Search for dissertations about: "wien2k"

Found 3 swedish dissertations containing the word wien2k.

  2. 1. First-Principles Study on Electronic and Optical Properties of Copper-Based Chalcogenide Photovoltaic Materials

    Author : Rongzhen Chen; Clas Persson; Maria G. Ganchenkova; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; density functional theory; electronic structure; dielectric function; absorption coefficient; copper-based chalcogenides; ultra-thin film; Teknisk materialvetenskap; Materials Science and Engineering;

    Abstract : To accelerate environmentally friendly thin film photovoltaic (PV) technologies, copper-based chalcogenides are attractive as absorber materials. Chalcopyrite copper indium gallium selenide (CIGS ≡ CuIn1–xGaxSe2) is today a commercially important PV material, and it is also in many aspects a very interesting material from a scientific point of view. READ MORE

  4. 2. Valence Electron Energy Loss Spectroscopy of III-Nitride Semiconductors

    Author : Justinas Pališaitis; Per Persson; Lars Hultman; Jens Birch; Vicki Keast; Linköpings universitet; []
    Keywords : ;

    Abstract : This doctorate thesis covers both experimental and theoretical investigations of the optical responses of the group III-nitrides (AlN, GaN, InN) and their ternary alloys. The goal of this research has been to explore the usefulness of valence electron energy loss spectroscopy (VEELS) for materials characterization of group III-nitride semiconductors at the nanoscale. READ MORE

  5. 3. Experimental and Theoretical Studies of Metal Adsorbates Interacting with Elemental Semiconductor Surfaces

    Author : Hafiz Muhammad Sohail; Roger Uhrberg; Leif Johansson; Kevin E. Smith; Linköpings universitet; []
    Keywords : ;

    Abstract : Metal adsorbates on semiconductor surfaces have been widely studied over the last few decades. The main interest is focused on various one or two-dimensional structures that exhibit interesting electronic and atomic properties. This thesis focuses on metal adsorbates interacting with the Si(111) and Ge(111) surfaces. READ MORE