P. S. Parfenov

P. S. Parfenov
ITMO University | SPbNRU ITMO · Department of Optical Physics and Modern Natural Science

PhD

About

77
Publications
6,351
Reads
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662
Citations
Citations since 2017
46 Research Items
453 Citations
2017201820192020202120222023020406080
2017201820192020202120222023020406080
2017201820192020202120222023020406080
2017201820192020202120222023020406080
Additional affiliations
February 2006 - present
National Research University ITMO
Position
  • Researcher
Education
September 2001 - December 2008
Vavilov State Optical Institute
Field of study
  • optics and microscopy
September 1996 - July 2001
The Bonch-Bruevich Saint - Petersburg State University of Telecommunications
Field of study
  • Biomedical engineering

Publications

Publications (77)
Article
Full-text available
In this paper we present the results on the effect of the SiO2 melt cooling rate on the morphology of its surface. The method of atomic force microscopy explores a surface roughness of the silica glass cooled at different rates after its heating up to more than 2100 °C. The study compares three modes of cooling glass rods with a diameter of 14 mm:...
Article
Full-text available
Lead halide perovskite nanoplatelets (NPls) attract significant attention due to their exceptional and tunable optical properties. Doping is a versatile strategy for modifying and improving the optical properties of colloidal nanostructures. However, the protocols for B-site doping have been rarely reported for 2D perovskite NPls. In this work, we...
Preprint
Full-text available
In this paper we present the results on the effect of the SiO 2 melt cooling rate on the morphology of its surface. The method of atomic force microscopy explores a surface roughness of the silica glass cooled at different rates after its heating up to more than 2100 о С. The study compares three modes of cooling glass rods with a diameter of 14 mm...
Article
Full-text available
Granulated zinc metal films on fused quartz and sapphire supports were obtained via pulsed laser deposition and then oxidized in air at different temperatures. We found that optical absorbance spectra of oxide films do not depend on the oxidation temperatures from 400 to 750 °C. The spectra are characterized by the fundamental absorption edge and t...
Article
Semiconductor 2D nanostructures are a new platform for the creation of modern optoelectronic devices. Layered 2D PbSe-MoS 2 nanostructures with efficient photoinduced charge transfer from PbSe nanoplatelets (NPLs) to MoS 2 were created. When PbSe NPLs with short organic ligands are deposited onto a thin layer of MoS 2 NPLs, a decrease in their phot...
Article
The field-effect transistor method is used to study the mobility of charge carriers in layers of lead sulfide nanocrystals with ligands of tetrabutylammonium iodide and 1,2-ethanedithiol used to create solar cells. The difference between the operating of a transistor in ambient air and in an inert atmosphere is demonstrated. It is shown that, in th...
Article
Since chirality is one of the phenomena often occurring in nature, optically active chiral compounds are important for applications in the fields of biology, pharmacology, and medicine. With this in mind, chiral carbon dots (CDs), which are eco-friendly and easy-to-obtain light-emissive nanoparticles, offer great potential for sensing, bioimaging,...
Article
AIEgens represent a special class of molecules, which are emissive in aggregated state, but show almost no fluorescence in dissolved form. Herein we report on the aggregation-induced emission properties of scandium complex with 2-naphtoyltrifluoroacetone ([Sc(NTA)3]). Fluorescence quantum yield of the complex increases ∼68 times, from 0.005 to 0.34...
Article
Full-text available
Hybrid nanomaterials based on graphene and PbS quantum dots (QDs) have demonstrated promising applications in optoelectronics. However, the formation of high-quality large-area hybrid films remains technologically challenging. Here, we demonstrate that ligand-assisted self-organization of covalently bonded PbS QDs and reduced graphene oxide (rGO) c...
Article
Full-text available
Using the dark capacitance–voltage and current–voltage characteristics we analyzed the electrophysical parameters of P3HT:PCBM solar cells with addition of PbS nanocrystals. The influence of the device architecture on the built-in potential value and ideality factor are considered. The process of space-charge limited current characterizing is also...
