A Facile Aqueous Solution Route for the Growth of Chalcogenide Perovskite BaZrS3 Films DOI Creative Commons

Samyak Dhole,

Xiucheng Wei,

Haolei Hui

и другие.

Photonics, Год журнала: 2023, Номер 10(4), С. 366 - 366

Опубликована: Март 25, 2023

The prototypical chalcogenide perovskite, BaZrS3 (BZS), with its direct bandgap of 1.7–1.8 eV, high chemical stability, and strong light–matter interactions, has garnered significant interest over the past few years. So far, attempts to grow films have been limited mainly physical vapor deposition techniques. Here, we report fabrication BZS thin via a facile aqueous solution route polymer-assisted (PAD), where polymer-chelated cation precursor were sulfurized in mixed CS2 Ar atmosphere. formation single-phase polycrystalline film at processing temperature 900 °C was confirmed by X-ray diffraction Raman spectroscopy. stoichiometry verified Rutherford Backscattering spectrometry energy-dispersive showed photoluminescence peak around 1.8 eV exhibited photogenerated current under light illumination wavelength 530 nm. Temperature-dependent resistivity analysis revealed that conduction dark condition could be described Efros–Shklovskii variable range hopping model 60–300 K, an activation energy about 44 meV.

Язык: Английский

Ligand Chemistry of Inorganic Lead Halide Perovskite Nanocrystals DOI Creative Commons

Nadesh Fiuza‐Maneiro,

Kun Sun, Iago López‐Fernández

и другие.

ACS Energy Letters, Год журнала: 2023, Номер 8(2), С. 1152 - 1191

Опубликована: Янв. 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.

Язык: Английский

Процитировано

182
Charge Transfer from Quantum-Confined 0D, 1D, and 2D Nanocrystals DOI Creative Commons
Qiuyang Li, Kaifeng Wu, Haiming Zhu

и другие.

Chemical Reviews, Год журнала: 2024, Номер 124(9), С. 5695 - 5763

Опубликована: Апрель 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.

Язык: Английский

Процитировано

26
Engineering Metal Halide Perovskite Nanocrystals with BODIPY Dyes for Photosensitization and Photocatalytic Applications DOI Creative Commons
Alejandro Cortés‐Villena, Delia Bellezza, Carla Cunha

и другие.

Journal of the American Chemical Society, Год журнала: 2024, Номер 146(21), С. 14479 - 14492

Опубликована: Апрель 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

Язык: Английский

Процитировано

22
Quantifying Förster Resonance Energy Transfer from Single Perovskite Quantum Dots to Organic Dyes DOI Creative Commons
Leon G. Feld, Simon C. Boehme, Viktoriia Morad

и другие.

ACS Nano, Год журнала: 2024, Номер 18(14), С. 9997 - 10007

Опубликована: Март 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.

Язык: Английский

Процитировано

13
Extending Infrared Emission via Energy Transfer in a CsPbI3–Cyanine Dye Hybrid DOI
Jishnudas Chakkamalayath, L. Martin, Prashant V. Kamat

и другие.

The Journal of Physical Chemistry Letters, Год журнала: 2024, Номер 15(2), С. 401 - 407

Опубликована: Янв. 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.

Язык: Английский

Процитировано

10
Emerging Opportunities of Colloidal Quantum Dots for Photocatalytic Organic Transformations DOI Creative Commons

Qinxuan Cao,

Jianning Feng,

Kin Ting Chang

и другие.

Advanced Materials, Год журнала: 2024, Номер unknown

Опубликована: Сен. 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.

Язык: Английский

Процитировано

10
Antimony‐Based Halide Perovskite Nanoparticles as Lead‐Free Photocatalysts for Controlled Radical Polymerization DOI
Yifan Zhu, Jiahui Zhang

Macromolecular Rapid Communications, Год журнала: 2024, Номер 45(9)

Опубликована: Фев. 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.

Язык: Английский

Процитировано

7
Recent progress of metal halide perovskite materials in heterogeneous photocatalytic organic reactions DOI

Chunpei Yan,

Yan Qian,

Zhaohong Liao

и другие.

Photochemical & Photobiological Sciences, Год журнала: 2024, Номер 23(7), С. 1393 - 1415

Опубликована: Июнь 8, 2024

Язык: Английский

Процитировано

7
Amplifying dual-visible-light photoswitching in aqueous media via confinement promoted triplet–triplet energy transfer DOI Creative Commons
Wenhui Wang, Weixin Yang, Zhiwei Zhang

и другие.

Chemical Science, Год журнала: 2024, Номер 15(15), С. 5539 - 5547

Опубликована: Янв. 1, 2024

Integration of diarylethenes and auxiliary triplet-sensitizers within a nano-confinement micelle ensures superior visible-light photochromism in the aqueous phase.

Язык: Английский

Процитировано

6
A Sensitizer of Purpose: Generating Triplet Excitons with Semiconductor Nanocrystals DOI Creative Commons
Rachel Weiss, Zachary A. VanOrman, Colette M. Sullivan

и другие.

ACS Materials Au, Год журнала: 2022, Номер 2(6), С. 641 - 654

Опубликована: Авг. 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.

Язык: Английский

Процитировано

27