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Dissertations / Theses on the topic 'Thin film composition'

Author: Grafiati

Published: 4 June 2021

Last updated: 31 May 2022

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1

Burton, Lee. "Phase stability and composition of tin sulfide for thin-film solar cells." Thesis, University of Bath, 2014. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.642045.

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This thesis details an investigation into the factors that could be restricting the performance of tin sulfide thus far. It is shown that there is confusion in the literature with respect to the assignment of different tin sulfide phases, and that the presence of these phases cannot easily be discerned with routine diffraction methods. In order to better understand the behaviour of tin sulfide in devices, it is important to isolate these materials as separate components and to consider the distinct properties of each. %Indeed, even a fundamental property such as the colour of SnS is still subj

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2

Ericson, Tove. "Reactive sputtering and composition measurements of precursors for Cu2ZnSnS4 thin film solar cells." Licentiate thesis, Uppsala universitet, Fasta tillståndets elektronik, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-208543.

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Cu2ZnSnS4 (CZTS) is a thin film solar cell material that only contains abundant elements and for which promising conversion efficiencies of 9.2 % have been shown. In this thesis composition measurements and reactive sputtering of precursors for CZTS films have been studied. These precursors can be annealed to create high quality CZTS films. Accurate control and measurement of composition are important for the synthesis process. The composition of a reference sample was determined using Rutherford backscattering spectroscopy. This sample was thereafter used to find the composition of unknown sa

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3

Grychanovska, T. M., Віталій Володимирович Бібик, Виталий Владимирович Бибик, Vitalii Volodymyrovych Bibyk, O. S. Gryschuk, and L. A. Sheshenya. "Strain Properties of Thin Film Systems Based on Ni and Ag." Thesis, Sumy State University, 2013. http://essuir.sumdu.edu.ua/handle/123456789/35207.

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Research results of influence of a uniform magnetic field by induction of 200 mT on the longitudinal gauge factor of nanocrystalline film systems of Ni/Ag/Ni with different thickness of non-magnetic layer of Ag within elastic deformation up to 1 are presented. The paper describes methods of forming three-layer structure based on thin films Ni and Ag and research of the structure and phase composition of the obtained samples. The correlation between the factor value of the longitudinal gauge and structural-phase state of film systems is set. When you are citing the document, use the follo

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4

Гричановська, Тетяна Михайлівна, Татьяна Михайловна Гричановская, Tetiana Mykhailivna Hrychanovska, et al. "Strain Properties of Thin Films Based on Ni and Ag in External Magnetic Field." Thesis, Sumy State University, 2015. http://essuir.sumdu.edu.ua/handle/123456789/42685.

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The paper describes the research results of influence of an external magnetic field with 200 mT induction on the longitudinal gauge factor of nano-crystalline film systems of Ni and Ag with different thickness of non-magnetic layer of Ag (or Ni) within elastic deformation up to 1% are presented. Considered methods of forming double- and triplex-layer structure based on thin films Ni and Ag and research of the structure and phase composition of the obtained samples. The correlation between the factor value of the longitudinal gauge factor, structural-phase state of film systems and total thick

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5

Frisk, Andreas. "The Importance of Controlling Composition to Tailor the Properties of Magnetic Thin Films." Doctoral thesis, Uppsala universitet, Materialfysik, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-305523.

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Many physical properties, for example structural or magnetic, of a material are directly dependent on elemental composition. Tailoring of properties through highly accurate composition control is possible in thin films. This work exemplifies such tailoring. A short review is given of the current status for research in the area of permanent magnets, focusing on rare earth element free alternatives, where FeNi in the L10 phase is a possible candidate. Epitaxial FeNi L10 thin films were successfully synthesized by magnetron sputtering deposition of monoatomic layers of Fe and Ni on HF-etched Si(0

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6

Kulkarni, Sachin. "EFFECT OF COMPOSITION, MORPHOLOGY AND SEMICONDUCTING PROPERTIES ON THE EFFICIENCY OF CUIN1-XGAXSE2-YSY THIN-FILM SOLAR CELLS PRE." Doctoral diss., University of Central Florida, 2008. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/2938.