Article
The research interest in the transition metal dichalcogenides (TMD) has been reborn a few years ago. This had happened due to the remarkable properties of monolayered TMD (e. g. high carrier mobility and high exciton binding energy) and due to the development of the exfoliation methods. Photoconductive MoS 2 -based devices spectral range can be exp...
Article
The effect of the Schottky barrier height changes on the metal/EDT-treated (1,2-ethanedithiol) PbS nanocrystals film interface is considered. Also, the influence of shunts on the J-V characteristic and the Schottky barrier height is demonstrated, as well, the effect of silver oxide layer on the charge accumulation and tunneling. It is shown that th...
Article
Full-text available
Graphene-quantum dot nanocomposites attract significant attention for novel optoelectronic devices, such as ultrafast photodetectors and third-generation solar cells. Combining the remarkable optical properties of quantum dots (QDs) with the exceptional electrical properties of graphene derivatives opens a vast perspective for further growth in sol...
Article
Full-text available
In this work, double plasmon resonances in hybrid structures comprising Ag nanoparticles (NPs) and amorphous hydrogenated carbon films (a-C:H) have been studied. Granulated silver films with a gravimetric thickness of 10 nm were thermally deposited on top or underneath a-C:H films fabricated by plasma-assisted chemical vapour deposition on a quartz...
Article
Full-text available
Iodide atomic surface passivation of lead chalcogenides has spawned a race in efficiency of quantum dot (QD)-based optoelectronic devices. Further development of QD applications requires a deeper understanding of the passivation mechanisms. In the first part of the current study, we compare optics and electrophysical properties of lead sulfide (PbS...
Article
A composite nanostructure based on quasi-one-dimensional InP nanowires with an InAsP nanoinsert, grown on a Si(111) substrate by the method of molecular-beam epitaxy, and CdSe/ZnS zero-dimensional colloidal quantum dots is reported for the first time. The nonradiative resonance energy transfer between components of the hybrid nanostructure, namely,...
Preprint
Full-text available
Chemiphores are entities, which exhibit wide-band light emission without any external light source but just due to the chemical reaction resulting in the chemiluminescence effect. Since the chemiphores usually have low quantum efficiency, chemiluminescence is a weak optical effect. We found that plasmonic nanoparticles can efficiently enhance the p...
Article
The fast and accurate detection of disease-related biomarkers and potentially harmful analytes in different matrices is one of the main challenges in the life sciences. In order to achieve high signal-to-background ratios with frequently used photoluminescence techniques, luminescent reporters are required that are either excitable in the first dia...
Article
Ternary hybrid photovoltaics based on polymers, fullerenes, and colloidal semiconductor quantum dots (QDs) bring together high efficiency and technological flexibility. In order to increase the performance of such hybrid solar cells, thorough control over both film morphology and charge transport is required. In the present work, the morphology and...
Article
In this paper, we describe the experimental setup for analysis of spectral and kinetic photoluminescence parameters in near-infrared spectral region. The setup allows to carry out photoluminescence (PL) measurements in a spectral range of 900–1700 nm, temporal range of 1 ns–100 µs, and temperature range of 77–400 K. The performance of the setup is...
Article
The principle of operation of near-infrared LEDs based on PbS nanocrystals and aspects of their development are considered. The aging of nanocrystals with different ligand shells is analyzed, as well as spectral transmission of the bottom LED layers. Samples of light-emitting diodes based on NC are demonstrated, their electrical and optical paramet...
Article
The techniques of preparation of layers of Cu2 – xSe semiconductor plasmonic nanocrystals (SPNC) with plasmonic resonances in near infrared region from toluene colloidal solution are described. It is shown that combining QDs with SPNC layers lead to the enhancement of optical response from the QDs. The PVA film makes it possible to optimize the QDs...
Article
Semiconductor plasmonic nanocrystals (PNCs) are a novel class of materials for near-infrared (NIR) plasmonics possessing strong and tunable localized surface plasmon resonances (LSPRs). In this work, we used PNCs to fabricate an active substrate for the enhancement of optical responses from near-infrared emitters: a thin film of PNCs in poly(vinyl...
