Colloidal Quantum Dots as Platforms for Quantum Information Science

Chemical Reviews, Journal Year: 2020, Volume and Issue: 121(5), P. 3186 - 3233

Published: Dec. 29, 2020

Colloidal quantum dots (QDs) are nanoscale semiconductor crystals with surface ligands that enable their dispersion in solvents. Quantum confinement effects facilitate wave function engineering to sculpt the spatial distribution of charge and spin states thus energy dynamics QD optical transitions. QDs can be integrated devices using solution-based assembly methods position single create ordered arrays. Here, we describe synthesis, assembly, photophysical properties colloidal have captured scientific imagination been harnessed applications. We focus especially on current understanding coherent opportunities exploit as platforms for information science. Freedom design isolate control mechanical charge, spin, light presents various approaches systems robust, addressable states. consider attributes optically qubits emerging computation, sensing, simulation, communication technologies, e.g., robust sources indistinguishable, photons into photonic structures amplify, direct, tune emission or hosts isolated, coupled other spins

Language: Английский

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An Overview for Zero‐Dimensional Broadband Emissive Metal‐Halide Single Crystals

Advanced Optical Materials, Journal Year: 2021, Volume and Issue: 9(17)

Published: May 31, 2021

Abstract The high‐profile candidacy of low‐dimensional metal‐halide single crystals as promising light emitters originates from the intriguing emission properties (e.g., extremely broad luminescence spectra, large Stokes shift, high color rendition), which have enabled recent great achievements on their application in lighting, artificial illumination, and scintillators. Among family crystals, zero‐dimensional (0D) materials been featured lowest dimensionality, a consequence, strongest quantum confinement, softest lattice, electron–phonon coupling further translated into near‐unity photoluminescence (PL) efficiency with broadband emission. However, far it is known, 0D structures are significantly underexplored. Herein, an overview provided advances focus comprehensive understanding insightful perspectives behind photophysical mechanism. Additionally, challenges future opportunities currently faced by bulk metal halides discussed order to provide roadmap for development novel versatile optical suited practical applications.

Language: Английский

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Stabilization of Perovskite Solar Cells: Recent Developments and Future Perspectives

Advanced Materials, Journal Year: 2022, Volume and Issue: 34(50)

Published: Sept. 14, 2022

Exceptional power conversion efficiency (PCE) of 25.7% in perovskite solar cells (PSCs) has been achieved, which is comparable with their traditional rivals (Si-based cells). However, commercialization-worthy and long-term stability remain a challenge. In this regard, there are increasing studies focusing on the interface engineering PSC devices to overcome poor technical readiness. Herein, roles electrode materials interfaces PSCs discussed terms PCEs stability. All current knowledge factors responsible for rapid intrinsic external degradation presented. Then, carbonaceous as substitutes noble metals focused on, along recent research progress carbon-based PSCs. Furthermore, sub-category PSCs, that is, flexible considered type exceptional source due high power-to-weight ratios figures merit next-generation wearable electronics. Last, future perspectives directions discussed, an emphasis commercialization.

Language: Английский

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Recent Advances in Synthesis, Properties, and Applications of Metal Halide Perovskite Nanocrystals/Polymer Nanocomposites

Advanced Materials, Journal Year: 2021, Volume and Issue: 33(50)

Published: June 6, 2021

Metal halide perovskite nanocrystals (PNCs) have recently garnered tremendous research interest due to their unique optoelectronic properties and promising applications in photovoltaics optoelectronics. PNCs can be combined with polymers create nanocomposites that carry an array of advantageous characteristics. The polymer matrix bestow stability, stretchability, solution-processability while the maintain size-, shape- composition-dependent properties. As such, these possess great promise for next-generation displays, lighting, sensing, biomedical technologies, energy conversion. recent advances metal PNC/polymer are summarized here. First, a variety synthetic strategies crafting discussed. Second, intriguing is examined. Third, broad range highlighted, including light-emitting diodes (LEDs), lasers, scintillators. Finally, outlook on future directions challenges this rapidly evolving field presented.

Language: Английский

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Doping Lanthanide Ions in Colloidal Semiconductor Nanocrystals for Brighter Photoluminescence

Chemical Reviews, Journal Year: 2020, Volume and Issue: 121(3), P. 1425 - 1462

Published: Dec. 18, 2020

The spectrally narrow, long-lived luminescence of lanthanide ions makes optical nanomaterials based on these elements uniquely attractive from both a fundamental and applicative standpoint. A highly coveted class such is represented by colloidal lanthanide-doped semiconductor nanocrystals (LnSNCs). Therein, upon proper design, the poor light absorption intrinsically featured lanthanides compensated moiety, which harvests energy funnel it to luminescent metal center. Although great deal experimental effort has been invested produce efficient that sort, relatively modest results have obtained thus far. As late, halide perovskite surged as materials choice for doping lanthanides, but they non-negligible shortcomings in terms chemical stability, toxicity, range. limited gamut currently available LnSNCs unfortunate, given tremendous technological impact could fields like biomedicine optoelectronics. In this review, we provide an overview field LnSNCs, while distilling lessons learnt material design. result compendium key aspects consider when devising synthesizing nanomaterials, with keen eye foreseeable scenarios where are poised become front runners.

