Solid state electrochromic switchable window glazings
Multilayer, solid state electrochromic coatings based on a-WO/sub 3/ (amorphous WO/sub 3/) have been tested. A typical coating on glass consists of indium-tin oxide (520 nm), WO/sub 3/ (410 nm), MgF/sub 2/ (170 nm) and gold (15 nm) all deposited by vacuum evaporation. Optical spectra and solar weighted, integrated transmission values are given for the component films and complete multilayer devices. Electrical characterisitcs and electrooptic responses are reported. Devices with MgF/sub 2/ layers deposited at low pressures have high internal resistances and exhibit long term optical term memories suitable for diurnal switching. The replacement of the gold electrode layer with an indium-tin oxide layer greatly increases the transmittance of the electrochromic coating stack (from solar weighted transmission of 22% to 53%). Electrochromic coatings have promise for solar gain control windows, but further improvements in optical and electrical efficiencies are needed.
- Research Organization:
- Solar Energy Research Inst., Golden, CO (USA)
- DOE Contract Number:
- AC02-83CH10093
- OSTI ID:
- 6149378
- Report Number(s):
- SERI/TP-255-2455; CONF-840872-32; ON: DE85000513
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
140901* -- Solar Thermal Utilization-- Space Heating & Cooling
141000 -- Solar Collectors & Concentrators
ALKALINE EARTH METAL COMPOUNDS
CHALCOGENIDES
ELECTRO-OPTICAL EFFECTS
FLUORIDES
FLUORINE COMPOUNDS
GLAZING MATERIALS
HALIDES
HALOGEN COMPOUNDS
INDIUM COMPOUNDS
INDIUM OXIDES
MAGNESIUM COMPOUNDS
MAGNESIUM FLUORIDES
MATERIALS
OPENINGS
OXIDES
OXYGEN COMPOUNDS
REFRACTORY METAL COMPOUNDS
TIN COMPOUNDS
TIN OXIDES
TRANSITION ELEMENT COMPOUNDS
TUNGSTEN COMPOUNDS
TUNGSTEN OXIDES
WINDOWS