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Thèses sur le sujet « Oxide doping »

Auteur : Grafiati
Publié le 9 mars 2023
Mis à jour le 10 mars 2023

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1

Yang, Zheng. "Doping in zinc oxide thin films." Diss., [Riverside, Calif.] : University of California, Riverside, 2009. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:3359913.

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Thesis (Ph. D.)--University of California, Riverside, 2009.<br>Includes abstract. Available via ProQuest Digital Dissertations. Title from first page of PDF file (viewed March 12, 2010). Includes bibliographical references. Also issued in print.
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2

Deyu, Getnet Kacha. "Defect Modulation Doping for Transparent Conducting Oxide Materials." Thesis, Université Grenoble Alpes (ComUE), 2019. http://www.theses.fr/2019GREAI071.

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Le dopage des matériaux semi-conducteurs est une partie fondamentale de la technologie moderne. Les oxydes conducteurs transparents (TCO) constituent une famille de semi-conducteurs, qui sont optiquement transparents et électriquement conducteurs. La conductivité électrique élevée est généralement obtenue grâce à un dopage associant des impuretés de substitution hétérovalentes comme dans In2O3 dopé au Sn (ITO), SnO2 dopé au fluor (FTO) et ZnO dopé à l'Al (AZO). Cependant, ces approches classiques ont dans de nombreux cas atteint leurs limites tant en ce qui concerne la densité de porteurs de c
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3

Taub, Samuel. "Transition metal oxide doping of ceria-based solid solutions." Thesis, Imperial College London, 2013. http://hdl.handle.net/10044/1/18845.

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The effects of low concentration Co, Cr and Mn oxide, singly and in combination, on the sintering and electrical properties of Ce0.9Gd0.1O1.95 (CGO) have been investigated with possible mechanisms suggested to explain this modified behaviour. The influence of these dopants on the densification kinetics of CGO were primarily investigated using constant heating rate dilatometry. Whilst low concentration Co and Mn-oxide were found to improve the sinterability of CGO, the addition of Cr-oxide was found to inhibit the densification kinetics of the material. The location and concentration of these d
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4

PRADA, STEFANO. "Enhancing oxide surface reactivity by doping or nano-structuring." Doctoral thesis, Università degli Studi di Milano-Bicocca, 2014. http://hdl.handle.net/10281/50011.

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Wide band-gap simple oxides are rather inert materials, which found applications in heterogeneous catalysis mainly as supports for active metal nanoparticles. This thesis investigates tailored modifications of the oxide characteristics aimed at making these substrates more reactive in catalytic processes. In particular we are interested in engineering the charge transfer with supported metal catalysts in order to enhance their activity and selectivity. By using first principles calculations in the framework of the density functional theory, we have explored two main routes in this field: 1) na
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5

Wellenius, Patrick. "Nitrogen Doping and Ion Beam Processing of Zinc Oxide Thin Films." NCSU, 2006. http://www.lib.ncsu.edu/theses/available/etd-01042006-015801/.

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The modification of single crystal epitaxial ZnO thin films grown by Pulsed Laser Deposition on c-axis oriented sapphire substrates by Ion Beam Processing was investigated. Nitrogen doping of the films was attempted using nuclear transmutation using the <sup>16</sup>O (<sup>3</sup>He, <sup>4</sup>He) <sup>15</sup>O reaction at 6.6 MeV. The <sup>15</sup>O product is unstable and decays to <sup>15</sup>N after several minutes by positron emission. There are several potential advantages to using nuclear transmutation including producing nitrogen atoms on the correct lattice site for doping and re
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6

Trapatseli, Maria. "Doping controlled resistive switching dynamics in transition metal oxide thin films." Thesis, University of Southampton, 2018. https://eprints.soton.ac.uk/423702/.

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Transition metal oxide thin films have attracted increasing attention due to their potential in non-volatile resistive random access memory (RRAM) devices, where such thin films are used as active layers in metal-insulator-metal (MIM) configurations. Titanium dioxide is one of the most celebrated oxides among the ones that exhibit resistive switching behaviour due to its wide band gap, high thermal stability, and high dielectric constant. RRAM devices with various materials as active layers, have demonstrated very fast switching performance but also huge potential for miniaturisation, which is
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7

Li, Zheng. "Phase behavior of iron oxide doping with ethylbenzene dehydrogenation catalyst promoters." [Ames, Iowa : Iowa State University], 2009. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:3355517.

