Search for dissertations about: "Bethe-Salpeter equation"

Found 3 swedish dissertations containing the words Bethe-Salpeter equation.

  2. 1. Electronic Structure and Optical Properties of Solar Energy Materials

    Author : Baochang Wang; Natalia Skorodumova; Silvana Botti; KTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; GW; Bethe-Salpeter equation; Kinetic Monte Carlo; Density Functional Theory; Materials Science and Engineering; Teknisk materialvetenskap;

    Abstract : In this thesis, we have studied the electronic and optical properties of solar energy m-terials. The studies are performed in the framework of density functional theory (DFT), GW, Bethe-Salpeter equation (BSE) approaches and Kinetic Monte Carlo (KMC). We present four sets of results. READ MORE

  4. 2. Complex Excitations in Advanced Functional Materials

    Author : Johann Lüder; Barbara Brena; Frank de Groot; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; X-ray Absorption Spectroscopy; Photoelectron Spectroscopy; Adsorption; Phthalocyanines; Biphenylene; Excitons; Functional Materials;

    Abstract : Understanding the fundamental electronic properties of materials is a key step to develop innovations in many fields of technology. For example, this has allowed to design molecular based devices like organic field effect transistors, organic solar cells and molecular switches. READ MORE

  5. 3. First principles study of oxide semiconductors for solar energy applications

    Author : Maofeng Dou; Clas Persson; Huda Muhammad N.; Sergey Simak; Anna Delin; Peter Johansson; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; photocatalysis; water splitting; oxynitrides; dielectric function; first-principles calculation; density functional theory; electronic structures; Casimir interaction; Teknisk materialvetenskap; Materials Science and Engineering;

    Abstract : The objectives of this thesis are to understand the electronic structures of oxides and oxynitrides for photocatalytic water splitting, examine the Casimir interaction between oxides, and explore possible approach to bridge the Casimir force and material properties for advanced material research. The studies were performed in the framework of the density functional theory, many-body perturbation theory, i. READ MORE