IRTUM – Institutional Repository of the Technical University of Moldova

Browsing Articole din publicaţii internaţionale by Title

Browsing Articole din publicaţii internaţionale by Title

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  • Photoluminescence and Raman Study of Well-Aligned ZnO Nanorods on p-Si Substrate 
    URSAKI, V. V.; LUPAN, O.; TIGINYANU, I. M.; CHAI, G.; CHOW, L. (American Scientific Publishers, 2011)
    We report on optical properties of ZnO nanorods grown on p-type Si substrates by an electric-field assisted assembly technique in aqueous solutions applied at relative low temperature (96°C). The results of micro-Raman ...
  • Photoluminescence and resonant Raman scattering from ZnO-opal structures 
    URSAKI, V. V.; TIGINYANU, I. M.; ZALAMAI, V. V.; MASALOV, V. M.; SAMAROV, E. N.; EMELCHENKO, G. A.; BRIONES, F. (American Institute of Physics, 2004)
    We study photoluminescence (PL) of ZnO-opal structures excited by a 351.1 nm laser line. The structures were fabricated by infiltration of ZnO from an aqueous solution of zinc nitrate into opal matrices. The emission ...
  • Photoluminescence and resonant Raman scattering in highly conductive ZnO layers 
    ZALAMAI, V. V.; URSAKI, V. V.; RUSU, E. V.; ARABADJI, P.; TIGINYANU, I. M.; SIRBU, L. (American Institute of Physics, 2004)
    Photoluminescence (PL) and resonant Raman scattering (RRS) excited by the 351.1nm line of an Ar+ laser were studied in highly conductive ZnO layers deposited by thermal decomposition of Zn(C5H7O2)2 metalorganic compound ...
  • Photoluminescence and vibrational properties of nanostructured ZnSe templates 
    MONAICO, E.; TIGINYANU, I. M.; URSAKI, V. V.; SARUA, A.; KUBALL, M.; NEDEOGLO, D. D.; SIRKELI, V. P. (IOP Publishing, 2007)
    Electrochemical etching of pores in as-grown and doped n-type ZnSe substrates is reported. To dope the samples the as-grown semi-insulating substrates were annealed in a Zn melt containing Al impurity at concentrations ...
  • Photoluminescence mechanisms of Tb3+ - doped porous GaP 
    ELHOUICHET, H.; OUESLATI, M.; LORRAIN, N.; LANGA, S.; TIGINYANU, I. M.; FÖLL, H. (WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim, 2005)
    Porous GaP (por-GaP) samples are doped with terbium ions (Tb3+) by simple impregnation followed by high-temperature annealing. From scanning electron microscopy (SEM) and energy dispersive X-ray (EDX) analysis, we show ...
  • Photoluminescence of Ce and Pr codoped calcium thiogallate 
    ANEDDA, A.; CARBONARO, C. M.; CHIRIU, D.; CORPINO, R.; MARCEDDU, M.; RICCI, P. C.; GEORGOBIANI, A. N.; TAGIEV, B. G.; TAGIEV, O. B.; ABUSHEV, S. A.; TIGINYANU, I. M. (John Wiley & Sons, Inc., 2006)
    We investigated the room temperature photoluminescence of calcium thiogallate codoped with Ce and Pr. Line shaped emissions superimposed over a wide and composed luminescence band were observed. Different components were ...
  • Photoluminescence of chemical bath deposited ZnO:Al films treated by rapid thermal annealing 
    SHISHIYANU, S. T.; LUPAN, O. I.; MONAICO, E. V.; URSAKI, V. V.; SHISHIYANU, T. S.; TIGINYANU, I. M. (ELSEVIER, 2005)
    Aluminum-doped zinc oxide (ZnO:Al) films fabricated by chemical bath deposition are characterized using scanning electron microscopy and photoluminescence (PL) spectroscopy. The impact of rapid thermal annealing (RTA) upon ...
  • Photoluminescence of Eu-doped ZnO structures 
    URSAKI, Veaceslav V.; RUSU, Emil; ZALAMAI, Victor; SIRBU, Lilian; MONAICO, Eduard; TIGINYANU, Ion M. (Society of Photo-Optical Instrumentation Engineers, SPIE, 2004)
    ZnO-based red phosphors were prepared by different methods. One phosphor was grown from a Na2B4O7 melt, and another one was prepared from a ZnO:Eu2O3 powder via electron beam treatment. The e-beam processing is found to ...
  • Photoluminescence of ZnO layers grown on opals by chemical deposition from zinc nitrate solution 
    URSAKI, V. V.; TIGINYANU, I. M.; ZALAMAI, V. V.; MASALOV, V. M.; SAMAROV, E. N.; EMELCHENKO, G. A.; BRIONES, F. (IOP Publishing, 2004)
    The emission from ZnO layers grown on the surface of bulk opals using chemical deposition is studied under excitation by the 351.1 nm line of an Ar+ laser at different excitation power densities and temperatures. The ...
  • Photoluminescence properties of PVP/Eu(TTA)2(Phen3PO)2NO3 nanocomposites 
    VERLAN, V. I.; IOVU, M. S.; CULEAC, I.; NISTOR, Y.; TURTA, C. I.; ZUBAREVA, V. E. (Elsevier, 2011)
