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 9 of 9 for “"Breakdown mechanism"”.
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Multi-Kilovolt Gallium Nitride Power Transistors
… devices can achieve fast switching speed, high breakdown voltage, and small on-resistance. They have been deployed in numerous power electronics applications, outperforming the Si and SiC counterparts. Nevertheless, despite their inherent advantages, the commercialization of GaN devices, …
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AlGaN/GaN-based power semiconductor switches
… semiconductor switches, thanks to their high breakdown electric field, mobility and charge density. The ability to grow these devices on large-diameter Si wafers also reduces device cost and makes them easier for wide market adoption. However, the development of AlGaN/GaN-based power switches …
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Reversible electrical breakdown in amorphous chalcogenides
… has been made of reversible electrical breakdown in amorphous chalcogenides with particular attention being paid to the on-state properties of Si12 Te48As30Ge10 glass threshold switches. Apparatus is described for the preparation of well-characterised materials and flash-evaporated …
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Development of high energy density dielectrics for pulse power applications
… (> 10" diameter and ~0.125 thick) with high breakdown strength (BDS). The presence of porosity and increasing grain size lowers the BDS. Testing conditions such as sample thickness, electrode area, electrode design, and form of applied voltage (DC or pulsed) can also influence the BDS. The …
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Anaerobic, NADH-Dependent Haem Breakdown in a Family of Haemoproteins
… to sequester the Fe$^{2+}$ ion. Typically, this breakdown mechanism is mediated by a haem oxygenase. However, a novel class of reaction has been discovered, which can be performed anaerobically using 'nature's reductant', NADH, and the $\textit{Yersinia enterocolitica}$ protein, HemS. To study …
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Switching mechanisms, electrical characterisation and fabrication of nanoparticle based non-volatile polymer memory devices.
… and much ambiguity concerning the working mechanisms behind many of these PMDs, which is impeding their development. This research explores some of these many unanswered questions and presents new experimental data concerning their operation. One prevalent theory for the conductivity change …
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TiN/HfO2/SiO2/Si gate stacks reliability : Contribution of HfO2 and interfacial SiO2 layer
… needs to be investigated. To understand the breakdown mechanism of high-[kappa]/SiO_2 gate stack completely, it is important to study this multi-layer structure extensively. For example, (i) the role of SiO_2 interfacial layers and bulk high-[kappa] gate dielectrics without any interfacial …
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Impulse breakdown characteristics of SF6 and its mixtures in highly non-uniform field gaps
… University of Strathclyde to study the impulse breakdown characteristics of SF₆ and its mixtures in highly non-uniform field gaps. Of particular interest were the effects of space charge, artificial irradiation, different gas mixtures, different additive gases and different wave fronts on the …
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Understanding the Limits of Lithium-Air Batteries – NMR and Thermodynamic Studies
… would likely have. To aid in studying the breakdown products formed in the lithium air batteries, which limit their lifetime, operando <sup>17</sup>O nuclear magnetic resonance was developed. This technique can non-destructively and in real time track and quantify the formation and removal …