Thickness-dependent Electrochromic Properties of Amorphous Tungsten Trioxide Thin Films

Автор(ы) K.J. Patel1 , G.G. Bhatt1 , S.S. Patel2, R.R. Desai2, J.R. Ray3, C.J. Panchal4 , Priya Suryavanshi4, V.A. Kheraj5, A.S. Opanasyuk6

1 BITS Edu Campus, Varnama, Vadodara, Gujarat, India

2 Sardar Patel University, Vallabh Vidyanagar-388120, Gujarat, India

3 H. V. H. P. Institute of P.G. Studies and Research, Kadi Sarva Vishwavidyalaya, Kadi, Gujarat, India

4 The M. S. University of Baroda, Vadodara-390001, India

5 S. V. National Institute of Technology, Surat 395007, India

6 Sumy State University, 2, Rymskyi-Korsakov Str., 40007 Sumy, Ukraine

Выпуск Том 9, Год 2017, Номер 3
Даты Получено 28.04.2017, в отредактированной форме – 04.05.2017, опубликовано online – 30.06.2017
Ссылка K.J. Patel, G.G. Bhatt, S.S. Patel, et al., J. Nano- Electron. Phys. 9 No 3, 03040 (2017)
DOI 10.21272/jnep.9(3).03040
PACS Number(s) 73.61.Jc, 78.20.Jq
Ключевые слова Electrochromic (4) , Thermal evaporation (10) , Tungsten trioxide.
Аннотация Tungsten Trioxide (WO3) thin films were grown by thermal evaporation method to study the effect of film’s thickness on its electrochromic (EC) properties. The WO3 thin films of different thicknesses were grown on Indium Tin Oxide (ITO) coated glass and soda lime (bare) glass substrate held at room temperature. The surface composition of the thin films was investigated using X-ray photoelectron spectroscopy measurement, which showed the oxygen to tungsten atomic composition ratio to be nearly 2.97. The EC properties of the thin films were examined using electrochemical techniques. Cyclic-voltammetery shows the diffusion coefficient (D) of the intercalated H+ ion in the WO3 thin film increases with the film’s thickness. It turns out that the ‘thicker’ film exhibits better coloration efficiency (CE) as compared to the ‘thinner’ film. The coloration time was found to be independent of film thickness; however, the bleaching time increases as the film thickness increases.

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