    Thin films (1–10μm thickness) of nanocomposites (NC) based on organic coordinated compound (OCC) Eu(TTA)2(Phen3PO)2NO3 (where TTA is thenoyltrifluoroacetonate (C8H5F3O2S), Phen – 1,10-phenanthroline (C12H8N2)) and polymer ...
  • Photoluminescence study of /spl alpha/-ZnAl/sub 2/S/sub 4/ single crystals 
    URSAKI, V.; BOLDURESCU, V.; BURLAKOV, I.; SYRBU, N.; NYARI, T. (IEEE, 2000)
    Photoluminescence (PL) spectra of ZnAl/sub 2/S/sub 4/ crystals with spinel structure were studied under the extrinsic excitation. The PL bands at 0.98 eV and 1.34 eV are suggested to be caused by native defects; while the ...
  • Photoluminescence study of CdTe/CdS solar cells grown from a source with Cu residual impurity 
    GHIMPU, L.; URSAKI, V. V.; POTLOG, T.; TIGINYANU, I. M. (IOP Publishing, 2005)
    Three photoluminescence (PL) bands centred at 1.30, 1.35 and 1.45 eV have been observed in the PL spectrum of CdTe/CdS thin film solar cells grown by close space sublimation (CSS) techniques from a source with Cu residual ...
  • Photoluminescence Study of Nitrogen-Related States in ZnSe 
    IVANOVA, Galina N.; NEDEOGLO, Dmitrii D.; NEDEOGLO, Natalia D.; RUSU, Emil V.; SIRKELI, Vadim P.; STRATAN, Gheorghe I.; URSAKI, Veacheslav V. (AIP Publishing LLC, 2007)
    Photoluminescence of N-doped ZnSe crystals is studied at temperatures between 10 and 300 K. Doping with N leads to the formation of simple N-based donor and acceptor defects, as well as associative N-based acceptors. The ...
  • Photoluminescent nanocomposite materials based on SBMA copolymer and CdS 
    IOVU, M.; ENACHESCU, M.; CULEAC, I.; VERLAN, V.; ROBU, S.; BOJIN, D.; NISTOR, Iu.; COJOCARU, I. (SPIE, 2015)
    We present experimental results on copolymer-based nanocomposite made of styrene with butyl methacrylate (SBMA) (1:1) and inorganic semiconductor CdS. Thin film composite samples have been characterized by UV-Vis absorption ...
  • Photoluminescent thin films with nanostructured surface 
    ANDRIESH, A. M.; IOVU, M. S.; CULEAC, I. P.; NISTOR, Iu. H.; ROBU, Şt.; DRAGALINA, G.; POPUŞOI, A.; MITCOV, D.; ENACHE, M.; PETRENKO, P. (Institutul de Fizică Aplicată al AŞM, 2012)
    We present here experimental results on polymer-inorganic nanocomposite material made of styrene with butyl methacrylate (SBMA) with isothiocyanato-chalcone (ITCC) and inorganic semiconductor CdS. Styrene with butyl ...
  • Photoluminescente properties of Eu(o-MBA)3Phen organic compound embedded in PEPC polymer matrix 
    BORDIAN, O.; VERLAN, V.; CULEAC, I.; IOVU, M.; ZUBAREVA, V. (National Institute of Optoelectronics, Romania, 2017)
    We report preparation and characterization of new nanocomposite material based on oligomers poly-N-propyl carbazole (PEPC) and the organic compound Eu(o-MBA)3Phen, where o-MBA – ortho-methylbenzoic acid, Phen – phenanthroline. ...
  • Photonic Crystal Structures Based on GaN Ultrathin Membranes 
    VOLCIUC, Olesea; SERGENTU, Vladimir; TIGINYANU, Ion; SCHOWALTER, Marco; URSAKI, Veaceslav; ROSENAUER, Andreas; HOMMEL, Detlef; GUTOWSKI, Jürgen (American Scientific Publishers, 2014)
    We report on maskless fabrication of ultrathin (d ~ 15 nm) nanoperforated GaN membranes exhibiting a triangular lattice arrangement of holes with a diameter of 150 nm, and show that these membranes represent an intermediate ...
  • Photosensivity of heterostructures produced by aerosol deposition of ZnMgO thin films on Si substrates 
    MORARI, Vadim; POSTOLACHE, Vitalie; RUSU, Emil; LEISTNER, Karin; NIELSCH, Kornelius; URSAKI, V. V.; TIGINYANU, I. M. (Universitatea Politehnică din Bucureşti, 2020)
    ZnMgO thin films were prepared on Si substrates by aerosol deposition method using zinc acetate and magnesium acetate as precursors. The obtained films were investigated by scanning electron microscopy (SEM), energy ...
  • Photouminescence and Optical Properties of PVP/Tb(TTA)2(Ph3PO)2NO3 Nanocomposites 
    VERLAN, V. I.; IOVU, M. S.; CULEAC, I.; NISTOR, Y. H.; TURTA, C. I.; ZUBAREVA, V. E. (SPIE, 2012)
    Thin films (1-10 μm thickness) of nanocomposites (NCs) based on coordinated compounds (CC) Tb(TTA)2(Ph3PO)2NO3 (where TTA is thenoyltrifluoroacetonate (C8H5F3O2S), Ph3PO - triphenylphosphine oxide) and polymer – ...
  • The Photovoltaic Greenhouses - a Challenge for Republic of Moldova 
    BOSTAN, Ion; GUŢU, Aurel; GUŢU-CHETRUŞCA, Corina (IEEE, 2019)
    The photovoltaic greenhouses that emerged at the beginning of the century as a way of arable land preservation through the concordance between electricity generation and crop growth have shown a number of advantages for ...

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