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A rapid thermal processing (RTP) reactor for the preparation of graded CuIn1-xGaxSe2-ySy (CIGSeS) thin-film solar cells has been designed, assembled and is being used at the Photovoltaic Materials Laboratory of the Florida Solar Energy Center. CIGSeS films having the optimum composition, morphology, and semiconducting properties were prepared using RTP. Initially films having various Cu/(In+Ga) ratios were prepared. In the next step selenium incorporation in these films was optimized, followed by sulfur incorporation in the surface to increase the bandgap at the surface. The compositional grad

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7

Бібик, Віталій Володимирович, Виталий Владимирович Бибик, Vitalii Volodymyrovych Bibyk, et al. "Magnetoresistive Properties of Three-Layer Systems on the Basis of Thin Metal Films Fe and V or Ni and V." Thesis, Sumy State University, 2012. http://essuir.sumdu.edu.ua/handle/123456789/35069.

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The paper deals with the methods of forming three-layer structures by layer condensation of nanoscale films Ni, Fe and V. Investigated the magnetoresistive properties of the samples as well as their dependence on annealing temperature and the thickness of nonmagnetic layer. The correlation of magnetoresistance effect with structural-phase state of film system and its components are defined. When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/35069

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8

Zhang, Zhipeng, Wenckstern Holger von, Jörg Lenzner, Michael Lorenz, and Marius Grundmann. "Visible-blind and solar-blind ultraviolet photodiodes based on (InxGa1-x)2O3." American Institute of Physics, 2016. https://ul.qucosa.de/id/qucosa%3A23547.

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UV and deep-UV selective photodiodes from visible-blind to solar-blind were realized based on a Si-doped (InxGa1–x)2O3 thin film with a monotonic lateral variation of 0.0035<x<0.83. Such layer was deposited by employing a continuous composition spread approach relying on the ablation of a single segmented target in pulsed-laser deposition. The photo response signal is provided from a metal-semiconductor-metal structure upon backside illumination. The absorption onset was tuned from 4.83 to 3.22 eV for increasing x. Higher responsivities were observed for photodiodes fabricated from indium-rich

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9

Schmidt-Grund, Rüdiger, Christian Kranert, Wenckstern Holger von, Vitaly Zviagin, Michael Lorenz, and Marius Grundmann. "Dielectric function in the spectral range (0.5–8.5)eV of an (Alx Ga1−x )2O3 thin film with continuous composition spread." American Institute of Physics, 2015. https://ul.qucosa.de/id/qucosa%3A31190.

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We determined the dielectric function of the alloy system (AlxGa1−x)2O3 by spectroscopic ellipsometry in the wide spectral range from 0.5 eV to 8.5 eV and for Al contents ranging from x = 0.11 to x = 0.55. For the composition range x<0.4, we observe single phase material in the b-modification and for larger Al content also the occurrence of γ-(Al,Ga)2O3. We derived spectra of the refractive index and the absorption coefficient as well as energy parameters of electronic bandband transitions by model analysis of the dielectric function. The dependence of the dielectric functions lineshape and

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Kranert, Christian, Jörg Lenzner, Marcus Jenderka, et al. "Lattice parameters and Raman-active phonon modes of (InxGa1–x)2O3 for x < 0.4." American Institute of Physics, 2014. https://ul.qucosa.de/id/qucosa%3A31217.

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We present X-ray diffraction and Raman spectroscopy investigations of (InxGa1–x)2O3 thin films and bulk-like ceramics in dependence of their composition. The thin films grown by pulsed laser deposition have a continuous lateral composition spread allowing the determination of phonon mode properties and lattice parameters with high sensitivity to the composition from a single 2-in. wafer. In the regime of low indium concentration, the phonon energies depend linearly on the composition and show a good agreement between both sample types. We determined the slopes of these dependencies for eight d

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11

Kühn, Julius [Verfasser], Wolfgang [Gutachter] Unger, and Thorsten [Gutachter] Ressler. "Composition and chemistry of Pd-Ni-Co thin film alloys for hydrogen related applications / Julius Kühn ; Gutachter: Wolfgang Unger, Thorsten Ressler." Berlin : Bundesanstalt für Materialforschung und -prüfung (BAM), 2016. http://d-nb.info/1123147981/34.

