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|Title:||Development of electrochromic smart windows by sol-gel techniques|
Schmidt, Helmut K.
|Year of Publication:||1997|
|OPUS Source:||Sol-gel optics IV : 30 July-1 August 1997, San Diego, California / Bruce S. Dunn ... [et al.], chairs/editors. - Bellingham, Wash. : SPIE, c1997. - (SPIE proceedings series ; 3136), S. 470-479|
|SWD key words:||Sol-Gel-Verfahren|
|DDC notations:||620 Engineering and machine engineering|
|Publikation type:||Conference Paper|
|Abstract:||A novel nanocomposite lithium ion-conducting electrolyte has been developed, based on organically modified silanes, which is suitable for application in a sol-gel electrochromic system. The system developed consists of FTO-coated (Fluorine doped Tin Oxide) glass coated with tungsten oxide, WO3, at one side of the device as the electrochromic layer, with a cerium oxide-titanium oxide layer, CeO2-TiO2, acting as ion-storage layer or counter electrode. The adhesive properties of the electrolyte enabled the manufacture of electrochromic devices in a laminated structure: glassFTOWO3 anocomp.elect.CeO2-TiO2FTOglass. The conductivity of the nanocomposite electrolyte system varies between 10-4 and 10-5 Scm-1 at 25°C depending on the exact composition. The temperature dependence of the conductivity exhibits typical Vogel-Tamman-Fulcher (VTF) behaviour. The thickness of the electrolyte between the two halves of the device could be adjusted by the use of a spacer technique in the range 10 - 150 µm. Optoelectrochemical measurements were conducted on electrochromic devices to study the kinetics of colouration and bleaching as a function of the number of switching cycles. At present, cells are constructed in two formats:10 X 15 cm2 and 35 X 35 cm2. Switching times under one minute were achieved for the smaller format with a corresponding optical modulation between 75% to 20% (at λ = 0.633 µm). In the case of the larger format the switching time increases to several minutes due to the increase in geometric area.|
|Link to this record:||urn:nbn:de:bsz:291-scidok-28513|
|Date of registration:||6-May-2010|
|Faculty:||SE - Sonstige Einrichtungen|
|Department:||SE - INM Leibniz-Institut für Neue Materialien|
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