An electrochromic Li{sub x}WO{sub 3}/polymer laminate/Li{sub y}V{sub 2}O{sub 5} device

Conference · Mon Dec 31 04:00:00 EST 1990

OSTI ID:86097

Andersson, A M; Granqvist, C G ^[1]; Stevens, J R ^[2]

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1. Chalmers Univ. of Technology, Gothenburg (Sweden). Physics Dept.
2. Univ. of Guelph, Ontario (Canada). Physics Dept.

The authors describe recent research aimed at developing an all-solid-state smart window for energy-efficient buildings. The basic concept is to connect two pieces of glass, with complementary electrochromic coatings, by a transparent polymeric ion conductor which serves also as a lamination material. This Chapter reports data on the components of one specific design of this type, as well as some initial device results. The authors discuss the fabrication of thin films of WO{sub 3} and V{sub 2}O{sub 5} by different physical vapor deposition techniques, including dc and rf-sputtering as well as e-beam evaporation. They also outline a method for making a transparent solid polymer electrolyte based on a methyl methacrylate network incorporating poly (propylene glycol) complexed with lithium perchlorate. They discusses the properties of the various individual layers. They treat electrochemical characterization of the thin films in contact with liquid electrolytes and point at the large capacity of V{sub 2}O{sub 5} to accommodate lithium ions. They also present optical transmittance spectra which show that WO{sub 3} has pronounced electrochromism, and that the polymer electrolyte is almost transparent for solar radiation. Finally some initial results on devices with a laminated configuration are given. Specifically, they studied systems incorporating an electrochromic Li{sub x}WO{sub 3} layer and a Li{sub y}V{sub 2}O{sub 5} counter electrode. They found optical modulation between widely separated extrema with this combination of materials.

• OSTI ID: 86097
• Report Number(s): CONF-8809123--; ISBN 0-8194-0069-6
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
BUILDINGS
DESIGN
ELECTRICAL PROPERTIES
ELECTROCHROMISM
ELECTROLYTES
GLAZING MATERIALS
LAYERS
LITHIUM OXIDES
OPTICAL PROPERTIES
TUNGSTEN OXIDES
VANADIUM OXIDES
WINDOWS