Article
Main methods of photon counting, as well as particularities in detecting micro- and millisecond decay times using a single-photon gated avalanche photodiode, are considered. The influence of the background radiation level on linearity of counting has been determined and the effect of photon superposition during asynchronous counting has been demons...
Article
Full-text available
Silicon is the primary material of modern electronics. It also possesses bright potentials for applications in nanophotonics. At the same time optical properties of bulk silicon do not fully satisfy requirements imposed on them. Fortunately, properties of silicon nanostructures strongly depend on their shapes and sizes. In this regard, of special i...
Article
We report a new type of metamaterials comprising of highly ordered 3D network of 3-7 nm lead sulfide quantum dots self-assembled in organic matrix formed by amphiphilic ligands (oleic acid molecules). Obtained 3D superstructures possess orthorhombic lattice with distance between the nanocrystals of as large as 10-40 nm. Analysis of self assembly an...
Article
Strong enhancement of near-infrared (NIR) emission of lead sulfide quantum dots (QDs) induced by Cu2−xSe semiconductor plasmonic nanocrystals (PNCs), both embedded into nanoporous silicate matrix is reported. The emission enhancement comes from resonant interaction of QD optical transition dipole with the near field of plasmons of semiconductor PNC...
Article
Full-text available
Silicon is the primary material of modern electronics. It also possesses bright potentials for applications in nanophotonics. At the same time optical properties of bulk silicon do not fully satisfy requirements imposed on them. Fortunately, properties of silicon nanostructures strongly depend on their shapes and sizes. In this regard, of special i...
Article
Dye-doped nanoparticles of Eu³⁺ chelate complexes with naphtoyltrifluoroacetone and 1,10-phenanthroline were synthesized using two different reprecipitation techniques. The nanoparticles were characterized by atomic force microscopy, absorption spectroscopy, steady-state, and time-resolved fluorescence spectroscopy. Fluorescent spectroscopy of chel...
Article
It is established that silica optical fibers (SOF) strength increases twice as environment moisture decrease down to water vapors pressure of 10-2 Pa. Further decrease of moisture doesn't influence their strength. Highly-stressed SOF fracture periods of up to 10-3 sec have been found to be controlled by water vapor pressure. SOF treatment by HCl so...
Article
The optical properties of lead sulfide quantum dots (QDs) of different sizes embedded in a nanoporous silicate glass matrix (NSM) are investigated by steady-state and transient photoluminescence spectroscopy. The use of this matrix allows the fabrication of samples with reproducible optical characteristics, for both isolated and close-packed QDs. L...
Article
Full-text available
A combination of physical vapour deposition, thermal annealing and laser irradiation was used to tailoring of the silver nanoparticles array on a quartz substrate. This method for control of optical properties is exploit 355-nm pulsed laser irradiation. Experimental separation of three main overlapped plasmonic modes, dipoles that correspond to par...
Article
The morphology of films, superlattices, and other structures of colloidal nanocrystals has been investigated by atomic force microscopy (AFM). The capabilities of ultrasharp and conventional probes for AFM are compared. The problems of detection of nanocrystal close packing are discussed.
Article
We propose a technique for interpretation of atomic-force microscope images in the structural analysis of nanocrystals formed by precipitation from solution. This technique includes comparison with a simple model describing the random distribution of nanocrystals on a surface. The results obtained are compared to experimental data for purposes of d...
Article
The optical properties of three-dimensional ordered superstructures formed on glass substrates by self-assembly of cadmium selenide or lead sulfide nanocrystals (NCs) are investigated and compared to the optical properties of the initial NC colloidal solutions. The formation of the superstructures is strongly correlated to the presence of oleic aci...
Article
Full-text available
We report on the structural investigation of self-organized assemblies of PbS nanocrystals (NCs) of different sizes, which were deposited on a glass substrate or embedded in a porous matrix. Regardless of the NC size and the type of the substrate and matrix, the assemblies were ordered in two-dimensional superlattices with densely packed NCs. © 201...