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12

Kulkarni, Sachin Shashidhar. "Effect of composition, morphology and semiconducting properties on the efficiency of CuIn₁₋x̳Gax̳Se₂₋y̳Sy̳ thin-film solar cells prepared by rapid thermal processing." Orlando, Fla. : University of Central Florida, 2008. http://purl.fcla.edu/fcla/etd/CFE0002467.

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13

Kranert, Christian, Marcus Jenderka, Jörg Lenzner та ін. "Lattice parameters and Raman-active phonon modes of β-(AlxGa1−x)2O3". American Institute of Physics, 2015. https://ul.qucosa.de/id/qucosa%3A31222.

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We present X-ray diffraction and Raman spectroscopy investigations of a (100)-oriented (AlxGa1–x)2O3 thin film on MgO (100) and bulk-like ceramics in dependence on their composition. The thin film grown by pulsed laser deposition has a continuous lateral composition spread allowing to determine precisely the dependence of the phonon mode properties and lattice parameters on the chemical composition. For x<0.4, we observe the single-phase b-modification. Its lattice parameters and phonon energies depend linearly on the composition. We determined the slopes of these dependencies for the individu

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14

Hansson, Henrik. "Understanding interfaces in thin-film solar cells using photo electron spectroscopy. : Effect of post-deposition treatment on composition of the solar cell absorber." Thesis, Uppsala universitet, Institutionen för fysik och astronomi, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-399623.

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The increasing demand of renewable energy is the big driving force for the research and development of more efficient solar energy conversion solutions. Solar cells, which use the photovoltaic effect to convert the photon energy to electrical current, are an important solar energy conversion technique. One solar cell technology is thin-film solar cells. Thin-film solar cells use an absorption layer with a direct band gap. A direct band gap has the advantage that the photons will penetrate less deep until a photoexcitation occur compared to semiconductors with an indirect band gap (e.g. silicon

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15

Bryngelsson, Maria. "Relations between the performance of a coated cutting tool and the composition and properties of the wear resistant coating : A study including first principles modeling, mechanical properties and technological testing." Thesis, Uppsala universitet, Materialteori, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-207566.

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This thesis work was performed at AB Sandvik Coromant and aimed to enhance the knowledge about the relationships between the performance of TiN and TiAlN-coated cutting tools in metal turning and their mechanical and chemical properties. Measurements of coating material properties and turning wear tests in annealed tool steel Sverker 21, stainless steel 316L, grey cast iron V314 and nodular cast iron SS0727 were performed. The cutting temperatures were estimated from FEM-simulations. To find the dominant wear mechanism and identify the properties that are most important for the resistance agai

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16

Kühn, Julius [Verfasser], Wolfgang E. S. [Akademischer Betreuer] Unger, Wolfgang E. S. [Gutachter] Unger, and Thorsten [Gutachter] Ressler. "Composition and chemistry of Pd-Ni-Co thin film alloys for hydrogen related applications / Julius Kühn ; Gutachter: Wolfgang E. S. Unger, Thorsten Ressler ; Betreuer: Wolfgang E. S. Unger." Berlin : Technische Universität Berlin, 2016. http://d-nb.info/115601235X/34.

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17

Грищенко, Вікторія Андріївна. "Вплив йонного опромінення на структурно-фазові перетворення в тонких плівках Cu/Cr, Ni/Cr, Ni/Cu/Cr при термічному відпалі". Master's thesis, КПІ ім. Ігоря Сікорського, 2020. https://ela.kpi.ua/handle/123456789/34696.

