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Number of results

Journal

2005 | 3 | 3 | 456-466

Article title

Structural and optical properties of WO3 electrochromic layers prepared by the sol-gel method

Content

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Languages of publication

EN

Abstracts

EN
Thin layers of tungsten trioxide have been prepared from an aqueous solution of peroxotungstic acid (PTA) using the sol-gel method. Compositional, structural and optical characteristics of WO3 coated on indium tin oxide (ITO) conductive glass substrates were studied using X-ray diffractometery (XRD), cyclic voltammetery (CV), scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDX). Monoclinic and triclinic crystalline structures for thin film and powdered WO3 were confirmed by XRD analysis. SEM micrograph of annealed samples revealed micro cracks due to a decrease in density and a contraction of layers. EDX analysis showed that 1∶2 ratio of oxygen and tungsten atoms in the prepared films is obtained at heat treatment temperatures higher than 200 °C. Furthermore, the annealed samples showed very good electrochromic behavior in cyclic voltammetery studies. Refractive index “n” and extinction coefficient “k” values were found to be reduced by increasing the wavelength and decreasing the temperature.

Publisher

Journal

Year

Volume

3

Issue

3

Pages

456-466

Physical description

Dates

published
1 - 9 - 2005
online
1 - 9 - 2005

Contributors

  • Material and Ion Beam Application Division, Nuclear Research Center for Agriculture and Medicine, Atomic Energy Organization of Iran (AEOI), P.O. Box, 31485-498, Karaj, Iran
  • Material and Ion Beam Application Division, Nuclear Research Center for Agriculture and Medicine, Atomic Energy Organization of Iran (AEOI), P.O. Box, 31485-498, Karaj, Iran
  • Material and Ion Beam Application Division, Nuclear Research Center for Agriculture and Medicine, Atomic Energy Organization of Iran (AEOI), P.O. Box, 31485-498, Karaj, Iran

References

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  • [2] P.K. Varshney, Nidhi, R. Ramachandran and S.A. Agnihotory: “Colloidal tungstic oxide films for electrochromic applications: preliminary studies”, Ind. J. Pure & Appl. Phys., Vol. 37, (1999), pp. 262–265.
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  • [7] K.D. Lee: “Preparation and electrochromic properties of WO3 coating deposition by the sol-gel method”, Sol. Energy Mater & Sol. Cells, Vol. 57, (1999), pp. 21–30. http://dx.doi.org/10.1016/S0927-0248(98)00162-7[Crossref]
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  • [11] K.D. Lee: “Deposition of WO3 thin films by the sol-gel method”, Thin Solid Films, Vol. 302, (1997), pp. 84–88. http://dx.doi.org/10.1016/S0040-6090(96)09556-9[Crossref]
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Document Type

Publication order reference

Identifiers

YADDA identifier

bwmeta1.element.-psjd-doi-10_2478_BF02475650
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