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Electrochromism In Nickel-based Oxides Coloration Mechanisms & Optimization Of Sputter-deposited Thin Films (Uppsala Dissertations from the Faculty of Science & Technology) by Esterban Damian Avendano Soto

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Published by Uppsala Universitet .
Written in English

Subjects:

  • Material Science,
  • Technology,
  • Science/Mathematics

Book details:

The Physical Object
FormatPaperback
Number of Pages125
ID Numbers
Open LibraryOL12854595M
ISBN 10915545996X
ISBN 109789155459963
OCLC/WorldCa56334121

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  Electrochromic multilayer coatings with nickel oxide and tungsten oxide films joined by a polymer electrolyte have several good properties, but their optical absorptance has remained undesirably high. This paper reports on electrochromism in films based on nickel oxide with a variety of additives (Mg, Al, Si, V, Zr, Nb, Ag, or Ta).Cited by:   Reactive DC magnetron sputtering was used to make oxide films based on Ni, NiV , NiAl , NiMg , and NiV Mg All of these films were capable of showing electrochromism in KOH. The addition of Al or Mg increased the luminous transmittance significantly, while the charge capacity was by:   Other advantages of mixed oxides is the possibility to widen the optical band gap in order to provide higher bleached-state transmittance in nickel-oxide-based and iridium-oxide-based films and to dilute expensive iridium oxide films without major changes of the electrochromism,,,.Cited by: Electrochromism occurs in some oxides that can serve as mixed conductors for electrons and ions (Granqvist, ).Tungsten oxide is a particularly well-known electrochromic material whose atomic arrangement is shown in Figure This oxide consists of corner-sharing octahedral building blocks, each with a centrally positioned tungsten atom surrounded by six oxygen atoms so that the overall.

Nonstoichiometric nickel oxide films were made by reactive dc magnetron sputtering. Subsequent electrochemical treatment in KOH established electrochromism. The material was studied by combined mechanical and optical measurements during electrochemical cycling, spectral infrared reflectance, XPS, and X-ray diffraction. Electrochromism may be defined as the phenomenon that gives rise to a reversible color change by the electrochemical insertion and extraction of electrons and ions into inorganic materials, for example, tungsten oxide (WO 3). The difference in the transmittance between the colored (written) state and the fully bleached (unwritten) state.   Reactive DC magnetron sputtering was used to grow thin films of Ni (93%)-V (7%) oxide and Ni (62%)-Al (38%) oxide. Both films showed electrochromism in KOH. The addition of Al diminished the luminous absorbance significantly, while the charge capacity was maintained. The Al-containing films are superior to the conventional Ni oxide electrodes as regards applications requiring . Electrochromism - Fundamentals and Applications is the first in-depth treatise on the topic. Written by leading scientists in the field, it is a state-of-the-art account of all aspects of electrochromism, presented at a level accessible to chemists, physicists, materials scientists and engineers.

Electrochromic materials are able to change their optical properties in a persistent and reversible way under the action of a voltage pulse. This book explores electrochromism among the metal oxides, with detailed discussions of materials preparation (primarily by thin film technology), materials characterization by (electro)chemical and physical techniques, optical properties, electrochromic 5/5(1). Electrochromism and Electrochromic Devices - by Paul Monk November The electrochromism in the nickel oxide materials arises from the reversible formation of hole states on the NiO6 units, which then impacts the Ni oxidation state through the Ni3d-O2p. based on oxides of W and Ni, as has been the case for the last two decades. Section discusses optical and electronic properties in electrochromic oxides from a general perspective, and Section treats these properties in detail for the most widely used electrochromic material, that is, W oxide.