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Магістерська дисертація: 81 сторінка, 41 рисунків, 12 таблиць, 38 літературних джерел. Об’єкт досліджень:структурно-фазові перетворення в наношарових композиціях Cu/Cr, Ni/Cr, Ni/Cu/Cr за умов вакуумного термічного відпалу та з додатковою йонно-плазмовою обробкою. Мета роботи: дослідження особливостей впливу попередньої йонно-плазмової обробки на структурно-фазові перетворення у тонких плівках Cu/Cr, Ni/Cr, Ni/Cu/Crза умов термічного відпалу. Методи дослідження: мас-спектрометрія вторинних йонів, трансмісійна електронна мікроскопія, in-situ високоенергетична електронна дифракція. Дослід

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18

Lingg, Linda Jeanne. "Lanthanide trifluoride thin films: Structure, composition, and optical properties." Diss., The University of Arizona, 1990. http://hdl.handle.net/10150/185031.

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This study characterizes thin films of eleven lanthanide trifluorides which are potentially useful for optical applications. The natural and controlled transparency and real refractive index of single layers of these trifluorides are examined and accompanied by studies of composition and crystal structure of the films which are made by conventional, high temperature, and ion-assisted thermal evaporation. Additionally, since these particular fluoride compounds provide an excellent opportunity for doing so, the mechanisms active in film modification through high temperature and ion-assisted ther

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19

Aissaoui, Rached. "Contribution à l'étude des couches minces de l'alliage germanium-sélénium, avec une concentration de germanium inférieure à trente-trois pour cent : élaboration, relaxation, conduction." Rouen, 1986. http://www.theses.fr/1986ROUES046.

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20

Boman, Daniel. "Compositional gradients in sputtered thin CIGS photovoltaic films." Thesis, Uppsala universitet, Fasta tillståndets elektronik, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-355462.

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Cu(In,Ga)Se2 (CIGS) is a semiconductor material and the basis of the promising thin-film photovoltaic technology with the same name. The CIGS film has a typical thickness of 1-2 mm, and solar cells based on CIGS technology has recently reached efficiencies of 23.3%. Ultra-thin CIGS solar cells use sub-micrometer thick films that require significantly less material and can be manufactured in a shorter amount oftime than films with typical thicknesses. With decreasing thickness, both electrical and optical losses get more significant and lower the overall performance. Electrical losses can be de

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21

Porte, Agnès. "Determination des parametres qui regissent la cinetique et la composition d'un depot de gainas/inp par la methode aux hydrures." Clermont-Ferrand 2, 1988. http://www.theses.fr/1988CLF2D162.

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En s'appuyant sur les resultats experimentaux de la croissance de ga::(x)in::(1-x)as/inp en phase vpeur par la methode aux hydrures et sur une theorie cinetique de croisssance qui permet d'exprimer facilement le rapport des pressions partielles de chlorures en fonction de x, detection et analyse de differents phenomenes en jeu dans la croissance. Calcul des parametres necessaires a la prise en compte de ces phenomenes pour la determination des pressions partielles reelles de chacun des constituants de la phase vapeur dans chaque experience realisee. La maitrise de la cinetique du depot et de l

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22

Boyd, Adrian. "Composition, structure and properties of sputter deposited calcium phosphate thin films." Thesis, University of Ulster, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.311526.

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23

Richman, Erik Karl. "Composition and morphology control in mesoporous non-ionic templated thin films." Diss., Restricted to subscribing institutions, 2008. http://proquest.umi.com/pqdweb?did=1490082091&sid=1&Fmt=2&clientId=1564&RQT=309&VName=PQD.

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Orozco, P. J. "Microstructure and physical properties of Cu-Ni compositional thin films." Thesis, University of Bristol, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.384481.

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Trotochaud, Lena. "Structure-Composition-Activity Relationships in Transition-Metal Oxide and Oxyhydroxide Oxygen-Evolution Electrocatalysts." Thesis, University of Oregon, 2014. http://hdl.handle.net/1794/18312.