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8

Rashidi, Nazanin. "Cation and anion doping of ZnO thin films by spray pyrolysis." Thesis, University of Oxford, 2015. https://ora.ox.ac.uk/objects/uuid:e8261559-8901-409d-8d08-a3fc04b6d734.

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ZnO is an n-type semiconducting material with high optical transparency in the visible range (400 - 750 nm) of the electromagnetic spectrum. When doped with group 13 or 14 metal oxides, ZnO exhibits almost metallic electrical conductivity. ZnO thin films have been recognised as promising alternative material for the currently widely-used but expensive indium oxide in the form of indium tin oxide (ITO), in terms of their low cost and the high abundance of zinc. At the moment, even the best solution-processed ZnO films still can not compete for ITO replacement especially in solar energy utilizat
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9

Gharavi-Naeini, Jafar. "Doping and temperature dependence of the Raman spectra lanthanum strontium copper oxide." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape9/PQDD_0028/NQ51865.pdf.

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10

Litzelman, Scott J. "Modification of space charge transport in nanocrystalline cerium oxide by heterogeneous doping." Thesis, Massachusetts Institute of Technology, 2009. http://hdl.handle.net/1721.1/46681.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 2009.<br>Includes bibliographical references (p. 161-170).<br>In the search for new materials for energy conversion and storage technologies such as solid oxide fuel cells, nano-ionic materials have become increasingly relevant because unique physical and transport properties that occur on the nanoscale may potentially lead to improved device performance. Nanocrystalline cerium oxide, in particular, has been the subject of intense scrutiny, as researchers have attempted to link trends in electri
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11

Song, Myung-Eun. "Processing, Structure and Properties of High Temperature Thermoelectric Oxide Materials." Diss., Virginia Tech, 2018. http://hdl.handle.net/10919/98542.

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High temperature thermal energy harvesting has attracted much attention recently. In order to achieve stable operation at high temperatures there is emerging need to develop efficient and oxidation-resistant materials. Most of the well-known materials with high dimensionless figure of merit (ZT) values such as Bi2Te3, PbTe, skutterudites, and half-Heusler alloys, are not thermally stable at temperatures approaching 500°C or higher, due to the presence of volatile elements. Oxide thermoelectric materials are considered to be potential candidates for high temperature applications due to their ro
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12

Randell, Heather Eve. "Applications of stress from boron doping and other challenges in silicon technology." [Gainesville, Fla.] : University of Florida, 2005. http://purl.fcla.edu/fcla/etd/UFE0010292.

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13

Afal, Aysegul. "Hydrothermal Method For Doping Of Zinc Oxide Nanowires And Fabrication Of Ultraviolet Photodetectors." Master's thesis, METU, 2012. http://etd.lib.metu.edu.tr/upload/12614463/index.pdf.

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Nanotechnology comprises of the understanding and control of materials and processes at the nanoscale. Among various nanostructured materials, semiconducting nanowires attract much interest for their novel physical properties and potential device applications. The unique properties of these nanowires are based on their high surface to volume ratio and quantum confinement effect. Zinc oxide, having a direct, wide bandgap and large exciton binding energy, is highly appealing for optoelectronic devices. Due to excellent optical and electrical properties, zinc oxide nanowires have been utilized to
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14

Wang, Junwei. "Chemical doping of metal oxide nanomaterials and characterization of their physical-chemical properties." Case Western Reserve University School of Graduate Studies / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=case1333829935.

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15

Allard, Garvin Richard Johan. "Synthesis and characterization of zinc-doped magnetic nanoparticles for diagnostic studies." University of the Western Cape, 2015. http://hdl.handle.net/11394/4815.

