Nanoscale, Journal Year: 2023, Volume and Issue: 15(10), P. 4962 - 4971
Published: Jan. 1, 2023
Halide perovskite nanocrystals (PNCs) have been embedded in polymeric ionic liquid phases that stabilise them and the composite materials applied as photocatalysts for dye degradation.
Language: Английский
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
Citations
176
Chemical Reviews, Journal Year: 2024, Volume and Issue: 124(9), P. 5695 - 5763
Published: April 17, 2024
The properties of colloidal quantum-confined semiconductor nanocrystals (NCs), including zero-dimensional (0D) quantum dots, 1D nanorods, 2D nanoplatelets, and their heterostructures, can be tuned through size, dimensionality, material composition. In photovoltaic photocatalytic applications, a key step is to generate spatially separated long-lived electrons holes by interfacial charge transfer. These transfer have been extensively studied recently, which the subject this Review. Review starts with summary electronic structure optical 0D-2D nanocrystals, followed advances in wave function engineering, novel way control spatial distribution holes, dimension, It discusses dependence NC on various parameters development Auger-assisted model. Recent understanding multiple exciton generation, decay, dissociation are also discussed, an emphasis carrier Finally, applications nanocrystal-based systems for photocatalysis reviewed, focusing photodriven separation recombination processes that dictate performance these materials. ends outlook remaining challenges promising future directions field.
Language: Английский
Citations
26
Journal of the American Chemical Society, Journal Year: 2024, Volume and Issue: 146(21), P. 14479 - 14492
Published: April 4, 2024
The sensitization of surface-anchored organic dyes on semiconductor nanocrystals through energy transfer mechanisms has received increasing attention owing to their potential applications in photodynamic therapy, photocatalysis, and photon upconversion. Here, we investigate the visible-light excitation two nanohybrids based CsPbBr
Language: Английский
Citations
22
ACS Nano, Journal Year: 2024, Volume and Issue: 18(14), P. 9997 - 10007
Published: March 28, 2024
Colloidal quantum dots (QDs) are promising regenerable photoredox catalysts offering broadly tunable redox potentials along with high absorption coefficients. QDs have thus far been examined for various organic transformations, water splitting, and CO2 reduction. Vast opportunities emerge from coupling other homogeneous catalysts, such as transition metal complexes or dyes, into hybrid nanoassemblies exploiting energy transfer (ET), leveraging a large cross-section of long-lived triplet states cocatalysts. However, thorough understanding further engineering the complex operational mechanisms require simultaneously controlling surface chemistry probing dynamics at sufficient spatiotemporal resolution. Here, we probe ET single lead halide perovskite QDs, capped by alkylphospholipid ligands, to dye molecules employing single-particle photoluminescence spectroscopy single-photon We identify Förster-type spatial, temporal, photon–photon correlations in QD emission. Discrete quenching steps acceptor emission reveal stochastic photobleaching events individual allowing precise quantification efficiency, which is >70% QD–dye strong donor–acceptor spectral overlap. Our work explores processes occurring QD/molecule interface demonstrates feasibility sensitizing photocatalysts QDs.
Language: Английский
Citations
13
The Journal of Physical Chemistry Letters, Journal Year: 2024, Volume and Issue: 15(2), P. 401 - 407
Published: Jan. 4, 2024
Directing energy flow in light harvesting assemblies of nanocrystal–chromophore hybrid systems requires a better understanding factors that dictate excited-state processes. In this study, we explore interactions within the CsPbI3–cyanine dye (IR125) assembly through comprehensive set steady-state and time-resolved absorption photoluminescence (PL) experiments. Our investigations reveal quenching CsPbI3 emission alongside simultaneous enhancement IR125 fluorescence, providing evidence for singlet transfer. The evaluation both PL decay measurements yield ∼94% transfer efficiency CsPbI3–IR125 assembly. Transient spectroscopy further unveils process operates on an ultrafast time scale, occurring 400 ps with rate constant 1.4 × 1010 s–1. findings highlight potential to extend halide perovskites into infrared region, paving way display applications.
Language: Английский
Citations
10
Advanced Materials, Journal Year: 2024, Volume and Issue: unknown
Published: Sept. 28, 2024
Abstract Colloidal quantum dots (QDs) have emerged as a versatile photocatalyst for wide range of photocatalytic transformations owing to its high absorption coefficient, large surface‐to‐volume ratio, stability, and efficient charge energy transfer dynamics. The past decades witnessed rapid development QDs artificial photocatalysis. In this review, the unique characteristics are focused on, including size effect, compositional structural diversity, tunable surface chemistry, photophysics, that can be utilized transformations. recent advancements in organic enabled by photocatalysts summarized. opportunities highlighted tackle reactions previously unattainable with small molecule photocatalysts. Lastly, an outlook is provided future directions field.
Language: Английский
Citations
9
Macromolecular Rapid Communications, Journal Year: 2024, Volume and Issue: 45(9)
Published: Feb. 13, 2024
Abstract Metal halide perovskites have emerged as versatile photocatalysts to convert solar energy for chemical processes. Perovskite photocatalyzed polymerization draws special attention due its straightforward synthesis process and the ability create advanced perovskite‐polymer nanocomposites. Herein, this work employs Cs 3 Sb 2 Br 9 perovskite nanoparticles (NPs) a lead‐free photocatalyst light‐controlled atom transfer radical (ATRP). NPs exhibit high reduction potential interact with electronegative bromide initiator Lewis acid sites, enabling efficient photoinduced of initiators controlled under blue light irradiation. Methacrylate monomers various functional groups are successfully polymerized, resulting polymer showcased dispersity ( Đ ) small 1.27. The living nature is confirmed by chain end fidelity kinetic studies. Moreover, serve heterogeneous photocatalysts, demonstrating recyclability reusability up four cycles. This presents promising approach overcome limitations lead‐based in polymerization, offering sustainable alternative well‐defined polymeric materials.
Language: Английский
Citations
7
Chemical Science, Journal Year: 2024, Volume and Issue: 15(15), P. 5539 - 5547
Published: Jan. 1, 2024
Integration of diarylethenes and auxiliary triplet-sensitizers within a nano-confinement micelle ensures superior visible-light photochromism in the aqueous phase.
Language: Английский
Citations
6
Photochemical & Photobiological Sciences, Journal Year: 2024, Volume and Issue: 23(7), P. 1393 - 1415
Published: June 8, 2024
Language: Английский
Citations
6
ACS Materials Au, Journal Year: 2022, Volume and Issue: 2(6), P. 641 - 654
Published: Aug. 7, 2022
The process of photon upconversion promises importance for many optoelectronic applications, as it can result in higher efficiencies and more effective management. Upconversion via triplet–triplet annihilation (TTA) occurs at low incident powers high efficiencies, requirements integration into existing devices. Semiconductor nanocrystals are a diverse class triplet sensitizers with advantages over traditional molecular such energetic tunability minimal energy loss during the sensitization process. In this Perspective, we review current progress semiconductor nanocrystal sensitization, specifically focusing on nanocrystal, ligand shell which surrounds solid-state sensitization. Finally, discuss potential areas improvement could efficient systems sensitized by nanocrystals. Specifically, focus development TTA systems, elucidation transfer mechanisms from to transmitter underpin propose novel configurations nanocrystal-sensitized systems.
Language: Английский
Citations
27