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Solar water-splitting is a potentially transformative renewable energy technology. Slow kinetics of the oxygen evolution reaction (OER) limit the efficiency of solar-water-splitting devices, thus constituting a hurdle to widespread implementation of this technology. Catalysts must be stable under highly oxidizing conditions in aqueous electrolyte and minimally absorb light. A grand goal of OER catalysis research is the design of new materials with higher efficiencies enabled by comprehensive understanding of the fundamental chemistry behind catalyst activity. However, little progress has been

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Ditto, Jeffrey. "Characterization of the Local Structure and Composition of Low Dimensional Heterostructures and Thin Films." Thesis, University of Oregon, 2016. http://hdl.handle.net/1794/20434.

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The observation of graphene’s extraordinary electrical properties has stirred great interest in two dimensional (2D) materials. The rapid pace of discovery for low dimensional materials with exciting properties continue with graphene allotropes, multiple polymorphs of borophene, germanene, and many others. The future of 2D materials goes beyond synthesis and characterization of free standing materials and on to the construction of heterostructures or sophisticated multilayer devices. Knowledge about the resulting local structure and composition of such systems will be key to understanding and

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Chen, James. "In-situ study of the chemical composition of photochromic Yttrium Oxy-Hydrides thin films." Thesis, Uppsala universitet, Tillämpad kärnfysik, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-389390.

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SCAPIN, VALDIRENE de O. "Aplicacao da fluorescencia de raios X (WDXRF): determinacao da espessura e composicao quimica de filmes finos." reponame:Repositório Institucional do IPEN, 2004. http://repositorio.ipen.br:8080/xmlui/handle/123456789/11157.

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Made available in DSpace on 2014-10-09T12:49:00Z (GMT). No. of bitstreams: 0<br>Made available in DSpace on 2014-10-09T14:05:47Z (GMT). No. of bitstreams: 0<br>Dissertacao (Mestrado)<br>IPEN/D<br>Instituto de Pesquisas Energeticas e Nucleares - IPEN/CNEN-SP

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Kessler, John. "Etude photoelectrochimique des alliages cuin::(1-x)ga::(x)se::(2) : relation entre les proprietesphotovoltaiques des couches minces de cugase::(2) et leur composition." Paris 7, 1988. http://www.theses.fr/1988PA077189.

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L'etude des echantillons massifs de cuin::(1-x)ga::(x)se::(2) de type p permet de mettre au point la solution electrolytique acide en presence du couple redix v**(2+/3+). Etude des positions energetiques des bandes par mesures capacitives. Etude de la variation de la bande interdite en fonction de x et mesure des longueurs de diffusion par l'evolution du photocourant en fonction du potentiel. Etude des proprietes optiques et electroniques des couches minces cugase::(2) de type p en fonction des ecarts a la stoechiometrie

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Narladkar, Ashok S. "Conformation, morphology and glass transition of poly(lactic acid) in supported thin films." Lorient, 2008. http://www.theses.fr/2008LORIS122.

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Les propriétés physiques des polymères, comme par exemple la température de transition vitreuse, se trouvent modifiés lorsque ces derniers sont confinés à proximité d’une paroi. D’un point de vue fondamental, de nombreuses questions restent ouvertes sur la nature exacte de ces variations et sur les paramètres qui les gouvernent. Par ailleurs, la détermination des changements de propriétés de certains polymères lors de confinement, tels que l’acide polylactique (PLA) de part son caractère biocompatible et biodégradable, est indispensable pour de nombreuses applications. Ce travail vise donc à é

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El-Naggar, Mohamed Goodwin David G. "Textured ferroelectric thin films : synthesis, characterization, and influence of compositional grading on the dielectric behavior /." Diss., Pasadena, Calif. : California Institute of Technology, 2007. http://resolver.caltech.edu/CaltechETD:etd-09222006-131741.

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Mráz, Stanislav. "Influence of the plasma chemistry and energetics on the composition and structure evolution of sputtered oxide thin films." Aachen Shaker, 2006. http://nbn-resolving.de/urn:nbn:de:hbz:82-opus-16632.

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Aguir, Khalifa. "Nouvelle methode de pulverisation reactive : synthese et caracterisation de films minces de ga::(x)as::(1-x) amorphe hydrogene." Toulouse 3, 1987. http://www.theses.fr/1987TOU30174.

