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Matériaux et dispositifs électrochromes à base de NiO modifié en couches minces

Abstract : Electrochromic devices, ECDs, are able to change their optical properties under an applied voltage. In the framework of the European project INNOSHADE, the aim of the current work is the development of neutral color ECDs based on nickel oxide thin films as counter electrode. Ni3+ containing NiO thin films, called modified NiO thin films, were deposited both by Pulsed Laser Deposition and chemical route. When cycled in lithium based electrolyte, the comparison of the EC behavior of non-stoichiometric NiO thin films points out a higher electrochemical capacity associated with a larger optical contrast for the films synthesized by chemical route due in particular to a larger porosity. Highlighting a novel approach, herein we demonstrate faster kinetics for modified NiO thin films cycled in lithium ion free electrolyte and suggest the participation of anions. High electrochromic efficiency and nice durability of all-solid state devices associating modified NiO and WO3 or Poly(3,4 –ethylenedioxythiophene) PEDOT layers are reported.
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Hakim Moulki. Matériaux et dispositifs électrochromes à base de NiO modifié en couches minces. Matériaux. Université Sciences et Technologies - Bordeaux I, 2013. Français. ⟨NNT : 2013BOR14789⟩. ⟨tel-00989588⟩

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