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Magister Scientiae - MSc<br>In the present study we report the synthesis and characterization of iron oxide magnetic nanoparticles doped with zinc in an attempt to enhance the magnetic properties. The nanoparticles were prepared via the co-precipitation route and capped with 3-phosphonopropionic acid (3-PPA). The amount of zinc dopant was varied to yield nanoparticles with the general formula ZnxFe3-xO4 (x=0, 0.1, 0.2, 0.3, 0.4). Characterization was carried out using high resolution transmission electron microscopy (HRTEM), X-ray diffraction spectroscopy (XRD), energy-dispersive X-ray spectro
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16

Han, Donglin. "Doping Behavior of Cations in Perovskite-type Oxide Materials for Protonic Ceramic Fuel Cells." 京都大学 (Kyoto University), 2011. http://hdl.handle.net/2433/151976.

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17

Chai, Jessica Hui Ju. "Combining Zinc Oxide and Silver for Potential Optoelectronic Applications." Thesis, University of Canterbury. Electrical and Computer Engineering, 2010. http://hdl.handle.net/10092/3529.

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Semiconductors represent the enabling technology that underpins the many advances that define modern society. One semiconductor that shows considerable promise in the fabrication of new devices is zinc oxide (ZnO). A fundamental understanding of the properties of a material is required in order to exploit its properties. The behaviour of dopants and defects relevant to optoelectronic device fabrication is of particular interest. However, acceptor doping of ZnO is currently controversial, as successful and reproducible acceptor doping has not yet been achieved. Acceptor doping of ZnO using silv
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18

Paradisi, Andrea. "Ultra-high carrier modulation in two dimensions through space charge doping : graphene and zinc oxide." Thesis, Paris 6, 2016. http://www.theses.fr/2016PA066297/document.

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La modulation de la densité de charge est un aspect important de l'étude de les transitions de phase électroniques ainsi que des propriétés électroniques des matériaux et il est à la base de plusieurs applications dans la micro-électronique. L'ajustement de la densité des porteurs de charge (dopage) peut être fait par voie chimique, en ajoutant des atomes étrangers au réseau cristallin du matériau ou électrostatiquement, en créant un accumulation de charge comme dans un Transistor é Effet de Champ. Cette dernier m ethode est réversible et particuliérement appropriée pour les matériaux bidimens
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19

Wang, Li. "Study of sintering behaviours and mechanical properties of barium strontium cobalt iron oxide ceramics." Thesis, University of Manchester, 2016. https://www.research.manchester.ac.uk/portal/en/theses/study-of-sintering-behaviours-and-mechanical-properties-of-barium-strontium-cobalt-iron-oxide-ceramics(cefae647-0ab8-4f69-9aa6-f91c6aa8239e).html.

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The thesis studies the sintering behaviours and mechanical properties of perovskite-structured Ba0.5Sr0.5Co0.8Fe0.2O3-δ (BSCF) ceramics. The sintering behaviours of BSCF are studied by sintering BSCF powder using a series of sintering temperatures and dwell times. Under all circumstances, only a cubic perovskite structure is identified in as-sintered samples. The relative density of BSCF increases with increasing sintering temperature and dwell time, but shows a more significant increase with increasing temperature. While the grain size increases with increasing sintering temperature and dwell
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20

THANNEERU, RANJITH. "VACANCY ENGINEERED DOPED AND UNDOPED NANOCRYSTALLINE RARE EARTH OXIDE PARTICLES FOR HIGH TEMPERATURE OXIDATION RESISTANT COATING." Master's thesis, University of Central Florida, 2007. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/3986.

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Rare earth oxides with trivalent lattice dopants have been of great interest to researchers in the recent years due to its potential applications in catalysis and high temperature protective coatings. The ability to store oxygen in rare earths is the basis for catalysis because of the ability to change valence states which causes the presence of intrinsic oxygen vacancies in the crystal lattice. Although, several doped-rare earth oxide systems in micron scale have been investigated, the doping effect in cerium oxide nanoparticles with well characterized particle size has not been studied. The
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21

Smith, Steven P. "Lanthanide-containing Nanostructured Materials." Diss., The University of Arizona, 2011. http://hdl.handle.net/10150/145459.

