A5078904090- Quantum Dots Synthesis And Properties
- Chalcogenide Semiconductor Thin Films
- Perovskite Materials and Applications
- Gold and Silver Nanoparticles Synthesis and Applications
- 2D Materials and Applications
- Carbon and Quantum Dots Applications
- Solid-state spectroscopy and crystallography
- Nanocluster Synthesis and Applications
- Optical properties and cooling technologies in crystalline materials
- Semiconductor Quantum Structures and Devices
- Nanowire Synthesis and Applications
- Advanced Semiconductor Detectors and Materials
- Conducting polymers and applications
- Nonlinear Optical Materials Studies
- Luminescence Properties of Advanced Materials
- Luminescence and Fluorescent Materials
- Graphene research and applications
- Copper-based nanomaterials and applications
- Photonic Crystals and Applications
- Force Microscopy Techniques and Applications
- Organic Light-Emitting Diodes Research
- Plasmonic and Surface Plasmon Research
- Pickering emulsions and particle stabilization
- Spectroscopy and Quantum Chemical Studies
- Spectroscopy and Laser Applications
Jilin University
2023-2025
ITMO University
2015-2024
Jilin Medical University
2024
St. Petersburg College
2020
Ioffe Institute
2020
City University of Hong Kong
2020
Institute of Information Technologies
2018
Moscow Power Engineering Institute
2012-2014
St Petersburg University
2010-2012
In this review we present new concepts and recent progress in the application of semiconductor quantum dots (QD) as labels two important areas biology, bioimaging biosensing.
This review is focused on new concepts and recent progress in the development of three major quantum dot (QD) based optoelectronic devices: photovoltaic cells, photodetectors LEDs.
Abstract Controlling the transport and minimizing charge carrier trapping at interfaces is crucial for performance of various optoelectronic devices. Here, how electronic properties stable, abundant, easy‐to‐synthesized carbon dots (CDs) are controlled via surface chemistry through a chosen ratio their precursors citric acid ethylenediamine demonstrated. This allows to adjust work function indium tin oxide (ITO) films over broad range 1.57 eV, deposition thin CD layers. modifiers with...
Carbon dots (CDs) are light-emitting nanoparticles that show great promise for applications in biology and medicine due to the ease of fabrication, biocompatibility, attractive optical properties. Optical chirality, on other hand, is an intrinsic feature inherent many objects nature, it can play important role formation artificial complexes based CDs implemented enantiomer recognition, site-specific bonding, etc. We employed a one-step hydrothermal synthesis produce chiral from commonly used...
We report on an anomalous size dependence of the room-temperature photoluminescence decay time from lowest-energy state PbS quantum dots in colloidal solution, which was found using transient luminescence spectroscopy. The observed 10-fold reduction (from ~2.5 to 0.25 μs) with increase dots' diameter is explained by existence phonon-induced transitions between in-gap state-whose energy drastically depends diameter-and fundamental dots.
Chiral carbon dots have been produced <italic>via</italic> two synthetic approaches using <sc>l/d</sc>-cysteine resulting in improvement of emission quantum yield and realization two-photon absorption which are attractive features for bio applications.
Abstract Metal halide perovskite‐based optoelectronics has experienced an unprecedented development in the last decade, while further improvements of efficiency, stability, and economic gains such devices require novel engineering concepts. The use carbon nanoparticles as versatile auxiliary components optoelectronic is one strategy that offers several advantages this respect. In review, first, a brief introduction offered on metal perovskites major performance characteristics related...
Metal halide perovskite nanocrystals (NCs) attract much attention for light-emitting applications due to their exceptional optical properties. More recently, NCs have begun be considered a promising material nonlinear applications. Numerous strategies recently been developed improve the properties of metal NCs. Among them, B-site doping is one most ways enhance brightness and stability. However, there lack study influence on inorganic Here, we demonstrate that Cd2+ simultaneously improves...
Understanding the photosensitization mechanisms in Yb3+-doped perovskite nanocrystals is crucial for developing their anticipated photonic applications. Here, we address this question by investigating near-infrared photoluminescence of mixed-halide CsPbClxBr3–x as a function temperature and revealing its strong dependence on stoichiometry host matrix. To explain observed experimental trends, developed theoretical model which energy transfer from matrix to Yb3+ ions occurs through...
Yb 3+ -CsPbCl x Br 3− perovskite nanocrystals with a high two-photon absorption cross-section of 2.3 × 10 5 GM embedded into amphiphilic silica microspheres emit visible and near-infrared light under infrared excitation in toluene water.
