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First-Principles Investigation Of Doping And Alloying Of Β-Ga2o3, Ben Tattersfield
First-Principles Investigation Of Doping And Alloying Of Β-Ga2o3, Ben Tattersfield
McKelvey School of Engineering Theses & Dissertations
β-Ga2O3 is an emergent semiconductor for power electronics applications. It has a wide band gap of 4.8 eV and is transparent on the whole spectrum of visible light up to deep ultraviolet. It has a high Baliga figure of merit (BFOM) — a weighted numerical combination of the dielectric constant, charge carrier mobility, and critical breakdown field —, which is commonly used for a quantitative comparison of semiconductors for high-current operation and power switching applications. β-Ga2O3 can be grown as thin films or as large single crystals by melt growth-techniques, which is …
First-Principles Studies Of Anion Engineering In Functional Ceramics, Steven Timothy Hartman
First-Principles Studies Of Anion Engineering In Functional Ceramics, Steven Timothy Hartman
McKelvey School of Engineering Theses & Dissertations
Ceramic materials display a wide variety of valuable properties, such as ferroelectricity, superconductivity, and magnetic ordering, due to the partially covalent bonds which connect the cations and anions. While many breakthroughs have been made by mixing multiple cations on a sublattice, the equivalent mixed-anion ceramics have not received nearly as much attention, despite the key role the anion plays in the materials’ properties. There is great potential for functional ceramics design using anion engineering, which aims to tune the materials properties by adding and removing different types of anions in existing classes of ceramic materials. In this dissertation, I present …