State of the Art and Prospects for Halide Perovskite Nanocrystals

ACS Nano, Journal Year: 2021, Volume and Issue: 15(7), P. 10775 - 10981

Published: June 17, 2021

Metal-halide perovskites have rapidly emerged as one of the most promising materials 21st century, with many exciting properties and great potential for a broad range applications, from photovoltaics to optoelectronics photocatalysis. The ease which metal-halide can be synthesized in form brightly luminescent colloidal nanocrystals, well their tunable intriguing optical electronic properties, has attracted researchers different disciplines science technology. In last few years, there been significant progress shape-controlled synthesis perovskite nanocrystals understanding applications. this comprehensive review, having expertise fields (chemistry, physics, device engineering) joined together provide state art overview future prospects nanocrystal research.

Language: Английский

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Frontiers in circularly polarized luminescence: molecular design, self-assembly, nanomaterials, and applications

Science China Chemistry, Journal Year: 2021, Volume and Issue: 64(12), P. 2060 - 2104

Published: Nov. 10, 2021

Language: Английский

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Ligand Chemistry of Inorganic Lead Halide Perovskite Nanocrystals

ACS Energy Letters, Journal Year: 2023, Volume and Issue: 8(2), P. 1152 - 1191

Published: Jan. 26, 2023

Lead halide perovskite nanocrystals (LHP NCs) have emerged as next-generation semiconductor materials with outstanding optical and optoelectronic properties. Because of the high surface-to-volume ratio, performance colloidal stability LHP NCs largely depend on their surface chemistry, especially ligands termination. On one hand, capping improve luminescence; other hand highly dynamic binding nature is detrimental to photoluminescence NCs. In addition, functionalization desired molecules induces new functionalities such chirality, light harvesting, triplet sensitization through energy/electron transfer or use X-ray detectors. this review, we present current understanding an atomic view chemistry NCs, including crystal termination, vacancies, different types ligands. Furthermore, discuss ligand-induced functionalities, photocatalysis chirality.

Language: Английский

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Circularly polarized luminescent self‐organized helical superstructures: From materials and stimulus‐responsiveness to applications

Aggregate, Journal Year: 2021, Volume and Issue: 2(6)

Published: Oct. 22, 2021

Abstract Circularly polarized luminescence (CPL) has gained considerable attention in various systems and rapidly developed into an emerging research field. To meet the needs of actual applications diverse fields, a high dissymmetry factor ( g lum ) tunable optical performance CPL would be most urgent pursuit for researchers. Accordingly, many materials strategies have been to address these critical issues. Emissive cholesteric liquid crystals (CLCs), that is, luminescent self‐organized helical superstructures, are considered ideal candidates constructing CPL‐active materials, as they not only exhibit values, but also enable flexible control CPL. This review mainly summarizes characteristics based on CLCs bulk phase doped with different emitters, including aggregated induced emission molecules, conventional organic small polymer metal–organic complex nanoparticles. In addition, recent significant progress stimulus‐responsive emissive terms several types stimuli, light, electricity, temperature, mechanical force, multiple stimuli is presented. Finally, short perspective opportunities challenges associated CLC field provided. anticipated offer new insights guidelines developing CLC‐based broader applications.

Language: Английский

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Circular Polarized Light Emission in Chiral Inorganic Nanomaterials

Advanced Materials, Journal Year: 2022, Volume and Issue: 35(34)

Published: Jan. 13, 2022

Chiral inorganic nanostructures strongly interact with photons changing their polarization state. The resulting circularly polarized light emission (CPLE) has cross-disciplinary importance for a variety of chemical/biological processes and is essential development chiral photonics. However, the effects are often complex interpretation dependent on several structural parameters nanostructure. CPLE in nanostructured media multiple origins optical typically convoluted into single output. Analyzing data obtained nanoclusters, nanoparticles, nanoassemblies, nanocomposites from metals, chalcogenides, perovskite, other nanostructures, it shown here that there distinct groups nanomaterials which dominated either by luminescence (CPL) or scattering (CPS); also many they comparable. following points demonstrated: 1) CPL CPS contributions involve light-matter interactions at different levels; 2) contribution especially strong microparticles, composites; 3) engineering materials requires synergistic implementation effects. These findings expected to guide technological fields, including 3D displays, information storage, biosensors, spintronics, biological probes.

