Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 12 of 12 for “"Defect-level"”.
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Intrinsic and Extrinsic Catalysis in Zirconium-based Metal-Organic Frameworks
… site concentration through introduction of defects and macromorphological control, as well as utilization of molecular catalysts imbedded in the MOF structure for multicomponent, light driven reactivity. Chapter 1 introduces the history MOFs and the pursuit of the stable structures commonly …
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Radiation-induced Deep-level Defects in CCD Imaging and Spectroscopy Sensors
… concerned with the analysis of radiation-induced defects within the silicon lattice of a Charge-Coupled Device (CCD) image or spectroscopy sensor and particularly those defects with energy levels which can trap charge as it passes through a device, ultimately leading to image quality degradation. …
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Defect investigations in InAs/GaSb type-II strained layer superlattice
… minority carrier lifetime, resulting from trap levels that cause Schockley-Read-Hall recombination. These low lifetimes lead to reduced signal-to-noise ratio and higher dark current. Therefore, increasing the lifetime is important for improving this material\'s performance. However, to increase …
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Photoconductivity in amorphous silicon
… in energy, extending from the dark Fermi level upwards to 0.6eV below E<sub>c</sub>. The capture cross section of these states was of a value expected for the neutral dangling bond, so they have been denoted as D states. States outside this energy were seen to be ineffective as …
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Decision Support System to Predict the Manufacturing Yield of Printed Circuit Board Assembly Lines
This research focuses on developing a model to predict the yield of a printed circuit board manufactured on a given assembly line. Based on an extensive literature review as well as discussion with industrial partners, it was determined that there is no tool available for assisting engineers in …
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Electrical characterisation of defects in wide bandgap semiconductors.
Defects usually have a very large influence on the semiconductor material properties and hence on fabricated electronic devices. The nature and properties of defects in semiconducting materials can be investigated by applying electrical characterization techniques such as thermal admittance …
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Characterisation of Novel Resistive Switching Memory Devices
… conceived as the rupture/restoration of defect-formed conductive filament (CF) or defect profile modulation, for filamentary and non-filamentary devices respectively. However, details of the underlying microscopic behaviour of the resistive switching in RRAM are still largely missing. In …
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Deep elastic strain engineering of materials electronic properties by machine learning
… further extended the applicable strain levels in these materials, harbingering a new stage of elastic strain engineering of semiconductor fundamental electronic properties and device performance. However, it is not generally easy to know from experiments how much an electronic property …
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High Quality Test Generation at the Register Transfer Level
… must be approached from several different design levels. In particular, exploiting the Register Transfer Level for test generation allows for the use of relational information unavailable at the structural level. This dissertation demonstrates several novel methods for generating tests applicable …
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Understanding the Chemistry and Mechanical Properties of Metal-Organic Framework-Polymer Composites
… examine the difference in crystal structure and defect level. The mechanical properties of these ZIF samples were revealed by nanoindentation on single particles. Overall, the stronger metal-linker bond and high crystallinity were able to yield the highest elastic modulus and hardness. Finally, …
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Characterizing the role of defects on the sensing performance of carbon nanotube and graphene based gas sensors
… this thesis is to investigate the influence of defects on the sensing mechanisms and performance of gas sensors made from films of carbon nanotubes, chemical vapor deposition (CVD) graphene film, CVD graphene ribbons, and surfactant exfoliated graphene. The definition of defects on carbon …
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Interfacial processes in Li-ion batteries
… and conversion reactions of oxides. Evolution of defects in graphene with cycling: In this section, we use Raman spectroscopy and density functional theory (DFT) to investigate the defect formation as a function of lithiation in a model system of monolayer graphene transferred on a Si(111) …