. Herein, we report a novel pseudo‐2D layered OIMH (MTP) 2 MnBr 4 (MTP: methyltriphenylphosphonium), which exhibits intense green emission under UV/blue or X‐ray excitation, with near‐unity photoluminescence quantum yield, high resistance to thermal quenching (I 150 °C =84.1 %) good photochemical stability. These features enable as an efficient phosphor for blue‐converted white light‐emitting diodes, demonstrating commercial‐level luminous efficiency 101 lm W −1 wide color gamut 116 % NTSC. Moreover, these crystals showcase outstanding scintillation properties, delivering light yield 67000 photon MeV , detection limit 82.4 nGy s competitive spatial resolution 6.2 lp mm imaging. This work presents new avenue the exploration eco‐friendly luminescent OIMHs towards multifunctional applications.

Language: Английский

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Machine Learning-Assisted Sensor Based on CsPbBr₃@ZnO Nanocrystals for Identifying Methanol in Mixed Environments

ACS Sensors, Journal Year: 2023, Volume and Issue: 8(3), P. 1252 - 1260

Published: March 10, 2023

Methanol is a respiratory biomarker for pulmonary diseases, including COVID-19, and common chemical that may harm people if they are accidentally exposed to it. It significant effectively identify methanol in complex environments, yet few sensors can do so. In this work, the strategy of coating perovskites with metal oxides proposed synthesize core–shell CsPbBr3@ZnO nanocrystals. The sensor displays response/recovery time 3.27/3.11 s 10 ppm at room temperature, detection limit 1 ppm. Using machine learning algorithms, from an unknown gas mixture 94% accuracy. Meanwhile, density functional theory used reveal formation process structure target identification mechanism. strong adsorption between CsPbBr3 ligand zinc acetylacetonate lays foundation structure. crystal structure, states, band were influenced by different gases, which results behaviors makes it possible mixed environments. Furthermore, due type II alignment, response performance further improved under UV light irradiation.

Language: Английский

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