Structural effects of the Pb2+ 6s2 lone pair activity: Eccentricity

Coordination Chemistry Reviews, Год журнала: 2025, Номер 529, С. 216434 - 216434

Опубликована: Янв. 22, 2025

Язык: Английский

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2D Molecular Crystals for Electronic and Optoelectronic Devices: Status and Challenges

Advanced Materials, Год журнала: 2025, Номер unknown

Опубликована: Янв. 31, 2025

2D molecular crystals (2D MCs) are an emerging family of materials formed by organic or inorganic molecules held together entirely weak intermolecular forces. MCs gaining attention in electronics and optoelectronics due to their structural diversity, scalability, strong light-matter interactions. This review provides a comprehensive overview potential electronic optoelectronic applications. It begins highlighting the features properties key discovered date, focusing on three strategies manipulate forces for better control over crystal morphology properties. Then various methods explored fabricating large-area, highly-oriented MCs, with emphasis vapor-phase liquid-phase techniques. Last, applications reviewed devices, such as channel materials, photosensitive components, dielectrics. is concluded discussing future challenges opportunities field, offering insights into scalable production industrial MCs.

Язык: Английский

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Origin of Pressure-Induced Nonlinear Optical Property Enhancement in CsGeCl₃ Perovskite: [GeCl₆] Octahedron Distortion and Band Gap Closing

Journal of the American Chemical Society, Год журнала: 2025, Номер unknown

Опубликована: Фев. 12, 2025

Second-harmonic generation (SHG) is the wave–wave nonlinear interaction in doubling wave frequencies, spanning from optics, radio, magnetohydrodynamics, and even middle atmosphere, enhancing SHG efficiency has attracted broad interest both fundamental mechanisms industrial applications. Laser characterized by a second-order susceptibility tensor optical (NLO) crystals, its intensity largely related to lattice distortion. Halide perovskites demonstrate unique photovoltaic optoelectronic properties due their high tunability crystalline electronic structures, which provides great platform investigate NLO properties. Here, we report pressure-driven enhancement all-inorganic lead-free compound CsGeCl3, exhibits considerable with 9.1 times (@ 1030 nm) that of KH2PO4 at ambient pressure. Upon compression 1.07 GPa, further gains ∼3 times, setting record-high under pressure (HP). Concerning limitations traditional powder measurements, developed new single-crystal angle-resolved polarization strategy retrieve intrinsic tensors HP, confirming pressure-induced enhancement. In situ HP synchrotron X-ray diffraction Raman scattering reveal strong correlation between [GeCl6] octahedral Optical absorption measurements show significant band gap closing compression, favoring First-principles calculations corroborate these findings. Our results offer tunable clean enhance halide establish reliable approach for probing pressure-dependent mechanism general.

Язык: Английский

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Low Compressibility of Photoelectric Properties in Layered Molecular Non-Metal Halide AsI3

Journal of Materials Chemistry A, Год журнала: 2025, Номер unknown

Опубликована: Янв. 1, 2025

Compared to other layered iodides such as SbI 3 , PbI 2 and RhI AsI exhibits lower compressibility in its photocurrent response, despite the bandgap undergoing a successive decrease under high pressure.

Язык: Английский

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Pressure‐Induced Conformation Transition and Chiral Inversion Toward Enhanced Bright White Light From 1D Chiral Perovskite

Advanced Optical Materials, Год журнала: 2025, Номер unknown

Опубликована: Фев. 27, 2025

Abstract The introduction of chiral molecules can impart chirality to low‐dimensional perovskite, thereby enhancing its potential in sensing and information storage applications. Nevertheless, the limited photoluminescence efficiency greatly restricts broader utility. Here, a very bright white light is achieved from pressure‐induced emission (PIE) 1D OIHPs S‐C 6 H 5 CH(CH 3 )NH PbBr (S‐MPAPbBr ) crystal, which exhibited 24.6‐fold increase intensity. circular dichroism (CD) spectrum simultaneous inversion enhancement, establishing it as multifunctional material PIE luminogens (PIEgens). Furthermore, upon releasing pressure ambient conditions, be stabilized with Commission Internationale de l’Éclair‐age (CIE) chromaticity coordinates (0.30, 0.29) correlated color temperature (CCT) 7998 K. In situ high‐pressure experiments first‐principles calculations indicated that irreversible structural amorphization associated steric hindrance effect responsible for retention cold‐white light. conformation transition S‐MPA + cations induced twisting [PbBr ] − ∞ chains, thus improving PL modulating CD signal. research elucidates fundamental structure‐property relationship offers application solid‐state lighting single‐component well regulation.