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The research described in this Dissertation is concerned generally with the exploration of the potential use of lanthanide elements in nanostructured materials for the purpose of modification of the magnetic and optical properties. This is explored through a focus on the development of lanthanide-containing iron oxide nanosystems. Our objectives of producing lanthanide containing nanostructured materials with potentially useful optical and magnetic applications has been achieved through the development of lanthanide-doped Fe3O4 and -Fe2O3 nanoparticles, as well as a unique core-shell magnetic-
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22

Pilli, Aparna. "Atomic Layer Deposition of Boron Oxide and Boron Nitride for Ultrashallow Doping and Capping Applications." Thesis, University of North Texas, 2020. https://digital.library.unt.edu/ark:/67531/metadc1752373/.

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The deposition of boron oxide (B₂O₃) films on silicon substrates is of significant interest in microelectronics for ultrashallow doping applications. However, thickness control and conformality of such films has been an issue in high aspect ratio 3D structures which have long replaced traditional planar transistor architectures. B₂O₃ films are also unstable in atmosphere, requiring a suitable capping barrier for passivation. The growth of continuous, stoichiometric B₂O₃ and boron nitride (BN) films has been demonstrated in this dissertation using Atomic Layer Deposition (ALD) and enhanced ALD
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23

Deyu, Getnet Kacha [Verfasser], Andreas [Akademischer Betreuer] Klein, and Lambert [Akademischer Betreuer] Alff. "Defect Modulation Doping for Transparent Conducting Oxide Materials / Getnet Kacha Deyu ; Andreas Klein, Lambert Alff." Darmstadt : Universitäts- und Landesbibliothek Darmstadt, 2020. http://d-nb.info/1205070095/34.

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24

Gunti, Srikanth. "Enhanced Visible Light Photocatalytic Remediation of Organics in Water Using Zinc Oxide and Titanium Oxide Nanostructures." Scholar Commons, 2017. http://scholarcommons.usf.edu/etd/6852.

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The techniques mostly used to decontaminate air as well as water pollutants have drawbacks in terms of higher costs, require secondary treatment, and some methods are very slow. So, emphasis has been given to water though the use of photocatalysts, which break organic pollutants to water and carbon dioxide and leave no trace of by-products at the end. Photocatalytic remediation aligns with the waste and wastewater industries’ zero waste schemes with lower cost, eco-friendly and sustainable treatment technology. The commonly used photocatalysts such as titanium oxide (TiO2), zinc oxide (ZnO), t
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25

Mavlonov, Abdurashid. "Doping Efficiency and Limits in Wurtzite (Mg,Zn)O Alloys." Doctoral thesis, Universitätsbibliothek Leipzig, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-214372.

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In this thesis, the structural, optical, and electrical properties of wurtzite MgxZn1-xO:Al and MgxZn1-xO:Ga thin films have been investigated in dependence on Mg and dopant concentration. Among the transparent conductive oxides (TCOs), ZnO based compounds have gained renewed interest as a transparent electrode for large scale applications such as defroster windows, at panel displays, touch screens, and thin film solar cells due to low material and processing cost, non-toxicity, and suitable physical properties. In general, these applications require transparent electrodes with lowest possible
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26

Giordano, Anthony J. "Altering the work function of surfaces: The influential role of surface modifiers for tuning properties of metals and transparent conducting oxides." Diss., Georgia Institute of Technology, 2014. http://hdl.handle.net/1853/53989.

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This thesis focuses on the use of surface modifiers to tune the properties of both metals and metal oxides. Particular attention is given to examine the modification of transparent conducting oxides (TCOs) including indium tin oxide and zinc oxide both through the use of phosphonic acids as well as organic and metal-organic dopants. In this thesis a variety of known and new phosphonic acids are synthesized. A subset of these molecules are then used to probe the relationship between the ability of a phosphonic acid to tune the work function of ITO and how that interrelates with the coverage
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27

Crowley, Kyle McKinley. "Electrical Characterization, Transport, and Doping Effects in Two-Dimensional Transition Metal Oxides." Case Western Reserve University School of Graduate Studies / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=case1597327584506971.

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28

Patel, Bhavnesh. "Photoluminescence and kinetics of zinc oxide doped with rare earths." Ohio : Ohio University, 1998. http://www.ohiolink.edu/etd/view.cgi?ohiou1176402695.

