Smart Windows with Different Thicknesses of V2O5 as Ion Storage Layers

Abstract:

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Smart windows were fabricated with different thicknesses of amorphous V2O5, which acts as an ion storage layer. In these devices, V2O5 was deposited by thermal evaporation at a substrate temperature of 200 oC, and an electrochromic layer (WO3) was deposited by electron beam evaporation at a substrate temperature of 250 oC. Both layers were amorphous. V2O5 was found to exhibit direct-forbidden electron transitions, whereas the WO3 layer exhibited indirect-allowed electron transitions. An increase in the thickness of V2O5 from 78 nm to 313 nm reduced the colouration efficiency from 64 to 48 cm2/C, and the time of the transmission variation curve from the coloured state to the bleached state was increased from 82.41 s to 558 s.

Info:

Periodical:

Materials Science Forum (Volumes 663-665)

Edited by:

Yuan Ming Huang

Pages:

743-750

DOI:

10.4028/www.scientific.net/MSF.663-665.743

Citation:

S. N. Alamri and A. A. Joraid, "Smart Windows with Different Thicknesses of V2O5 as Ion Storage Layers", Materials Science Forum, Vols. 663-665, pp. 743-750, 2011

Online since:

November 2010

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Price:

$35.00

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