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Now showing items 1821-1840 of 2187

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 ...
Arsenic (III) oxide crystal obtained from technological waste: photoluminescence

BARANOV, Simion; REDWING, Joan; CINIC, Boris (Technical University of Moldova, 2005)

Arsenic (III) oxide was obtained from vapor stream at processing technological waste in manufacturing of the gallium arsenide epitaxial structure. It has a cubic crystal structure, elementary cell a=11.05(4)Ǻ, Fd3m space ...
The photoelectrical properties of bilateral photoelectrochemical cell with nGaAs photo-electrode

TSIULYANU, I.; SIMASHKEVICH, A.; COJOCARU, A.; MACHIUGA, A. (Technical University of Moldova, 2005)

The conversion of solar energy in electrical one is realized by solar cells as a result of absorption of solar energy and the separation of the photoexcited carriers by potential barriers in different solid state structures ...
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 ...
Investigation of registration of the optical information in the amorphous As-Se thin films

IOVU, M. S.; CIORBA, V. G.; COLOMEICO, E. P.; NASTAS, A. M.; PRISACAR, A. M. (Technical University of Moldova, 2005)

The effect of light-induced photodarkening in amorphous As100-xSex (x=40÷98) thin films for different thickness and film composition was investigated. It was established a strong dependence of the red shift of the absorption ...
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 ...
Electrical properties of CuInSe2 crystals obtained by gas transport method

GASHIN, P.; KETRUSH, P.; NIKORICH, V.; SUMAN, V.; TAZLAVAN, V. (Technical University of Moldova, 2005)

The ternary compounds of I-III-VI2 group and their solid solutions recently became one of the most promising materials for the fabrication of high efficiency solar cells. The unique physical properties and relatively low ...
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.
Bose–Einstein condensation of two–dimensional magnetoexcitons. The influence of the excited Landau levels. Energy spectrum of two-dimensional magnetoexcitons

MOSKALENKO, S. A.; DUMANOV, E. V.; PODLESNY, Ig. V.; SHMIGLYUK, M. I. (Technical University of Moldova, 2005)
Autler–townes effect on the excitons and biexcitons in semiconductors

KHADZHI, P. I.; NADKIN, L. Yu.; TKACHENKO, D. V. (2005)

The behavior of the semiconductor dielectric susceptibility under the stationary action of a strong laser pulse in the range of M–band of luminescence and the test pulse in the exciton range of spectrum is investigated. ...
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.
Optical bistability in transmission of thin semiconductor film without external feedback

KHADZHI, Pyotr; MARKOV, Dmitriy; COROVAI, Alexandru (Technical University of Moldova, 2005)

The optical bistability phenomenon in the steady-state light transmission by a thin semiconductor film is studied taking into account two-pulse two-photon excitation of biexcitons from the ground state of the crystal. It ...
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 ...
Investigation of electrical and photoelectrical properties of ITO-nSi structures

USATII, Iu. (Technical University of Moldova, 2005)

ITO-nSi solar cells have been obtained by deposition of ITO layers using spray pyrolisis technique onto the surface of nSi wafers with the area up to 48.6cm2. The study of current-voltage and capacitance-voltage characteristics ...
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 ...
Some urgent problems of electrophysical properties of bismuth and its alloys

BODIUL, Pavel; GITSU, Dmitrii; HUBER, Tito; NIKOLAEVA, Albina; PARA, Gheorghe (Technical University of Moldova, 2005)

Last years bismuth and its alloys attract great attention of a wide circle of researchers. This is determined first of all by the fact that in low dimensional structures based on bismuth one can expect significant increasing ...

Now showing items 1821-1840 of 2187

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