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Introduction
Publications
Publications (16)
Полупроводниковые нанокристаллы (квантовые точки, КТ) обладают уникальными фотофизическими свойствами, что открывает широкие возможности их прикладного использования в методах и инструментах современной фотоники. В данной статье рассматриваются возможные приложения КТ. Обсуждаются как существующие устройства, так и перспективы разработки новых мет...
В статье приведен краткий обзор работ, посвященных синтезу, исследованию фотофизических и спектральных свойств и анализу применений полупроводниковых нанокристаллов – квантовых точек (КТ). Обсуждаются фундаментальные закономерности, связывающие морфологию КТ с их оптико-спектральными характеристиками, а также некоторые теоретические модели, позвол...
Colloidal semiconductor nanocrystals (quantum dots, QD) manifest specific temperature dependent luminescence. Here we analyse temperature dependences of CdSe QD luminescence spectrum shift for different composites: polymers, glasses, crystals. The analysis was performed in the terms of electron-phonon coupling, that allows to find and compare the p...
The temperature dependences of the positions of maxima of exciton bands in the luminescence spectra of liquid crystal nanocomposites with CdSe quantum dots with sizes of 1.8 and 2.3 nm at T = 77–300 K have been analyzed. The analysis under the theoretical model taking into account the electron–phonon interaction inside quantum dots has made it poss...
The temperature dependences of the positions of maxima of exciton bands in the luminescence spectra of liquid crystal nanocomposites with CdSe quantum dots with sizes of 1.8 and 2.3 nm at T = 77–300 K have been analyzed. The analysis under the theoretical model taking into account the electron–phonon interaction inside quantum dots has made it poss...
The influence of the concentration and the laser excitation wavelength on the width and luminescence spectrum maximum of CdSe/CdS /ZnS quantum dots in the toluene solution and doped on the glass plate was studied. It was shown that the wavelength of the exciting laser does not affect the width and peak center of the luminescence spectrum of the sam...
![Figure 4. Experimental data [10-12] (points) and result of calculation...](publication/322808963/figure/fig2/AS:588681517756416@1517364019282/Experimental-data-10-12-points-and-result-of-calculation-solid-lines-for-the_Q320.jpg)
A theoretical model is proposed for describing the interaction of excitons with phonons and defect states in semiconductor nanocrystals. On the basis of this model, numerical simulation was performed and experimental data on the temperature dependence of the absorption and fluorescence spectra of cadmium selenide quantum dots in liquid crystal soli...
The mechanisms of broadening of optical spectra of CdSe nanocrystals (quantum dots, QD) synthesized in the liquid crystalline matrix were studied. The experiment confirms that the luminescence spectra of macroscopic samples are broadened inhomogeneously. In addition, small fractions of nanocomposites (with single QDs and small ensembles of QDs) man...
Here we present investigation of the thin film with CdSe nanocrystals with the size 2.3 nm made from low-concentration toluene solution. Using fluorescent microscopy method we have found small nanocrystals ensembles up to single nanocrystals. Luminescence spectra in different parts of the test sample were registered. Analysing them we can draw a co...
Luminescence spectra of the colloidal solution of CdSe quantum dots (in toluene) were studied in a wide range of low temperatures. Samples were synthesized in the liquid crystal matrix of cadmium octanoate (CdC8). A comparative analysis of the obtained data with previous results was performed.
Cadmium selenide quantum dots chemically synthesized in a cadmium caprylate liquid crystal matrix are investigated by means of confocal microscopy. The dependence of the luminescence spectra on temperature in the range of 77.3–300 K, on quantum dot size, and on sample inhomogeneity is investigated.
Quantum confinement effect and its influence on absorption and photoluminescence spectra of CdSe nanoparticles chemically synthesized in thermotropic ionic liquid crystal of cadmium octanoate are studied. It was found out that the spectral resolution grows with decrease of temperature, so it becomes possible to distinguish the band-edge luminescenc...
