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2014: Recent submissions

Now showing items 81-100 of 115

Продольное магнитосопротивление и осцилляции Шубникова де Гааза в нитях висмута легированных Sn

НИКОЛАЕВА, А.; КОНОПКО, Л.; ЦУРКАН, А.; ПАРА, Г.; БОТНАРЬ, О. (Tehnica UTM, 2014)

В данной работе представлены результаты исследования Шубников де Газ осцилляцийв монокристаллических нитях висмута легированного акцепторной примесью Sn до 0.07ат%. Нити получались литьем из жидкой фазы в стеклянной оболочке ...
Some applications of carbon nanotubes in photovoltaics

VERLAN, Victor; BORDIAN, Olga; IOVU, Mihai; MALAHOV, Ludmila; ENACHESCU, Marius (Tehnica UTM, 2014)

Experimental results on single-walled carbon nanotubes (SWCNTs) and nanocomposite materials ITO/SWCNTs/Al, Au/SWCNTs/n-Si/Al, Al/SWCNTs/P3OT/ITO and Au/SWCNTs/P3OT/n-Si/Al, where P3OT is conducting polymer with conjugated ...
Quantum size effect in semimetal bismuth antimony wires and films

NIKOLAEVA, Albina; KONOPKO, Leonid; GRABOV, Vladimir; DEMIDOV, Evghenii; KABLUKOVA, Natalia; KOMAROV, Vladimir; POPOV, Ivan (Tehnica UTM, 2014)

— We present the experimental results of an investigation of the electron transport of semimetal single- crystal Bi1-xSbx films and wires in temperature range 4.2-300 K. Bi-3at.%Sb films were prepared by the vacuum discrete ...
Effect of p-NiO interlayer on efficiency of p-GaN/n-ZnO LED devices

SIRKELI, Vadim P.; YILMAZOGLU, Oktay; KÜPPERS, Franko; HARTNAGEL, L. (Tehnica UTM, 2014)

We report on numerical study of the characteristics of p-GaN/n-ZnO light-emitting diodes with p-NiO interlayer, and on LED design optimization which includes bandgap engineering, thickness and doping of constituent layers. ...
Photoluminescence of hydrogenated nanocrystalline silicon films

EMELYANOV, Andrey; KAZANSKII, Andrey; FORSH, Pavel; ZHIGUNOV, Denis; KHENKIN, Mark; KASHKAROV, Pavel (Tehnica UTM, 2014)

We have studied structural, electrical and photoluminescence properties of hydrogenated nanocrystalline silicon films with different crystalline volume fractions (from 0 – pristine amorphous silicon – to 55 %). The ...
Optical and photoelectrical features in nanocrystalline indium oxide

FORSH, Ekaterina; MARTYSHOV, Mikhail; FORSH, Pavel; KASHKAROV, Pavel (Tehnica UTM, 2014)

Spectral dependencies of absorption coefficient and persistent photoconductivity in nanocrystalline indium oxide (In2O3) are studied. Nanostructured In2O3 samples with various nanocrystals size are prepared by sol-gel ...
Detection in the contacts with bismuth-antimony alloy: role of contact material and influence of the surface states properties

KERNER, Iacov (Tehnica UTM, 2014)

Diode detectors (DD) are widely used in electronic information and communication systems. In this paper the numerical modeling of the electrical potential distribution and current passing in the contacts of niobium nitride ...
Măsurătoare tehnologice de rezistenţă liniară a microconductorului izolat

NASTAS, Vitalie (Tehnica UTM, 2014)

The paper contributes to solution of the problem of resistance control of overglaze microwire in the technological operations of casting and winding of resistive components. The model of (the) measured objects in this ...
Algorithms of synchronous vector modulation for hybrid multi-converter six-phase system

OLESCHUK, Valentin; ERMURATSKII, Vladimir (Tehnica UTM, 2014)

Topology of dual three-phase (six-phase) adjustable speed motor drives can be based on two standard inverters and two neutral-point-clamped converters. Control of these systems in accordance with specialized schemes and ...
Voltage regulators with limited capacity power supply and Non-Euclidean geometry

PENIN, Alexandr; SIDORENKO, Anatolie (Tehnica UTM, 2014)