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Ce procede de synthese utilise pour la premiere fois fait intervenir simultanement des processus competitifs de depot tels que la pulverisation cathodique de ga et la decomposition de l'arsenic dans une decharge luminescente. La caracterisation optique et electrique du plasma a permis de maitriser la zone transitoire et la composition des depots. La nature amorphe des materiaux synthetises et leur structure ont ete mises en evidence par microdiffraction electronique et diffusion raman. Mise en evidence de l'homogeneite par spectrometrie sims. Pour des depots realises a temperature ambiante, la

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Green, Sara. "Electrochromic Nickel – Tungsten Oxides : Optical, Electrochemical and Structural Characterization of Sputter-deposited Thin Films in the Whole Composition Range." Doctoral thesis, Uppsala universitet, Fasta tillståndets fysik, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-179764.

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This thesis investigates the electrochromic NixW1-x oxide thin film system, where 0 < x < 1. The thin films were deposited by reactive DC magnetron co-sputtering from one Ni and one W metal target. In addition, Ni oxide was deposited with water vapor added to the sputtering gas. The different compositions were structurally characterized by X-ray diffraction, X-ray photoelectron-, Rutherford backscattering- and Raman spectroscopy. Possible nanostructures were studied by ellipsometry together with effective medium theory. Optical and electrochemical properties were investigated by spectrop

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Oklobia, Ochai. "Investigations of thermally induced morphology in P3HT/PCBM thin films : influence of composition and thermal annealing on photovoltaic properties." Thesis, Staffordshire University, 2016. http://eprints.staffs.ac.uk/2392/.

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Organic solar cells based on P3HT: PCBM bulk heterojunctions show promise for high power conversion efficiencies. The properties of composite donor polymers and acceptor materials play a significant role; hence the need for optimised bulk heterojunctions active layer morphologies is critical for efficient devices. To achieve optimised bulk heterojunctions, compositional factors and processing conditions are two primary aspects to focus on. Thermal annealing has been demonstrated to be one of the most successful processing techniques for morphology optimisation in P3HT – based organic solar cel

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Lassalle, Francis. "Conception et mise en oeuvre d'un reacteur d'epitaxie gainas/inp par la methode aux hydrures, analyse des conditions de croissance." Clermont-Ferrand 2, 1987. http://www.theses.fr/1987CLF2D193.

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Reacteur permettant la croissance de couches epitaxiques dans le systeme (ga,in,as,p) par transport en phase vapeur et par la methode aux hydrures (ph::(3),ash::(3),h::(2),hcl,in,ga). Sa conception autorise la realisation d'heterostructures a interfaces abruptes en conservant une geometrie de reacteur monochambre. Analyse des conditions de croissance du ternaire gainas sur support inp (100). Mise en evidence de l'effet du non equilibre entre les especes as::(2) et as::(4) sur la presence d'un depot parasite en amont de l'echantillon et sur les caracteristiques du depot. Proposition d'un modele

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Saïd, Alami Mohammed. "Influence du recuit sur l'effet Hall de couches minces de nickel-argent amorphes et microcristallisées." Rouen, 1986. http://www.theses.fr/1986ROUES014.

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Détermination de la composition pour laquelle l'alliage nickel-argent devient amorphe et ferromagnétique, à partir de l'étude de l'effet Hall et de la structure par microscopie électronique. On montre que la température de Curie reste constante dans la phase désordonnée. Apparition d'une phase superparamagnétique au sein de la matrice initiale par recuits successifs

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Mitchson, Gavin. "Insights from Scanning Transmission Electron Microscopy and X-Ray Diffraction Into the Structure and Composition of Non Crystalline Thin Solid Films." Thesis, University of Oregon, 2017. http://hdl.handle.net/1794/22273.

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Non-crystalline thin solid films are seeing increasing interest for a wide variety of applications. However, understanding structure and compositional variations in these films is an immense challenge. Conventional bulk structural or compositional characterization techniques such as X-ray diffraction often do not provide an adequate amount of information on their own. Electron microscopy is an incredibly powerful technique for structural and compositional film characterization, but is limited to inspection of only a small volume of any given sample. Rather than using one technique alone to

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Rosén, Eva J. [Verfasser]. "Theoretical and Experimental Studies Related to the Compositional and Microstructural Evolution of Alumina Thin Films / Eva J Rosén." Aachen : Shaker, 2005. http://d-nb.info/1186579285/34.

