Sökning: "Gunnar Niklasson"

Visar resultat 1 - 5 av 20 avhandlingar innehållade orden Gunnar Niklasson.

  1. 1. Optical properties and solar selectivity of inhomogeneous metal-insulator coatings

    Författare :Gunnar A. Niklasson; Claes-Göran Granqvist; Ola Hunderi; Chalmers Tekniska Högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : .... LÄS MER

  3. 2. Electrochromism in Nickel-based Oxides : Coloration Mechanisms and Optimization of Sputter-deposited Thin Films

    Författare :Esteban Damián Avendaño Soto; Gunnar Niklasson; Andris Azens; Claes-Göran Granqvist; Ulf Helmersson; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Physics; Nickel based Oxide; Electrochromism; Thin Films; Sputtering; Coloration mechanism; Fysik; Physics; Fysik;

    Sammanfattning : Electrochromic properties of sputter-deposited nickel-based oxide films have been studied with a two-fold goal. From a practical point of view, the optical switching performance has been improved by optimizing the deposition conditions and film stoichiometry with respect to oxygen and hydrogen, and further by adding Mg, Al, Si, Zr, Nb or Ta to the films. LÄS MER

  4. 3. Electrochromic Properties of Iridium Oxide Based Thin Films

    Författare :Jonas Backholm; Gunnar A. Niklasson; Andris Azens; Franco Decker; Uppsala universitet; []
    Nyckelord :Engineering physics; Electrochromism; iridium oxide; hydrogen intercalation; chemical diffusion coefficient; density of states; optical modulation; Teknisk fysik;

    Sammanfattning : Electrochromic iridium oxide (IrOx) and iridium-tantalum oxide (IrTaOx) thin films were prepared by reactive magnetron sputtering. Composition, density, and structure were determined using Rutherford backscattering spectroscopy, X-ray photoelectron spectroscopy, X-ray diffraction, scanning electron microscopy, transmission electron microscopy, and electron energy loss spectroscopy. LÄS MER

  5. 4. Materials Modelling for Energy Harvesting : From Conversion to Application through Storage

    Författare :Amitava Banerjee; Rajeev Ahuja; Gunnar Niklasson; Sudip Chakraborty; Tejs Vegge; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Materials Modelling; DFT; Energy Materials; Photocatalysis; HER and OER; Hybrid Perovskite Solar Cells; Stability; Thermodynamics and Kinetics in Na-ion battery; Organic Crystal Battery;

    Sammanfattning : In this Ph.D. thesis, ab initio density functional theory along with molecular dynamics and global optimization methods are used to unveil and understand the structures and properties of energy relevant materials. In this connection, the following applications are considered: i. LÄS MER

  7. 5. Characterization and modeling of Poly(ethylene imine)-LiTFSI Polymer Electrolytes

    Författare :Ilknur Bayrak Pehlivan; Gunnar A. Niklasson; Claes-Göran Granqvist; Uppsala universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Sammanfattning : .... LÄS MER