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29

Amani, Hamedani Hoda. "Development of novel heteronanostructures engineered for electrochemical energy conversion devices." Diss., Georgia Institute of Technology, 2013. http://hdl.handle.net/1853/52158.

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Heterogeneous nanostructures such as coaxial nanotubes, nanowires and nanorods have been of growing interest due to their potential for high energy-conversion efficiencies and charge/discharge rates in solar cell, energy storage and fuel cell applications. Their superior properties at nanoscale as well as their high surface area, fast charge transport along large interfacial contact areas, and short charge diffusion lengths have made them attractive components for next generation high efficiency energy-conversion devices. The primary focus of this work was to understand the doping mechanism of
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30

Guo, Lei. "Synthesis of Zinc Oxide Fiber and Its Application in Dye Sensitized Solar Cells." Miami University / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=miami1283204966.

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31

Patil, Swanand. "FUNDAMENTAL ASPECTS OF REGENERATIVE CERIUM OXIDE NANOPARTICLES AND THEIR APPLICATIONS IN NANOBIOTECHNOLOGY." Doctoral diss., University of Central Florida, 2006. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/3156.

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Cerium oxide has been used extensively for various applications over the past two decades. The use of cerium oxide nanoparticles is beneficial in present applications and can open avenues for future applications. The present study utilizes the microemulsion technique to synthesize uniformly distributed cerium oxide nanoparticles. The same technique was also used to synthesize cerium oxide nanoparticles doped with trivalent elements (La and Nd). The fundamental study of cerium oxide nanoparticles identified variations in properties as a function of particle size and also due to doping with triv
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32

Cornelius, Steffen. "Charge transport limits and electrical dopant activation in transparent conductive (Al,Ga):ZnO and Nb:TiO2 thin films prepared by reactive magnetron sputtering." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2014. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-156145.

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Transparent conductive oxides (TCOs) are key functional materials in existing and future electro-optical devices in the fields of energy efficiency, energy generation and information technology. The main application of TCOs is as thin films transparent electrodes where a combination of maximum electrical conductivity and transmittance in the visible to nearinfrared spectral range is required. However, due to the interdependence of the optical properties and the free electron density and mobility, respectively, these requirements cannot be achieved simultaneously in degenerately doped wide band
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33

Coles-Aldridge, Alice. "Substituted ceria materials for applications in solid oxide fuel cells." Thesis, University of St Andrews, 2018. http://hdl.handle.net/10023/14622.

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Cerias, appropriately doped with trivalent rare earth ions in particular, can have high oxide ion conductivity and are attractive as both SOFC (solid oxide fuel cell) electrolytes and anodes. Here, four groups of candidate electrolyte materials were synthesised using a low temperature method in order to determine the effect of multiple doping on their microstructure and ionic conductivity. In an initial study, seven compositions of Ce0.8SmxGd[sub]yNd[sub]zO1.9 (where x, y and z = 0.2, 0.1, 0.0667 or 0 and x + y + z = 0.2) were synthesised and the properties of multiply-doped materials were com
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34

Peleckis, Germanas. "Studies on diluted oxide magnetic semiconductors for spin electronic applications." Access electronically, 2006. http://www.library.uow.edu.au/adt-NWU/public/adt-NWU20070821.145447/index.html.

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35

Dahlberg, Tobias. "The first order Raman spectrum of isotope labelled nitrogen-doped reduced graphene oxide." Thesis, Umeå universitet, Institutionen för fysik, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-116699.

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The topic of this thesis is the study of nitrogen functionalities in nitrogen-doped reduced graphene oxide using Raman spectroscopy. Specifically, the project set out to investigate if the Raman active nitrogen-related vibrational modes of graphene can be identified via isotope labelling. Previous studies have used Raman spectroscopy to characterise nitrogen doped graphene, but none has employed the method of isotope labelling to do so. The study was conducted by producing undoped, nitrogen-doped and nitrogen-15-doped reduced graphene oxide and comparing the differences in the first-order Rama
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Nakayama, Ryo. "Exploration into an Innovative Science of Hydrogen Functional Materials Using Low-temperature Ion Beam Irradiation." Kyoto University, 2019. http://hdl.handle.net/2433/236604.