Article
The nonradiative photoexcitation energy transfer in systems of densely packed PbS quantum dots (QDs) of different sizes is studied by steady-state and transient photoluminescence (PL) spectroscopy. It is shown that Förster resonance energy transfer dominates the process and dramatically changes the dynamics of the photoexcited charge carriers as co...
Article
Full-text available
Stable water-soluble complexes of Cd-free ZnSe/ZnS quantum dots (QDs) and chlorin e6 complexes have been prepared. These complexes have shown approximately 50% intracomplex fluorescence resonance energy transfer from QDs to chlorin e6. The photodynamic therapy (PDT) test of the complexes against the Erlich acsite carcinoma cell culture demonstrated...
Article
The surface texture is compared for silicon oxide and cerium oxide films obtained by oblique laser deposition at identical angles and deposition rates. This paper discusses how the crystallization tendency of the oxides affects the structure and relief of the deposited film—the length and tilt angle of the resulting columnar crystals to the substra...
Article
X-ray structural analysis, together with steady-state and transient optical spectroscopy, is used for studying the morphology and optical properties of quantum dot superlattices (QDSLs) formed on glass substrates by the self-organization of PbS quantum dots with a variety of surface ligands. The diameter of the PbS QDs varies from 2.8 to 8.9 nm. Th...
Article
Full-text available
The superstructures of different morphology (superlattices and supercrystals) are obtained by self-organization of lead sulfide quantum dots (QDs) on a substrate. In contrast to the SAXS patterns of isolated QDs in solutions, the X-ray intensity from ordered superstructures is modulated by the interference from the QDs in SLs or SCs leading to occu...
Article
A photoexcitation energy transfer process in blends of PbS QDs of different size is considered. An analysis of photoluminescence kinetics shows drastic increase of acceptor decay times. In a triple blend a merger of photoluminescence decay curves recorded at different spectral regions is found. Different pathways of the energy transfer, including t...
Article
The analysis of the steady-state and transient photo-luminescence (PL) of PbS quantum dots (QDs) of diameter in the 3.2-6.9 nm range in porous matrixes at temperatures 77-300 K shows that QDs of different sizes possess entirely different temperature dependencies of their PL properties. The data indicates the presence of two emissive "in-gap" states...
Article
Full-text available
The structure of filter paper used as a porous matrix for incorporating quantum dots (QDs) has been investigated by means of a confocal microscope and an atomic-force microscope. The morphology of the QDs incorporated into its structure has been investigated, using PbS QDs 6.9 nm in diameter as examples. It is shown that the QDs are deposited onto...
Article
Influence of laser irradiation on the supramolecular structure of thin organic dye layers is shown to depend on the presence of metal nanoparticles supporting localized surface plasmon resonance. Silver nanoparticles with the average size of 13 nm were produced on the sapphire substrate via physical vapor deposition under UHV conditions. The thus o...
Conference Paper
Full-text available
In this work self-organized nanostructures from PbS quantum dots of different size, fabricated by the evaporation of solvent on the mica substrate, are investigated. It is shown that, the obtained structures posses SAXS patterns similar to ones from real atomic crystals.
Conference Paper
We present some results obtained by steady-state and time-resolved fluorescence analysis of PbS quantum dots in solution and in a porous matrix. Distribution of QDs in the porous matrix was investigated by atomic-force and confocal microscopy to clarify an energy transfer in formed closed packed structures. Hardware and software for fluorescence me...
Article
Full-text available
Concentration-dependent optical properties of lead sulfide (PbS) quantum dots (QDs) embedded into a porous matrix are investigated. A red shift of luminescence peak position depends on QD concentration and evidences for F¨orster resonant energy transfer (FRET) inside the quasi-monodispersed assemblies. PL decay curves show significant influence of...
Article
Full-text available
X-ray structural analysis is used for investigation of structures, obtained by self-organization from nanoparticles - lead sulfide (PbS) quantum dots (QDs) of different sizes - deposited on a glass substrate or embedded in a porous matrix. These nanostructures obtained by both methods represent ordered close-packed structures of the nanoparticles....
