Search for dissertations about: "electrochromism"

Showing result 1 - 5 of 24 swedish dissertations containing the word electrochromism.

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

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

    Abstract : 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. READ MORE

  2. 2. Electrochromism and over-oxidation in conjugated polymers: Improved color switching and a novel patterning approach

    Author : Payman Tehrani; Magnus Berggren; Nathaniel D Robinson; Ludvig Edman; Linköpings universitet; []
    Keywords : ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Conjugated polymers; Over-oxidation; Patterning; Electrochromism; PEDOT:PSS; Material physics with surface physics; Materialfysik med ytfysik;

    Abstract : During the last 30 years a new research and technology field of organic electronic materials has grown thanks to a groundbreaking discovery made during the late 70’s. This new field is today a worldwide research effort focusing on exploring this new class of materials that also enable many new areas of electronics applications. READ MORE

  3. 3. On the Surface of Conducting Polymers : Electrochemical Switching of Color and Wettability in Conjugated Polymer Devices

    Author : Joakim Isaksson; Magnus Berggren; Kajsa Uvdal; Linköpings universitet; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; Conjugated polymer; electrochemistry; surface energy; electrochromism; contact angle; Electrochemistry; Elektrokemi;

    Abstract : Since the discovery in 1977 that conjugated polymers can be doped to achieve almost metallic electronic conduction, the research field of conducting polymers has escalated, with applications such as light emitting diodes, solar cells, thin film transistors, electrochemical transistors, logic circuits and sensors. The materials can be chemically modified during their synthesis in order to tailor the desired mechanical, electronic and optical properties of the final product. READ MORE

  4. 4. Dynamic and quasi-stationary electrochromic response of amorphous tungsten oxide thin films : In situ combined electrochemical and optical measurements during lithium intercalation

    Author : Edgar Alonso Rojas González; Gunnar Niklasson; Aline Rougier; Uppsala universitet; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; Electrochromism; Optical absorption; Amorphous materials; Tungsten oxide; Electrochemical impedance spectroscopy; Color impedance spectroscopy; Intercalation; Engineering Science with specialization in Solid State Physics; Teknisk fysik med inriktning mot fasta tillståndets fysik;

    Abstract : Electrochromic (EC) materials can adjust their optical properties, reversibly, by means of an external electrical stimulus. They have relevant technological applications; for example, energy-efficient smart windows, which can adapt dynamically—according to the given environmental conditions—to control the heat and visible light fluxes between the interior and exterior of a building. READ MORE

  5. 5. Electrochromic materials : optical, electrophysical and structural properties

    Author : Anne M. Andersson; Chalmers University of Technology; []
    Keywords : mechanical stress; cyclic voltammetry; microstructure; topotaxy; infrared reflectance spectroscopy; window coating; optical characterization; optical characterization; smart window; x-ray electron spectroscopy; soft chemistry; intercalation; energy efficiency; evaporation; electrochromism; polymer electrolyte; ion storage; nickel oxide; Christiansen effect; structural characterization; transmission electron spectroscopy; chemical potential; vanadium oxide; sputtering; electrochemistry; tungsten oxide; thin film technolology; x-ray diffraction spectrometry; infrared reflectance spectroscopy; impedance spectroscpoy;

    Abstract : .... READ MORE