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Pant, Bharat Raj. "A Comparative Study on P-type Nickel Oxide and N-type Zinc Oxide for Gas Sensor Applications." University of Toledo / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1525473245395728.

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38

Coathup, David James. "The effect of interface layers and doping on the multiferroic properties of bismuth titanate oxide thin films on silicon." Thesis, Aston University, 2017. http://publications.aston.ac.uk/38210/.

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For the development of magnetoelectric memory devices, the development of artificial magnetoelectric materials is necessary. Previous work in the field had focused on the multiferroic properties of this material in bulk form, however, for a practical device, a thin film investigation is needed. This thesis details the author's investigation into the multiferroic properties of bismuth titanate oxide, Bi4Th012, (BTO) thin films doped with lanthanum, niobium, iron and cobalt, to form the novel material Bi3.2slao.7sLTb.sNbo.2sFeo.mCoo.m012 (BTFC), and how different interface layers influence their
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39

Kwiatkowski, Maciej. "ZnO(core)/TiO2(shell) composites: influence of TiO2 microstructure, N-doping and decoration with Au nanoparticles on photocatalytic and photoelectrochemical activity." Doctoral thesis, Bourgogne Franche-Comté, 2017. https://depotuw.ceon.pl/handle/item/2244.

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Efficient use of renewable energies is one of the most difficult technological challenges facing humanity. Among all renewable energy sources, the sunlight is considered as the most abundant and accessible one. To convert it into usable and controllable form, the modern technology relies on generation of electron-hole pairs in semiconductors upon light absorption. The obtained separated charge carriers possess extra energy brought by the converted sunlight which can be further utilized in various ways. Currently, the most common approach consists in its direct transformation into electricity i
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40

POLO, ANNALISA. "TERNARY OXIDE SEMICONDUCTOR PHOTOANODES FOR SOLAR ENERGY CONVERSION." Doctoral thesis, Università degli Studi di Milano, 2021. http://hdl.handle.net/2434/827287.

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Solar energy conversion and storage into hydrogen is a valuable approach to capture the energy that is freely available from sunlight and to turn it into a clean fuel. Photoelectrochemical (PEC) water splitting through the dual-absorber tandem cell technology has emerged as a promising strategy to this aim. The work conducted in the frame of this PhD thesis aimed at playing a part in the development and optimization of efficient oxide-based semiconductor photoanodes for water oxidation, which is the kinetic bottleneck of the overall PEC water splitting process. Photoanodes based on films of
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Steiner, James David. "Understanding and Controlling the Degradation of Nickel-rich Lithium-ion Layered Cathodes." Thesis, Virginia Tech, 2018. http://hdl.handle.net/10919/85281.

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Consumers across the world use lithium-ion batteries in some fashion in their everyday life. The growing demand for energy has led to batteries dying quicker than consumers want. Thus, there are calls for researchers to develop batteries that are longer lasting. However, the initial increase in battery life over the years has been from better engineering and not necessarily from making a better material for a battery. This thesis focuses on the understanding of the chemistry of the materials of a battery. Throughout the chapters, the research delves into the how and why materials with e
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42

Tang, Yin. "Synthesis and Characterization of Tin Oxide for Thin Film Gas Sensor Applications." Case Western Reserve University School of Graduate Studies / OhioLINK, 2004. http://rave.ohiolink.edu/etdc/view?acc_num=case1089995414.

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43

Hou, Yue. "Enhancement of Nanocrystalline Zinc Oxide based Electronic Gas Sensor by Surface Modification." University of Toledo / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1396609072.

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Milliken, Damion Alexander. "Uranium doping of silver sheathed bismuth-strontium-calcium-copper-oxide superconducting tapes for increased critical current density through enhanced flux pinning." Access electronically, 2004. http://www.library.uow.edu.au/adt-NWU/public/adt-NWU20040810.154223/index.html.

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Kekuda, Dhananjaya. "Property Modulation Of Zinc Oxide Through Doping." Thesis, 2007. http://hdl.handle.net/2005/465.