Article
Forster resonant energy transfer (FRET) between PbS quantum dots (QDs) in assemblies of QDs with a narrow size distribution (quasi-monodisperse), embedded in a porous matrix is investigated. Analysis of size-selective steady-state and transient photoluminescence (PL) of these assemblies demonstrates the influence of FRET on the QD optical propertie...
Article
We describe an experimental setup for the characterization of luminescence from nanostructures. The setup is intended for steady-state and time-resolved luminescence measurements in the near-infrared region. The setup allows us to study spectral luminescence properties in the spectral range of 0.8-2.0 μm with high spectral resolution and kinetic lu...
Article
Full-text available
Nonradiative fluorescence resonance energy transfer (FRET) between lead sulfide quantum dots (QDs) of two different sizes embedded in porous matrix is observed by a fluorescence spectroscopy. Analysis of decays of photoluminescence from QD mixture shows that energy transfer in studied systems is determined by static quenching, specific for direct c...
Article
Full-text available
PbS quantum dots (QDs) with diameter of 2.9-7.4 nm were embedded into a porous matrix. The samples prepared by developed low-cost effortless method demonstrate linear dependencies of optical density and luminescence intensity on the QDs concentration and perfect homogeneity. Optical properties of quantum dots in the matrix were studied using absorp...
Article
We propose simple and practical method for creation of quantum dot (QD) systems in a porous matrix. The commercial filter paper is soaked in the colloidal solution of PbS QDs in carbon tetrachloride followed by drying. The samples prepared by the method demonstrate linear dependencies of optical density and photoluminescence intensity on the QD con...
Article
Full-text available
We study size dependence of kinetic and spectral properties of near-infrared luminescence from PbS quantum dots in colloidal solution. Luminescence lifetimes are found to lie between 250 ns for the largest quantum dots and 2:5 μs for the smallest ones, while the Stoke's shift is found to increase from 4-5 to 300 meV. These results are explained by...
Article
We report on an anomalous size dependence of the room-temperature photoluminescence decay time from the lowest-energy state of PbS quantum dots in colloidal solution, which was found using the transient luminescence spectroscopy. The observed 10-fold reduction in the decay time (from ∼2.5 to 0.25 μs) with the increase in the quantum dots' diameter...
Article
Methods for recording luminescence decay times of semiconductor PbS quantum dots (QDs) with optical transitions in the near-IR spectral range have been analyzed. A measuring complex for spectral and kinetic analysis in the near-IR range (0.8-2.0 mu m) in the time interval from several tens of nanoseconds to several tens of microseconds is described...
Article
We present an analysis of methods for calibration of the spectral sensitivity of instruments in the near IR region of the spectrum (0.90–2.05μm), using as an example recording of the luminescence spectra of PbS semiconductor quantum dots using a diffraction monochromator and an InGaAs photodiode as the detector. We show that when high-sensitivity d...
Article
This paper describes the design features and technical parameters of a complex for characterizing the fluorescence parameters of macro- and microsamples in the near-IR region. Along with the standard 90 degrees setup for exciting and recording the fluorescence, a microfluorimetric technique is used. Two types of InGaAs photodiodes are compared, and...
Article
Full-text available
This paper discusses the features of the switching dynamics of the phase lag of light by 2π and 4π in cells with a dual-frequency nematic liquid crystal as a result of bend and splay deformation of layers with oblique homeotropic orientation by means of an electric field with frequency 30kHz and as a result of relaxation when a low-frequency field...
Article
The interaction of CdSe/ZnS nanocrystals (NCs) (solubilized by trioctylphosphine oxide (TOPO) molecules) with ortho-phenanthroline (OP) molecules has been investigated. It is shown that OP molecules can replace TOPO; in this case, bonding of OP molecules with the nanocrystal surface does not lead to the formation of NC aggregates. It is established...
Article
This paper describes the operating principle of a luminescence video analyzer of biochips, based on a specially developed superbroad-band projection mirror-lens-prism objective. The video analyzer makes it possible to work with diagnostic tuberculosis chips. The field of view of the video analyzer is 6×8 mm, and the resolution over the field is bet...

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