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Nguyen, Ba Doan. "Etude de la transition de phase FM-AFM dans des films de FeRh : à gradient de composition et par application de contraintes." Thesis, Université Grenoble Alpes (ComUE), 2016. http://www.theses.fr/2016GREAY016/document.

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Cette thèse porte sur l 'étude et le contrôle des caractéristiques de transition de phase dans les films magnétiques. Dans le cas des films pulvérisés par magnétron à base de FeRh, on a étudié l'influence de la composition et de la souche. La caractérisation magnétique, structurale et électrique a été effectuée en fonction de la position sur des films de composition graduelle. L'ajout d'un troisième élément (Pt ou Ni) a été utilisé pour décaler la température de transition. Nous avons établi qu'un changement dans les propriétés optiques se produit dans les films à base de FeRh en passant de l'

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Mráz, Stanislav [Verfasser]. "Influence of the plasma chemistry and energetics on the composition and structure evolution of sputtered oxide thin films / vorgelegt von Stanislav Mráz." Aachen : Shaker, 2006. http://d-nb.info/982281218/34.

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Woods, Keenan. "Amorphous Metal Oxide Thin Films from Aqueous Precursors: New Routes to High-κ Dielectrics, Impact of Annealing Atmosphere Humidity, and Elucidation of Non-uniform Composition Profiles". Thesis, University of Oregon, 2018. http://hdl.handle.net/1794/23173.

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Metal oxide thin films serve as critical components in many modern technologies, including microelectronic devices. Industrial state-of-the-art production utilizes vapor-phase techniques to make high-quality (dense, smooth, uniform) thin film materials. However, vapor-phase techniques require large energy inputs and expensive equipment and precursors. Solution-phase routes to metal oxides have attracted great interest as cost-effective alternatives to vapor-phase methods and also offer the potential of large-area coverage, facile control of metal composition, and low-temperature processing.

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Atiser, Adil [Verfasser]. "Influence of the plasma chemistry and energetics of an Al cathodic arc discharge on the composition and structure of Alumina thin films / Adil Atiser." Aachen : Shaker, 2011. http://d-nb.info/1080765220/34.

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Dasté, Philippe. "Etude de croissance en phase vapeur aux organometalliques a pression atmospherique d'heterostructures inp/ingaasp et inp/dielectrique a grande uniformite sur substrat de deux pouces." Paris 6, 1986. http://www.theses.fr/1986PA066460.

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Presentation de la conception et de la realisation d'un nouveau type de reacteur pour l'epitaxie en phase vapeur a partir des organometalliques a pression atmospherique. Utilisation pour l'etude des heterointerfaces inp/ingaasp avec pour application les doubles heterostructures laser emettant a 1,3mu m, et pour l'etude de l'interface inp/dielectrique avec pour application les transistors m. I. S. Inp. Uniformite d'epaisseur et uniformite de composition pour le quaternaire

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FERREIRA, HENRIQUE P. "Modificação e poli(fluoreto de vinilideno) induzida por radiação gama para aplicação como compósito ionomérico de metal-polímero." reponame:Repositório Institucional do IPEN, 2012. http://repositorio.ipen.br:8080/xmlui/handle/123456789/10131.

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Made available in DSpace on 2014-10-09T12:35:06Z (GMT). No. of bitstreams: 0<br>Made available in DSpace on 2014-10-09T14:00:28Z (GMT). No. of bitstreams: 0<br>Dissertação (Mestrado)<br>IPEN/D<br>Instituto de Pesquisas Energeticas e Nucleares - IPEN-CNEN/SP

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Degioanni, Simon. "Nanostructures métalliques et effets de composition des verres silicatés pour les capteurs à fibres optiques." Thesis, Lyon 1, 2015. http://www.theses.fr/2015LYO10101/document.