Язык: Английский

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Fluorine-Induced Anomalous Optical Stability and Pressure-Enhanced Emission Property of 0D Lead Perovskite Derivatives

Chemistry of Materials, Год журнала: 2025, Номер unknown

Опубликована: Март 16, 2025

Язык: Английский

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Lone Pairs-Mediated Multiple Through-Space Interactions for Efficient Room-Temperature Phosphorescence

Journal of the American Chemical Society, Год журнала: 2025, Номер unknown

Опубликована: Март 18, 2025

The simultaneous generation and stabilization of triplet excitons are the key to realizing efficient organic room temperature phosphorescence (RTP), which is challenging owing obscure mechanism structure-property relationships. Herein, a strategy lone-pair-mediated multiple through-space interactions (TSIs) proposed availably induce RTP. By incorporating heteroatoms facilitate n-n n-π interactions, lone pairs delocalized throughout structure, resulting in dense splitting excited-state energy levels. Thus, more matched levels with small gap between singlet states (ΔEST) emerge, intersystem crossing (ISC) transition channels that assist generation. strong TSIs also effectively rigidify molecular structures thus stabilize for radiation. Furthermore, manipulation TSI intensity allows efficiency enhancement, persistent time prolongation, tolerance high temperatures This work not only explores fundamental principle RTP from new view but provides universal ISC promotion triple stabilization.

Язык: Английский

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Unprecedented [Hg3Se2]2- cluster drives giant optical anisotropy and broad infrared transparency

Research Square (Research Square), Год журнала: 2025, Номер unknown

Опубликована: Апрель 3, 2025

Optical anisotropy, as the core physical property for polarization manipulation, has always posed a significant challenge in design of functional optical materials regarding its regulation mechanism and performance optimization. In mid-far infrared (IR) region, that possess both large birefringence wide transparent range are extremely scarce. this study, we synthesized Hg₉Ga₄Se₄Cl₁₆ (HGSC), tridymite-like topological structure incorporating well-aligned linear [Hg₃Se₂] units. HGSC exhibits an exceptional 0.808 at 546 nm, which is 67 times higher than commercial MgF₂, while also possessing broadest transparency window among Hg-based chalcogenide single crystals (0.4 to 25 µm). Theoretical calculations reveal originates from clusters, exhibit highest anisotropy (𝛿 = 430) all known birefringence-active This study presents new bifunctional unit combine IR birefringence. Furthermore, first selenide feature [Hg₃]²⁺ atomic multinuclear compounds offer potential applications thermoelectric, magnetism, low-temperature superconductivity.

Язык: Английский

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High-pressure research on optoelectronic materials: Insights from in situ characterization methods

Matter and Radiation at Extremes, Год журнала: 2025, Номер 10(3)

Опубликована: Апрель 28, 2025

High-pressure research has emerged as a pivotal approach for advancing our understanding and development of optoelectronic materials, which are vital wide range applications, including photovoltaics, light-emitting devices, photodetectors. This review highlights various in situ characterization methods employed high-pressure to investigate the optical, electronic, structural properties materials. We explore advances that have been made techniques such X-ray diffraction, absorption spectroscopy, nonlinear optics, photoluminescence Raman photoresponse measurement, emphasizing how these enhanced elucidation transitions, bandgap modulation, performance optimization, carrier dynamics engineering. These insights underscore role optimizing tailoring materials future applications.

Язык: Английский

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[K₂PbI][Ga₇Se₁₂]: A New Lead-Containing Nonlinear Optical Material with Moderate Second-Harmonic Generation Response and Large Birefringence

Crystal Growth & Design, Год журнала: 2025, Номер unknown

Опубликована: Май 21, 2025

Язык: Английский

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