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2019: Recent submissions

Now showing items 1-20 of 67

Influence of Ag, Sb or Ge doping on short-range order of As-S chalcogenide glasses

REVUTSKA, L.; STRONSKI, A.; SHPORTKO, K.; PAIUK, O.; GUDYMENKO, O.; GUBANOVA, A. (Tehnica UTM, 2019)

In this work X-ray diffraction (XRD) technique is employed to investigate the structural properties amorphous As-S-Sb, As-S-Ag and As-S-Ge chalcogenide glasses. The aim of this study is to perform analysis of parameters ...
Surface plasmon resonance in As2Se3 planar waveguides for the IR spectral region

POPESCU, A.; BASCHIR, L.; SAVASTRU, D.; IOVU, M.; STAFE, M.; PUSCAS, N. (Tehnica UTM, 2019)

The solid amorphous materials have some specific optical properties who cannot be finded in the crystalline state. One of the main phenomenon is photo-induced modification of optical constants (n, k), which can be used in ...
Efficient and stable hybrid solar cells of nanostructures and bulk heterojunction Organic semiconductors

RAM, K. S.; SINGH, J. (Tehnica UTM, 2019)

The research and development in the field of organic photovoltaic have gained huge research interests recently. The organic solar cells have exhibited a power conversion efficiency (PCE) up to 12 % . Organic solar cells ...
Study of surface plasmon polarization conversion with Au surface-relief gratings

INDUTNYI, I.; MYN’KO, V.; SOPINSKYY, M. (Tehnica UTM, 2019)

The effect of polarization conversion (PC) caused by excitation of surface plasmons on metal gratings was studied in many theoretical and experimental works. However, these studies mainly concerned the samples with spatial ...
Optical properties of binary and ternary chalcogenides

GALCA, A.-C.; SAVA, F.; SIMANDAN, I.-D.; SOCOL, G.; VELEA, A. (Tehnica UTM, 2019)

Development of memories based on novel chalcogenide materials are among the research directions of many research units aiming discovery of new or improved optical or electric storage media.
Influence of glassy backbone on the photoformation and properties of solid electrolytes Ag: As-S-Ge

TSIULYANU, D.; STRATAN, I.; CIOBANU, M. (Tehnica UTM, 2019)

The work is conducted to clarify the effect of the glassy backbone on the process of fabrication and some properties of solid electrolytes obtained via photodissolution (PD) of Ag. For this purpose the ternary chalcogenide ...
Broad band excitation of RE3+ ions doped into tellurite and antimonite glasses

KOSTKA, P.; ZAVADIL, J.; GLADKOV, P.; YATSKIV, R. (Tehnica UTM, 2019)

Ternary TeO2-ZnO-TiO2 glasses doped with thulium (Tm) and antimonite glasses Sb2O3-PbO-ZnO/ZnS doped with ErCl3 were prepared by using melt quenching method and investigated by means of transmission, and room and low-temperature ...
2D transition metal dichalcogenides for spintronics

COSTACHE, M. V.; BENITEZ, L. A.; ARRIGHI, A.; TORRES, W. S.; TIMMERMANS, M.; SIERRA, J. F.; VALENZUELA, SERGIO O. (Tehnica UTM, 2019)

In this talk I will present recent results regarding spin dynamics in graphene - based transition metal dichalcogenides (TMDC) heterostructures.
Polarization holographic recording of diffractive elements on amorphous chalcogenide nanomultilayers

ACHIMOVA, E. (Tehnica UTM, 2019)

In contrast to the conventional holographic process, in which intensity variations in an interference pattern between an object beam and a reference beam are recorded, polarization holography employs beams with two different ...
Chalcogenide based nano-layered solid electrolytes

TVER’YANOVICH, Yu.; RAZUMTSEV, A.; FAZLETDINOV, T. (Tehnica UTM, 2019)

It is well-known that extensive interphase surface promotes ion conductivity. Nanolayered thin films are suitable for investigation that phenomenon. Films composed of alternating AgI (or Ag2Se) and glass nanolayers were ...
Laser-induced periodic surface structures (LIPSS) of amorphous GST225 thin films upon femtosecond laser irradiation

