Volume 13, Issue 2 (International Journal of Optics and Photonics (IJOP) Vol 13, No 2, Summer-Fall 2019)                   IJOP 2019, 13(2): 79-88 | Back to browse issues page

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Daroogheh N, Karimi E, Ghorashi S B. Designing and Fabrication of Electrochromic Windows Using Tungsten Oxide Films Prepared Through Sol-gel Coating on a Glass. IJOP 2019; 13 (2) :79-88
URL: http://ijop.ir/article-1-336-en.html
Designing and Fabrication of Electrochromic Windows Using Tungsten Oxide Films Prepared Through Sol-gel Coating on a Glass
Nayyereh Daroogheh1 , Elham Karimi1 , S.M. Bagher Ghorashi *1
1- Department of Physics, Faculty of Physics, University of Kashan
Abstract:   (5444 Views)
In this study, a sol-gel peroxotungstic acid sol was employed to deposit tungsten oxide (WO3) films by the spin-coating technique. In view of smart window applications, electrochromic windows were then designed and fabricated using a thin tungsten oxide film. For this purpose, Glass/ FTO/ WO3/ electrolyte/ FTO/Glass could be of use due to its special structure that consists of an electrochromic layer (WO3) on a transparent conductor (FTO), an electrolyte containing Li+ cations, and a transparent conductor layer. A voltage was applied on the fabricated sample, which was later assesed for its transmission, switching speed, and coloration efficiency. An increase in the coloration efficiency from 87 cm2/C-1 to 99.1 cm2/C-1 was found associated with an increase in the deposition speed. Moreover, the increase in the deposition speed led to a decrease in the coloration and bleaching time duration from 11.4 s to 6.2 s and from 12.8 s to 5.2 s respectively. The results obtained on the thin film WO3 can be useful for electrochromic applications.
Keywords: Electrochromic material, Sol-gel preparation, Tungsten oxide, Coloration.
Full-Text [PDF 587 kb]   (3765 Downloads)    
Type of Study: Research | Subject: General
Received: 2018/03/6 | Revised: 2018/05/29 | Accepted: 2018/09/4 | Published: 2019/12/27
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