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L'objectif de cette thèse est d'étudier des variations de composition de verres ou l'intégration de nanostructures métalliques pouvant présenter un intérêt pour les capteurs à fibres optiques répartis (CFO). Ces capteurs utilisent le coeur des fibres optiques constitué majoritairement de silice (SiO2) pour sonder la température ou les déformations sur des parcours plurikilométriques de fibres. A cette fin, les rétrodiffusions Raman et Brillouin dans les fibres optiques sont utilisées, la diffusion Raman étant sensible aux variations de température et la diffusion Brillouin aux variations de te

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Доброжан, Олександр Анатолійович, Александр Анатольевич Доброжан, Oleksandr Anatoliiovych Dobrozhan та ін. "Фазовий склад та структурні властивості плівок ZnO отриманих методом спрей-піроліза". Thesis, Інститут фізики напівпровідників ім. В.Є. Лашкарьова НАН України; Національна академія наук України, 2014. http://essuir.sumdu.edu.ua/handle/123456789/38278.

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Оксид цинку (ZnO) одна з найбільш перспективних напівпровідникових сполук для створення різноманітних приладів мікро- та оптоелектроніки. Завдяки широкій забороненій зоні (Eg = 3,37 еВ), хімічній та термічній стабільності в атмосфері оксид цинку розглядається як альтернативний традиційним шарам ITO ((In2O3)0,9+(SnO2)0,1) та FTO (SnO2:F) матеріал для використання як прозорий струмопровідний та антивідбивний шар фотоелектричних перетворювачів сонячної енергії. Ця сполука не містить в своєму складі малопоширених хімічних елементів (таких як In), має найбільшу серед бінарних сполук енергію утворен

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Коваль, Павло Вікторович, Павел Викторович Коваль, Pavlo Viktorovych Koval та ін. "Визначення елементного складу та розподілу елементів по поверхні плівок Pb1-xSnxS методами PIXE та µ-PIXE". Thesis, Інститут фізики напівпровідників ім. В.Є. Лашкарьова НАН України, 2014. http://essuir.sumdu.edu.ua/handle/123456789/38251.

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Тонкі плівки твердого розчину Pb1-xSnxS можуть бути використані для створення приймачів інфрачервоного випромінювання, твердотільних лазерів та ін. Також ці плівки привертають до себе підвищену увагу дослідників як поглинаючі шари дешевих тонкоплівкових сонячних елементів, альтернативні таким традиційним матеріалам як CuInSe2, CuIn1–xGaxSe2, Cu2ZnSnS4(Se) та CdTe. У даній роботі вивчалися плівки Pb1-xSnxTe, отримані методом гарячої стінки у вакуумі на скляних підкладках при різнф температурі нанесення. Для визначення елементного складу конденсатів використовувалося рентгенівське характеристич

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El, Gharras Zohair. "Contribution à l'étude du rôle des défauts sur les phénomènes de transport dans les couches minces de Ge(x)Se(1-x) amorphes." Rouen, 1989. http://www.theses.fr/1989ROUES008.

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Mise en évidence par mesures de conductivité électrique des transformations structurelles à caractère relaxationnel induites par traitement thermique. Etude des variations de la bande interdite optique. Etude du rôle privilégié de certains centres dans les phénomènes de transport

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Lusson, Alain. "Preparation par epitaxie en phase liquide et etude physique des solutions solides cd : :(x)hg::(1-x)te 0,5 <- x <-1." Paris 6, 1987. http://www.theses.fr/1987PA066497.

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Dans le but d'etudier un materiau utilisable pour la fabrication de detecteurs pour les telecommunications par fibre optique a 1,3 et 1,55mu m, des echantillons de cd::(x) hg::(1-x) te(0,5 x 1) ont ete prepares par epitaxie en phase liquide en tube ouvert. Diverses methodes de caracterisation (microsonde electronique, topographie rx, effet hall, sonde ionique. . . ) ont montre la bonne qualite des couches. Le dopage effectue au cours de la croissance par in et cu a ete aborde. Etude des effets d'alliage dans cdhgte par photoluminescence

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