Language: Английский

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Multimodal, Convertible, and Chiral Optical Films for Anti‐Counterfeiting Labels

Advanced Functional Materials, Journal Year: 2022, Volume and Issue: 32(33)

Published: June 2, 2022

Abstract Designing a sustainable security model that carries multilevel information with numerous optical states will significantly enhance anti‐counterfeiting abilities to deter counterfeits, ranging from artworks, currencies, and foods medicines, but is enormously challenging. Herein, ambient‐friendly, large‐area, quadruple‐level, chiral luminescent materials are prepared by incorporating lanthanide complexes wrapped in poly(ethylene glycol) matrix into nematic cellulose nanocrystal (CNC) films through co‐assembly strategy. Due the regulation of structures, composite enable full‐color structural colors tunable fluorescence. Notably, brightest fluorescent film radiates right‐handed circularly polarized luminescence an asymmetric factor over −0.36, lifetime up 510 µs, absolute quantum yield 66.7%. More interestingly, fascinating chiro‐optical behavior azure khaki can be controlled polarizing filter at given 0° 90° rotation angles. This system showcases comprehensive properties bright responsive photoluminescence, quadruple convertible color, flexible solvent‐resistant abilities. CNC‐derived photonic material act as multimodal label on banknote, which greatly facilitates its development for practical applications.

Language: Английский

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Polymer‐Based Circularly Polarized Luminescent Materials

Advanced Optical Materials, Journal Year: 2023, Volume and Issue: 11(6)

Published: Jan. 19, 2023

Abstract Chiral materials capable of generating circularly polarized luminescence (CPL) have gained rapidly growing research interest by virtue their peculiar photophysical characteristics and far‐reaching applications. Amongst various CPL materials, polymer‐based constituted an important class owing to abundant types, ease manufacture, high thermal stability, as well as, tunable properties. The present work reviews the latest advances in constructing which are classified based on interaction modes between chiral luminescent components, that is, covalent interaction, non‐covalent without interactions. newly emerging categories nonconventional fluorescence‐based room temperature phosphorescence, with thermally activated delayed fluorescence properties also presented. Typical applications emitters organic light‐emitting diodes, information security encryption, optical sensors further discussed. Additionally, current challenges future perspectives this field summarized. This review article is expected stimulate more unprecedented achievements derived from thus promoting practical

Language: Английский

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Amplified Circularly Polarized Electroluminescence Behavior Triggered by Helical Nanofibers from Chiral Co‐assembly Polymers

Angewandte Chemie International Edition, Journal Year: 2022, Volume and Issue: 61(23)

Published: March 23, 2022

Two chiral binaphthyl polymers (R/S-P1 and R/S-P2) with different dihedral angles of the moiety were chosen as inducers to construct co-assemblies an achiral pyrene-naphthalimide dye (NPy) then acted emitting layer (EML) circularly polarized electroluminescence (CP-EL) devices. The anchored angle R/S-P2 not only exhibited enhanced chirality signal, but also had a strong chirality-inducing effect on NPy in co-assembly (R/S-P2)0.6 -(NPy)0.4 . After annealing at 120 °C, CPL signal (|gem |) ordered helical nano-fibers was amplified 5.6×10-2 , which about 6-fold larger than that (R/S-P1)0.6 gem value due formation through π-π stacking interaction between NPy. This kind EML CP-OLEDs, achieved excellent CP-EL performance (|gEL |=4.8×10-2 ).

Language: Английский

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Rationalizing the design and implementation of chiral hybrid perovskites

Chem, Journal Year: 2022, Volume and Issue: 8(5), P. 1231 - 1253

Published: Feb. 16, 2022

Language: Английский

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Intense Circularly Polarized Fluorescence and Room-Temperature Phosphorescence in Carbon Dots/Chiral Helical Polymer Composite Films

ACS Nano, Journal Year: 2023, Volume and Issue: 17(7), P. 6912 - 6921

Published: March 31, 2023

Chiral carbon dots (C-dots) with a circularly polarized fluorescence (CPF) property have attracted tremendous attention due to their significant applications in chiral optoelectronics and theranostics. However, constructing room-temperature phosphorescent (CPRTP) C-dots remains great challenge. Herein, strategy is established achieve efficient CPF CPRTP emissions C-dots/chiral helical polymer bilayer composite film. Taking advantage of the filter effect polymer, intense large dissymmetric factors up 1.4 × 10-1 1.2 10-2 are respectively obtained, even though there only simple interface contact between layer layer. More importantly, white-color emission multiple information display encryption further realized based on prepared luminescent films.

Language: Английский

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