KOZYUKHIN, S.; LAZARENKO, P.; SMAYEV, M.; VOROBYOV, Yu.; GLUKHENKAYA, V.; SYBINA, Yu.; SIGAEV, V. (Tehnica UTM, 2019)

Ultrashort laser irradiation is proven as an alternative to lithography for nanostructuring surfaces of various materials via formation of laser-induced periodic surface structures (LIPSS) or ripples. In this work, our ...
Grouping of semiconductor materials by degree of atomic structure disorder

POPOV, A. (Tehnica UTM, 2019)

The first practical application of a semiconductor device occurred at the beginning of last century, when a metal-semiconductor contact point was used to demodulate radio signal. However, development of the band structure ...
The direct laser writing micro relief structures on chalcogenide glass by laser beam recorder of master discs

PETROV, V. V.; KRYUCHYN, A. A.; KOSTYUKEVICH, S. A.; RUBISH, V. M. (Tehnica UTM, 2019)

The area of the direct laser writing application is much wider than only recording of optical discs The direct laser writing in photoresist enables to be fabricate a wide range of continuous micro relief phase elements ...
Influence of soft and rigid low frequency vibrations of AsnSm chains and rings in g-As2S3 on the low temperature anomalies

MITSA, V.; FEHER, A.; TKÁČ, V.; HOLOMB, R.; VERES, M. (Tehnica UTM, 2019)

The study of the g-As2S3 thermal conductivity k (T) revealed the temperature hysteresis at low temperature in the temperature range between 11 and 60 K with cooling and heating rates, v1 = 6.4 × 10-3K/s and v2 = 6.9 × 10-3 ...
Surface relief recording-erasing in amorphous chalcogenide layers and nanocomposites

KOKENYESI, S.; MOLNAR, S.; BURUNKOVA, J.; ALKHALIL, G.; CSARNOVICS, I.; KAGANOVSKII, YU. (Tehnica UTM, 2019)

New materials and technologies are under intensive research and development last time for fabrication of separate or integrated photonic elements, matrices, photonic crystals, and metasurfaces in our laboratories and ...
The photoinduced displacement of amorphous chalcogenide and photochromic organic compounds

TETERIS, J. (Tehnica UTM, 2019)

The direct surface patterning of chalcogenide and photochromic organic compound amorphous films via photoinduced displacement of matter was studied. The influence of the amorphous film thickness, grating period, intensity ...
Chalcogenide materials for emerging memories

VELEA, A. (Tehnica UTM, 2019)

Emerging resistive switching (RS) non-volatile memory (NVM) technologies, such as resistive random access memory (RRAM) or phase change memory (PCM), are promising candidates for the next generation of advanced data storage ...
Micro and nanostructuring of chalcogenide glasses

VLCEK, M.; PALKA, K.; SLANG, S.; LOGHINA, L.; IAKOVLEVA, A. (Tehnica UTM, 2019)

Chalcogenide glasses, non-oxide glasses based on one or more chalcogen element (S, Se, Te), usually alloyed with more electropositive network-forming elements such as As, Ge or others posses many unique properties which ...
Enhancing the stoichiometry of sequentially electrodeposited CZTS thin films

ZAKI, M. Ya.; NOUNEH, K.; TOUHAMI, M. Ebn; GALCA, A.-C.; MATEI, E.; PINTILIE, L. (Tehnica UTM, 2019)

Copper zinc tin sulfide (CZTS) is a promising chalcogenide semiconductor which has received increasing interest in the last two decades for applications in solar cells. It offers favorable optical and electronic properties ...
Study of electrodeposited Cu2ZnSnS4 thin film properties by a modified sulfurization process

AZMI, S.; KHOUMRI, EL M.; NOHAIR, M.; GALCA, A.-C.; DABALA, M. (Tehnica UTM, 2019)

Copper zinc tin sulfide (CZTS) is being related to the highly successful Cu(In,Ga)(S,Se)2, and CuInS2 materials, is fast becoming a key instrument for use in thin-film solar cells because of the low cost, environmentally ...

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