Search for dissertations about: "wide band gap oxides"

Showing result 1 - 5 of 11 swedish dissertations containing the words wide band gap oxides.

  2. 1. Everything is imperfect: Studies on point defects in insulators

    Author : Christopher Linderälv; Chalmers tekniska högskola; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; boron nitride; band alignment; oxygen vacancies; insulator; optical lineshape; point defects; density functional theory; wide band gap oxides;

    Abstract : Point defects can be detrimental or absolutely necessary for the performance of a material. Due to the implications defects have on a material, defects have been widely studied over the last century. READ MORE

  4. 2. Adatoms, Quasiparticles & Photons : The Multifaceted World of Photoelectron Spectroscopy

    Author : Martin Månsson; Ulf Otto Karlsson; Oscar Tjernberg; Maria Carmen Asensio; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; angle-resolved photoelectron spectroscopy; electronic structure; electron dynamics; semiconductor surfaces; oxides; high-temperature superconductors; Material physics with surface physics; Materialfysik med ytfysik;

    Abstract : The experimental work presented in this thesis is based on a wide assortment of very advanced and highly sophisticated photoelectron spectroscopy (PES) techniques. The objective of the present study has been to reveal and understand the electronic structure and electron dynamics in a broad spectrum of materials, ranging from wide band gap oxides, via semiconductors along with metals, and finally high-temperature superconductors. READ MORE

  5. 3. Optical properties of point defects in insulators and of transition metal dichalcogenides

    Author : Christopher Linderälv; Chalmers tekniska högskola; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; luminescence quenching; charge transition levels; excitons; transition metal dichalcogenides; monolayer alloys; solid state lighting; color centers; oxygen vacancies; moiré structures; wide band gap oxides;

    Abstract : There is a need for new or modified materials, both to improve current devices and to create novel functionalities. Engineering materials to target specific functionalities requires a better understanding of how microscopic processes impact materials properties. READ MORE

  6. 4. Atomic Scale Design of Clean Energy Materials : Efficient Solar Energy Conversion and Gas Sensing

    Author : Jawad Nisar; Rajeev Ahuja; Puru Jena; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; Photocatalysts; Band gap narrowing; Water dissociation; Density functional theory; Gas sensing; Kaolinite; Physics with spec. in Atomic; Molecular and Condensed Matter Physics; Fysik med inriktning mot atom- molekyl- och kondenserande materiens fysik;

    Abstract : The focus of this doctoral thesis is the atomic level design of photocatalysts and gas sensing materials. The band gap narrowing in the metal oxides for the visible-light driven photocatalyst as well as the interaction of water and gas molecules on the reactive surfaces of metal oxides and the electronic structure of kaolinite has been studied by the state-of-art calculations. READ MORE

  7. 5. Physical Properties of Ternary Metal Oxides and Carbon Nanomaterials Under Pressure

    Author : Pablo Botella; Alberto Vomiero; Daniel Errandonea; Victor Lavin Della Ventura; Luleå tekniska universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; Experimentell fysik; Experimental Physics;

    Abstract : Found in nature or synthesized, materials present amazing properties such as superconductivity, super-hardness, lightweight, or high-energy-density, among others. All these properties can be used in our benefit to improve or develop new applications. READ MORE