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Semi conductors are of technological importance and attracted many of the re-searchers. ZnO belongs to the family of II-VI semiconductors and has material properties well suitable to UV light emitters, varistors, Schottky diodes, gas sensors, spintronics, ferroelectric devices and thin film transistors. It has been considered as a competitor to GaN, which belongs to the family of III-V semiconductors. This is due to the fact that ZnO of high quality can be deposited at lower growth temperatures than GaN, leading to the possibility of transparent junctions on less expensive substrates such as g
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Cho, Jinhyun. "Zinc Oxide Nanostructures: Synthesis, Doping and Growth Mechanism." Diss., 2013. http://hdl.handle.net/10161/8186.

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<p>Over the past decade, the study of zinc oxide (ZnO) II-VI semiconducting nanostructures has been a burgeoning research area because of this material's unique electrical and optical properties. Despite the promise of its characteristics for numerous applications, usage of ZnO in the fabrication of nanoscale devices on a commercial scale remains a challenge because of our lack of knowledge of the underlying physics and chemistry of nanostructures. Sustainable progress in nanowire manufacturing techniques requires that we first undertake basic studies to address these poorly understood underly
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Deyu, Getnet Kacha. "Defect Modulation Doping for Transparent Conducting Oxide Materials." Phd thesis, 2020. https://tuprints.ulb.tu-darmstadt.de/9700/1/Getnet%20Kacha%20Deyu-Ph.D.%20Thesis.pdf.

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The doping of semiconductor materials is a fundamental part of modern technology. Transparent conducting oxides (TCOs) are a group of semiconductors, which holds the features of being transparent and electrically conductive. The high electrical conductivity is usually obtained by typical doping with heterovalent substitutional impurities like in Sn-doped In2O3 (ITO), fluorine-doped SnO2 (FTO) and Al-doped ZnO (AZO). However, these classical approaches have in many cases reached their limits both in regard to achievable charge carrier density, as well as mobility. Modulation doping, a mec
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Ho, ChiaTung, and 何家棟. "Preparation of Doping Antimony Tin Oxide Nano Crystals by Hydrtothermal Process." Thesis, 1999. http://ndltd.ncl.edu.tw/handle/75106383965609105218.

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碩士<br>國立臺灣大學<br>化學工程學研究所<br>87<br>The object of this thesis is to systematically discuss the relation between Sb/SnO2 crystal growth and hydrothermal process variables, which include hydrothermal treatment temperature, treatment duration time, salt effect, concentration of original sol. The aqueous Sb/SnO2 sol was prepared by ethanol-water-stannic chloride, and then mixed SnO2 sol with methyl alcohol which contained antimony chloride. Under 260℃and 1 hour duration of hydrothermal treatment, well-distributed crystals of 7.55nm size were formed and the resistivity value of the sol co
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YIN, LIU PING, and 劉丙寅. "Application of Doping Antimony Tin Oxide Nano Material on Electrochemical Capacitor." Thesis, 2001. http://ndltd.ncl.edu.tw/handle/84926168115019542410.

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碩士<br>國立臺灣大學<br>化學工程學研究所<br>89<br>Abstract In this thesis, we report preparation of highly crystallized antimony doped Tin oxide (ATO) sol, by using sol-gel process followed by hydrothermal process. The highly crystallized sol was used to prepare electrochemical capacitor electrode without adding any binder, which insist to characterize the properties of these electrodes in different conditions, and we have also used the ATO thin film electrodes as current-collector to increase the capacitance in various methods. The performance of ATO thin film electrodes exhibited not o
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Huang, Kuo-Lun, and 黃國綸. "Effect of Doping Aluminum Oxide and Cobalt Oxide on the Mechanical and Optical Properties of Sintered Zirconia." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/38jaq3.

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碩士<br>國立臺灣科技大學<br>機械工程系<br>95<br>Tetragonal zirconia polycrystal (TZP, ZrO2-3mol%Y2O3) was doped with cobalt oxide (0.5, 1.0, or 1.5 wt％) and aluminum oxide (0.5, 1.0, or 1.5 wt％) by a solution coating method in the powder state. After sintering the pressed specimens in air at 1430 degC, the relative density of the sintered specimens could be enhanced for the specimens having the approximately equivalent molar ratios of cobalt oxide and aluminum oxide, due to the formation of a spinel phase. The mechanical properties of the doped TZP were only slightly affected by the dopants. A minor fraction
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