Abstract Metal halide perovskite nanoplatelets (NPls) possess ultra‐narrow photoluminescence (PL) bands tunable over the entire visible spectral range, which makes them promising for utilization in light‐emitting diodes (LEDs) with spectrally pure emission colors. This calls development of synthetic methods toward NPls a high degree control both their thickness and lateral dimensions. A general strategy is developed to obtain such monodisperse CsPbI 3 through halide‐to‐lead ratio during...
Inorganic lead halide perovskite nanocrystals (NCs), particularly CsPbBr3, have attracted considerable attention due to their remarkable optical properties, positioning them as promising candidates for optoelectronics and bioimaging. Despite potential,...
Abstract Metal halide perovskite nanoplatelets (NPls) have recently joined a rich family of 2D semiconductor nanomaterials. Quantum and dielectric confinement in these nanostructures endow them with useful optical properties, which include, but are not limited to, high linear nonlinear absorption coefficients, narrow tunable emission bands, photoluminescence quantum yield. These characteristics render NPls promising for applications lighting, photodetection, optics, photocatalysis. Doping is...
Förster resonant energy transfer (FRET) between PbS quantum dots (QDs) in assemblies of QDs with a narrow size distribution (quasi-monodispersed), embedded porous matrix, is investigated. Analysis size-selective steady-state and transient photoluminescence (PL) these demonstrates the influence FRET on QD optical properties. In particular, we found that drastically changes PL lifetime size-dependence. We show efficiency increases up to 35% as concentration matrix increases. The observed...
X-ray structural analysis, together with steady-state and transient optical spectroscopy, is used for studying the morphology properties of quantum dot superlattices (QDSLs) formed on glass substrates by self-organization PbS dots a variety surface ligands. The diameter QDs varies from 2.8 to 8.9 nm. QDSL's period proportional diameter, increasing slightly size due increase in ligand layer thickness. Removal ligands has number effects QDSLs different sizes: small reduction amount obstructs...
Anion-assisted cation doping in a nonpolar solvent at room temperature has been proposed as universal method to create multiple-band emitting lead halide perovskite nanostructures.
We propose simple and practical method for creation of quantum dot (QD) systems in a porous matrix. The commercial filter paper is soaked the colloidal solution PbS QDs carbon tetrachloride followed by drying. samples prepared demonstrate linear dependencies optical density photoluminescence intensity on QD concentration, excellent homogeneity, reproducibility. A red-shift spectrum after their infiltration into matrix energy transfer between different sizes indicate formation close-packed...
Small angle X-ray scattering, atomic force microscopy, optical and absorption luminescence spectroscopy have shown that the type amount of surface organic ligands a strong impact on morphology properties 2D superlattices formed by lead sulfide quantum dots (QDs) different sizes deposited glass substrate. This allows control process QD self-assembly, homogeneity superlattices, interparticle distance optimization ligands. It has been found annealing aging also influence stability structural...
We describe an experimental setup for the characterization of luminescence from nanostructures. The is intended steady-state and time-resolved measurements in near-infrared region. allows us to study spectral properties range 0.8-2.0 μm with high resolution kinetic between 0.8 1.7 a time 3 ns. capabilities system are illustrated by taking PbS quantum dots. established size dependencies optical dots over wide range. Finally, energy transfer process was studied temporal resolution.
The optical properties of lead sulfide quantum dots (QDs) different sizes embedded in a nanoporous silicate glass matrix (NSM) are investigated by steady-state and transient photoluminescence spectroscopy. use this allows the fabrication samples with reproducible characteristics, for both isolated close-packed QDs. Low-temperature PL analysis QDs 3.7 4.5 nm shows that coefficient temperature shift position changes sign reducing QD size because size-dependent contributions from thermal...
The increasing attention on halide perovskite nanocrystals (PNCs) stems from their outstanding optoelectronic properties, especially the intriguing photoluminescence (PL) features. high quantum yields (up to unity) of PNCs, and tunability optical bandgaps by composition engineering confinement effects, account for demonstrated great potential in several applications, such as light‐emitting diodes (LEDs), phosphors, lasers, photodetectors. However, despite rapid growth this research field,...
The analysis of the steady-state and transient photoluminescence (PL) PbS quantum dots (QDs) diameter in 3.2–6.9 nm range porous matrixes at temperatures 77–300 K shows that QDs different sizes possess entirely temperature dependencies their PL properties. data indicates presence two emissive "in-gap" states low-energy electronic structure with characteristic on QD size temperature. lowest energy state is associated surface defect while higher "intrinsic" arises due to size-dependent...