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Recent submissions

2005: Recent submissions

Now showing items 141-160 of 192

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 ...
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 ...
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 ...
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. ...
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 ...
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 ...
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 ...
Deformation peculiarities in bidimensional structure ITO/n-Si under concentrated load action

GRABCO, D.; HAREA, E.; SHERBAN, D.; USATYI, Iu. (Technical University of Moldova, 2005)

The development of modern technique requires new information regarding the mechanical properties of various materials having practical application, especially, bidimensional materials for micro- and optoelectronics: films, ...
Acoustical properties of rectangular quantum heterowires with clamped outer surfaces

ZINCENCO, Nadejda D.; NIKA, Denis L.; Al-SABAYLEH, Moayad (Technical University of Moldova, 2005)

We had been theoretically studied the acoustic phonon spectra and group velocities of the phonons in the rectangular GaN nanowire with clamped outer surfaces, covered with elastically dissimilar barriers. The elastic ...
Acoustic properties of cylindrical nanowires with the elastically dissimilar barriers

NIKA, Denis L.; POKATILOV, Evgenii P.; BALANDIN, Alexander A. (Technical University of Moldova, 2005)

We have theoretically investigated the effect of the coating made of the elastically dissimilar material on the acoustic phonon properties of semiconductor nanowires. It is shown that the acoustic impedance mismatch at the ...
Nitrogen localized states in presence of bi-dimensional electron gas in heavily doped GaAs1-xNx

HAMDOUNI, A.; BOUSBIH, F.; BOUZID, S. Ben; CHTOUROU, R.; HARMAND, J. C. (Technical University of Moldova, 2005)

We report a low-temperature photoluminescence spectra (LTPL) of GaAs1-xNx layers and 2 dimension electron gas (2DEG) GaAs1-xNx/AlGaAs modulation doped heterostructure grown on GaAs substrates by molecular beam epitaxy (MBE) ...
Analysis of luminescence mechanism of highly efficient yag and tag phosphors for LED’s application

NAZAROV, Mihail; YOON, Chulsoo (Technical University of Moldova, 2005)

The idea of a white light emitting diode (LED) seems not to be inherently unusual or surprising. It was not until the recent successful creation of high frequency light LEDs in the blue/ultraviolet region when the white ...
Spin-splitted states and spin hall effect induced by polarization in semiconductors structures

KANTSER, V. G.; ARAPAN, S.; BYRLIBA, G.; CYRLIG, S. (Technical University of Moldova, 2005)

A new terms of SOI induced by interband interaction through the electrical polarization or atomic displacement like optical phonons are proposed and analyzed. These SOI mechanisms have the physical nature in the relativistic ...
The Aharonov-Bohm effect in self-assembled InGaAs/GaAs quantum rings

FOMIN, V. M.; GLADILIN, V. N.; DEVREESE, J. T.; OFFERMANS, P.; KLEEMANS, N.; KOENRAAD, P. M.; WOLTER, J. H.; GRANADOS, D.; GARCÍA, J. M. (Technical University of Moldova, 2005)

Based on the structural information obtained from X-STM measurements, we calculate the electron energy spectra in quantum rings (QR)s and the electron orbital magnetization as a function of the applied magnetic field. Shape ...
Role of semiconductor industry in the growth of less developed countries

SINGH, R.; POOLE, K. F. (Technical University of Moldova, 2005)

The semiconductor industry (consisting of design of integrated circuits, semiconductor wafer processing, packaging, testing, and materials supply) with annual sale of over $200 billion serves as a feedstock to the electronics ...
The gated amplifier - discriminator for measurement of temporary parameters of electronic schemes

MIRONOV, B.; MIRONOVA, M. (Technical University of Moldova, 2005)

In practical experimental production both application of digital chips and other electronic circuits, it happens it is necessary to make their selection and classification on temporary parameters. The application of usual ...
Polar - coordinates impedance meter with simulated resonance

NASTAS, Vitalie; CAZAC, Artur; NASTAS, Alexandru (Technical University of Moldova, 2005)

The paper presents an impedance meter based on the effect of simulated resonance. The series resonance circuit supplied with an polar-coordinates impedance simulator, an current signal generator and an phase-sensitive ...
Primary and secondary parameters of the coaxial microwire

COLPACOVICI, Iulian; AVRAM, Ion; GRITCO, Roman; PARVAN, Vladimir (Technical University of Moldova, 2005)

The coaxial microwire is a perspective element for application in microelectronic devices of a radio-frequency wave band. Theoretical definition of primary (linear) parameters of a coaxial microwire is carried out. The ...

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