Language: Английский

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Rational Design of Metal Halide Perovskite Nanocrystals for Photocatalytic CO₂ Reduction: Recent Advances, Challenges, and Prospects

ACS Energy Letters, Journal Year: 2022, Volume and Issue: 7(6), P. 2043 - 2059

Published: May 23, 2022

Metal halide perovskite nanocrystals (MHP NCs) have attracted much scientific interest in photocatalysis. Various types of MHP photocatalysts been intensively explored photocatalytic CO2 reduction the past few years. However, some key issues, such as severe charge recombination, low stability, and origin products, created bottlenecks developing photocatalysts. Therefore, rational design MHPs is worthwhile to deepen our understanding above issues develop efficient This Focus Review highlights recent advances regarding principles toward reduction. modification strategies are clarified, an outlook on future challenges prospects also provided point out possible research directions It anticipated that this can provide guidance MHP-based help uncover common encountered by community when studying

Language: Английский

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Lead‐Free Halide Double Perovskite Nanocrystals for Light‐Emitting Applications: Strategies for Boosting Efficiency and Stability

Advanced Science, Journal Year: 2021, Volume and Issue: 8(7)

Published: March 3, 2021

Abstract Lead‐free halide double perovskite (HDP) nanocrystals are considered as one of the most promising alternatives to lead due their unique characteristics nontoxicity, robust intrinsic thermodynamic stability, rich and tunable optoelectronic properties. Although lead‐free HDP variants with highly efficient emission synthesized characterized, photoluminescent (PL) properties colloidal still have enormous challenges for application in light‐emitting diode (LED) devices surface defects, indirect band, disallowable optical transitions. Herein, recent progress on synthetic strategies, ligands passivation, metal doping/alloying boosting efficiency stability is comprehensive summarized. It begins by introducing crystalline structure, electronic PL mechanism HDPs. Next, limiting factors origins instability analyzed, followed highlighting effects synthesis Then, preliminary applications LED emphasized. Finally, prospects concerning development stable nanocrystals‐based future proposed.

Language: Английский

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Photon management to reduce energy loss in perovskite solar cells

Chemical Society Reviews, Journal Year: 2021, Volume and Issue: 50(12), P. 7250 - 7329

Published: Jan. 1, 2021

We systematically and hierarchically reviewed all of the photon management strategies to overcome energy loss in perovskite solar cells hope guide researchers achieve efficient light-harvesting semiconductor optoelectronic devices.

Language: Английский

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Boosting the Self‐Trapped Exciton Emission in Alloyed Cs₂(Ag/Na)InCl₆ Double Perovskite via Cu⁺ Doping

Advanced Science, Journal Year: 2022, Volume and Issue: 9(7)

Published: Jan. 17, 2022

Fundamental understanding of the effect doping on optical properties 3D double perovskites (DPs) especially dynamics self-trapped excitons (STEs) is vital importance for their optoelectronic applications. Herein, a unique strategy via Cu+ to achieve efficient STE emission in alloyed lead-free Cs2 (Ag/Na)InCl6 DPs reported. A small amount (1.0 mol%) results boosted crystals, with photoluminescence (PL) quantum yield increasing from 19.0% 62.6% and excitation band shifting 310 365 nm. Temperature-dependent PL femtosecond transient absorption spectroscopies reveal that remarkable enhancement originates increased radiative recombination rate density STEs, as result symmetry breakdown wavefunction at octahedral Ag+ site. These findings provide deep insights into -doped , thereby laying foundation future design new emission.

Language: Английский

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Halide Perovskite Materials for Photo(Electro)Chemical Applications: Dimensionality, Heterojunction, and Performance

Advanced Energy Materials, Journal Year: 2021, Volume and Issue: 12(4)

Published: May 5, 2021

Abstract In recent years, halide perovskite materials have sparked intensive research, including their burgeoning development in the field of photo(electro)chemical catalysis. Halide are based on abundant and low‐cost elements with a rich structural composition variety molecular morphological dimensionalities. They possess versatile advantages over other photo(electro)catalytic owing to facile adjustment electronic properties via compositional engineering. Thus, rapid photo(electro)catalysts past 4–5 years has opened up new opportunities for diverse applications, ranging from photocatalytic organic reactions (e.g., chemical transformations, photopolymerization, degradation) solar‐to‐chemical fuel conversion water splitting CO 2 reduction). This review aims provide an up‐to‐date discussion applications materials, emphasizing crystal dimensionality, synthetic methodologies, heterojunction structures, fundamental structure‐activity relationships. Furthermore, current challenges future research directions rational design boost overall catalytic performance stability identified envisaged respectively.

Language: Английский

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