Browsing Fakultät für Physik (inkl. GAUSS) by Referee "Seibt, Michael PD Dr."
Now showing items 1-20 of 22
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In-situ lithiation of lithium manganese oxide in a transmission electron microscope
(2023-03-15)This thesis presents in-situ studies of the lithiation of lithium manganese oxide in a transmission electron microscope. It focuses on the phase transitions from spinel to tetragonal phase and the role of defects on ... -
Concentrations and Reactions of Iron in Crystalline Silicon after Aluminum Gettering
(2012-03-06)The purity of silicon starting materials and its contamination by several metal impurities are considered to be the major concern in silicon photovoltaics. Minute concentrations of impurities ... -
Hydrogen in V-Fe thin films and Fe/V-Fe multi-layered thin films
(2011-11-25)In this thesis, hydrogen induced biaxial stress and local distribution of hydrogen in V-Fe films and V-Fe/Fe multi-layered films were investigated. The stress development and stress relaxation ... -
Swift heavy ion irradiation of semiconducting materials - defect production, phase transformation and annealing
(2010-09-02)Swift heavy ion irradiation causes several effects on the target material. This doctoral thesis is about two effects, namely track formation and ion beam induced annealing.Tetrahedral ... -
Bestimmung von Platzbesetzung und Bindungsenergien mittels Atomsondentomographie
(2010-07-22)The site occupation of ternary elements in an intermetallic phase is an important area in materials science. Up to now X-Ray based methods and a TEM based method called Atom Location by ... -
Ab-initio Studies of X-ray Scattering
(2010-07-15)As the emergence of the FEL sources opens up new opportunities in material research, the theory and modeling of the behavior of matter in strong x-ray laser fields, as well as novel approaches ... -
Investigation of the segregation behaviour in nanocrystalline materials
(2010-03-04)The ability to chemically identify single atoms in combination with 3D reconstruction of these atoms is the unique characteristic of atom probe tomography (APT). Hence, it has been applied ... -
Transmissionselektronenmikroskopische Untersuchungen zur Koausscheidung von Übergangselementen in kristallinem Silizium
(2009-07-14)Multi-crystalline solar cell silicon is contaminated with a variety of transition metal impurities like copper, nickel and iron. Metallic contaminants enhance the recombination rate of ... -
Growth and Characterization of Carbon-Metal-Nanocomposite-Thin-Films and Self-Organized Layer Growth
(2009-06-09)The simultaneous deposition of carbon and metal ions by mass-selected ion beam deposition leads to the formation of carbon-metal-nanocomposites. The morphology of the resulting films depends ... -
Wechselwirkungen von Gold und Versetzungen in Silizium
(2009-06-04)The knowledge about interactions of different defects in crystalline sillicon are of major importance for the optimisation of the performance of solar cells based on multicrystalline silicon. ... -
Short range ordering and microstructure property relationship in amorphous alloys
(2007-01-29)A novel algorithm, "Next Neighbourhood Evaluation (NNE)", is enunciated during the course of this work, to elucidate the next neighbourhood atomic vicinity from the data, analysed using ... -
Strukturelle Untersuchung der amorph/kristallinen Grenzfläche mittels quantitativer hochauflösender Transmissionselektronenmikroskopie an den Systemen a-Si/c-Si und a-Ge/c-Si
(2006-12-11)In this Thesis the interfaces between covalently bonded crystalline and amorphous materials were studied with regard to the induced ordering in the amorphous material in the interfacial ... -
Self-Organized Formation of Metal-Carbon Nanostructures by Hyperthermal Ion Deposition
(2006-05-23)The quasi-simultaneous deposition of mass-selected hyperthermal carbon and metal ions results in a variety of interesting film morphologies, depending on the metal used and the deposition ... -
Selbstorganisation magnetischer Nanopartikel auf facettierten Saphir-Substraten
(2005-06-14)Self-organisation has been used in this work in many various ways. On the one hand a self-assembling process lead to a transformation of the plane surface of the m-plane Al2O3-substrate ... -
The significance of coherent flow structures for the turbulent mixing in wall-bounded flows
(2004-07-28)For the identification and characterisation of coherent flow structures in turbulent boundary layers and for the examination of the interaction processes between these structures, a flat ... -
Ionenstrahlunterstütztes Wachstum von Zinn-dotierten Indiumoxid-Filmen
(2004-05-24)In this work the optical, electrical and microstructural properties of tin-doped indium oxide (ITO) thin films deposited by ion beam assisted deposition (IBAD) were investigated. One aim ... -
Mechnismen der Stromunterdrückung in supraleitenden YBa2Cu3O7-d Kleinwinkelkorngrenzen
(2004-05-10)In highly textured thin films of the high-temperature superconductor YBa2Cu3O7-d (Y-123) intragranular critical current densities of some 1011 A/m2 at 4.2 Kelvin can be achieved. In contrast to this, in bicrystalline samples ... -
Characterization of hydrogenated silicon thin films and its alloys by the photoconductivity frequency mixing and transient thermoelectric effects methods
(2003-11-25)The charge transport properties of hydrogenated polycrystalline silicon (poly-Si:H) films prepared by the hot-wire chemical vapor deposition (HWCVD) process as a function of deposition rate ... -
Neuaufbau eines Pelletron-Beschleunigers und Untersuchungen zum Laserhydrieren von Silizium
(2003-03-17)Within the context of this thesis, a pelletron accelerator laboratory NEC 9SDH-2 was moved from the Max-Planck-Institut für Kernphysik Heidelberg to the II. Physikalisches Institut der ... -
Mikrostruktur und Wachstum bei der ionenstrahlunterstützten Deposition von Yttrium-stabilisierten Zirkonoxid-Filmen
(2003-02-26)In this work biaxially aligned yttria-stabilized zirconia (YSZ) films fabricated by ion-beam-assisted deposition (IBAD) at room temperature were studied by transmission electron microscopy ...