The restriction of load power, two–valued regulation characteristic, and interference of several loads is observed in power supply systems with limited power of voltage source. The approach for interpretation of changes ...
Позиционная чувствительность 4-х контактных фотоприемников, изготовленных на основе эпитаксиальных слоев n-CdSe/слюда

СЕНОКОСОВ, Э. А.; ЧУКИТА, В. И.; ХАМИДУЛЛИН, Р. А.; ЧЕБАН, В. Н. (Tehnica UTM, 2014)

Показана возможность создания 4-х контактных позиционно - чувствительных фотоприемников из эпитаксиальных слоев n-CdSe, выращенных в квазизамкнутом объеме на кристаллах слюды. Проведен анализ их позиционной чувствительности ...
Structure features of protocrystalline silicon films

VORONTSOV, Alexander; EMELYANOV, Andrey; FORSH, Pavel; KONSTANTINOVA, Elizaveta; KASHKAROV, Pavel (Tehnica UTM, 2014)

The structural and electronic properties of thin protocrystalline silicon films obtained by plasma-enhanced chemical vapor deposition from hydrogen (H2) and monosilane (SiH4) gas mixture have been studied by means of ...
Particularitățile relaxării spinului electronilor în antimonidul de galiu dopat cu fier

GHEORGHIȚĂ, Andrian; GHEORGHIȚĂ, Eugen; GUȚULEAC, Leonid; MIHĂLACHE, Alexei (Tehnica UTM, 2014)

The present paper analyzes the influence of iron upon mechanisms of the spin relaxation in the gallium antimonide, doped with iron in concentrations of up to 3% at. It is demonstrated, that the for low concentrations of ...
Некоторые особенности распространения света в двойном бесконечном массиве световодов

ЛЯХОМСКАЯ, К. Д.; БЕСПАЛЕНКО, П. В. (Tehnica UTM, 2014)

The peculiarities of the propagation of laser radiation in an array of waveguides is investigated. The array consists of two infinite chains of the linear waveguides. The exact analytical solution were obtained for the ...
S–поляризованные квазиповерхностные симметричные моды в трехслойной структуре с сердцевиной из метаматериала

КОРОВАЙ, О. В. (Tehnica UTM, 2014)

Последние несколько лет в связи с бурным развитием волоконной оптики стремительно возрос интерес к созданию новых типов световодов. Это обусловлено возрастающей потребностью в повышении пропускной способности и эффективности ...
Amplification of THz radiation in the system of excitons and biexcitons

MARKOV, D. A. (Tehnica UTM, 2014)

The new mechanism of terahertz radiation generation (amplification) which is based on the use of quantum transitions between two-exciton and biexciton states is investigated. It is shown, that the enhancement coefficient ...
Теорема площадей в динамике атомно-молекулярной конверсии

ЗИНГАН, А. П.; ХАДЖИ, П. И. (Tehnica UTM, 2014)

Изучена динамика атомно-молекулярной конверсии бозе-эйнштейновского конденсата при падении на систему атомов двух импульсов когерентного лазерного излучения гауссовской формы.
Application of programmable unijunction transistor for converting the analog signal of semiconductor sensor in a frequency-modulated pulse sequence

MIRONOV, Bettin (Tehnica UTM, 2014)

The article describes a circuit in which is used a programmable unijunction transistor for converting an analog signal of the semiconductor sensor in a frequency modulated sequence of pulses.
Proprietăţile electrice ale celulei fotovoltaice cu joncţiune reliefată fabricată prin HVPE

BARANOV, Simion; GORCEAC, Leonid; CINIC, Boris (Tehnica UTM, 2014)

In this report we are represented the electro-physical properties of the photovoltaic cell with single relief junction fabricated on gallium arsenide substrate by HVPE method. This cell have the shunt resistance of 3.8 ...
TTT2I3 organic crystals: 3D modeling of thermoelectric properties

SANDULEAC, Ionel; BALMUS, Ion; CASIAN, Anatolie (Tehnica UTM, 2014)

It was demonstrated theoretically, that organic crystals of TTT2I3 (tetrathiotetracene-iodide) are very prospective thermoelectric materials. The internal structure is strongly quasi-one-dimensional and the thermoelectric ...

Now showing items 81-100 of 115

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