Solid-state electrochromic switchable window glazings, FY 1984 progress report

Technical Report · Tue Apr 01 04:00:00 EST 1986

OSTI ID:5536758

Benson, D K; Tracy, C E; Ruth, M R

Multilayer, solid-state electrochromic coatings have been prepared and characterized. The electrochromic activity is based on hydrogen-ion insertion into a microcrystalline tungsten oxide (H/sub x/WO/sub y/) layer from a hydrated microcrystalline magnesium fluoride layer. The coatings typically consist of four layers deposited sequentially onto glass: transparent conductor (tin-doped indium oxide, ITO) 330 nm; electrochromic material (H/sub x/WO/sub y/) 500 nm; hydrated fast-ion conductor/electron current blocking layer (MgF/sub 2/) 100 nm; and transparent conductor (gold) 13 nm. Solar-weighted and photopic-weighted optical properties are reported for individual layers and complete multilayer coatings. The electrooptic response of complete solid-state coatings is also reported. Maximum transmittance through the four layer coatings with gold conductive layers was limited to 32% solar and 56% visible. Replacing the gold conductive layer with a tin-doped indium oxide layer increased the maximum transmittance to 59% solar and 64% visible but impaired the electrochromic response. Large area coatings were fabricated (700 cm/sup 2/) and shown to operate in the same manner as the 12 cm/sup 2/ test specimens. Preliminary analyses were made of possible production costs and possible energy savings benefits which would be derived from optimal use of such switchable window coatings.

• Research Organization: Solar Energy Research Inst., Golden, CO (USA)
• DOE Contract Number: AC02-83CH10093
• OSTI ID: 5536758
• Report Number(s): SERI/PR-255-2627; ON: DE86004455
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
320100* -- Energy Conservation
Consumption
& Utilization-- Buildings
ALKALINE EARTH METAL COMPOUNDS
CHALCOGENIDES
COVERINGS
ELECTRO-OPTICAL EFFECTS
ELECTROCHROMISM
FLUORIDES
FLUORINE COMPOUNDS
GLAZING
HALIDES
HALOGEN COMPOUNDS
MAGNESIUM COMPOUNDS
MAGNESIUM FLUORIDES
OPENINGS
OXIDES
OXYGEN COMPOUNDS
REFRACTORY METAL COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
TUNGSTEN COMPOUNDS
TUNGSTEN OXIDES
WINDOWS