Search for dissertations about: "point defects"

Showing result 1 - 5 of 131 swedish dissertations containing the words point defects.

  1. 1. On hydrogen point defects in perovskite oxides

    University dissertation from ; Chalmers tekniska högskola; Gothenburg

    Author : Erik Jedvik Granhed; [2017]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; density functional theory; oxyhydride; phonon; point defects; chemical expansion; polaron; BaZrO3; proton conductor; BaTiO3;

    Abstract : Oxides based on the perovskite structure exhibit a surprisingly large diversity in materials properties and are found in many different applications, several related to clean energy technologies, such as solar cells, batteries and fuel cells. Many properties in materials are the result of lattice imperfections, commonly denoted \emph{defects}, and much effort is devoted to fine tuning materials properties through controlling the defects therein. READ MORE

  2. 2. Point Defects in Silicon and Silicon-Carbide

    University dissertation from Kista : Mikroelektronik och informationsteknik

    Author : Paolo Pellegrino; KTH.; [2001]
    Keywords : silicon; silicon carbide; defects; dlts;

    Abstract : .... READ MORE

  3. 3. Electronic Structure Calculations of Point Defects in Semiconductors

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Andreas Höglund; Uppsala universitet.; [2007]
    Keywords : Physics; electronic structure calculations; point defects; semiconductor; formation energy; equilibrium solubility limit; thermodynamic equilibrium concentration; transfer levels; negative-U; 110 surface; diffusion; activation energy; solar cells; Fysik;

    Abstract : In this thesis point defects in semiconductors are studied by electronic structure calculations. Results are presented for the stability and equilibrium concentrations of native defects in GaP, InP, InAs, and InSb, for the entire range of doping conditions and stoichiometry. READ MORE

  4. 4. From the Electronic Structure of Point Defects to Functional Properties of Metals and Ceramics

    University dissertation from Stockholm : Materialvetenskap

    Author : David Andersson; KTH.; [2007]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; first principles; ab initio; density functional theory; Calphad; point defects; diffusion; solid electrolytes; oxygen storage materials; TECHNOLOGY Engineering physics Material physics with surface physics; TEKNIKVETENSKAP Teknisk fysik Materialfysik med ytfysik;

    Abstract : Point defects are an inherent part of crystalline materials and they influence important physical and chemical properties, such as diffusion, hardness, catalytic activity and phase stability. Increased understanding of point defects enables us to tailor the defect-related properties to the application at hand. READ MORE

  5. 5. Capacitance Spectroscopy of Point Defects in Silicon and Silicon Carbide

    University dissertation from Kista : Mikroelektronik och informationsteknik

    Author : Denny Åberg; KTH.; [2001]
    Keywords : capacitance spectrocopy; deep levels; deep level transient spectroscopy; thermal donors; thermal double donors; ultra shallow thermal donors; chemical kinetics; silicon carbide; ion implantation; implantation induced defects; implantation induced pas;

    Abstract : .... READ MORE