Synthesis and Characterization of Potentiostatically Electrodeposited Tungsten Oxide Thin Films for Smart Window Application

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• 作者：A. J. More ; R. S. Patil ; D. S. Dalavi ; M. P. Suryawanshi…
• 关键词：Thin film ; tungsten oxide ; electrodeposition ; electrochromism
• 刊名：Journal of Electronic Materials
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：46
• 期：2
• 页码：974-981
• 全文大小：
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Optical and Electronic Materials; Characterization and Evaluation of Materials; Electronics and Microelectronics, Instrumentation; Solid State Physics;
• 出版者：Springer US
• ISSN：1543-186X
• 卷排序：46

文摘

Tungsten oxide (WO₃) thin films have been synthesized using electrodeposition in potentiostatic mode and the effect of different deposition potentials on their structural, morphological, optical, and electrochromic (EC) properties investigated. The deposition potential versus saturated calomel electrode (SCE) was varied from −0.35 V to −0.50 V in steps of −0.05 V for 20 min each. The electrodeposited WO₃ thin films were characterized using x-ray diffraction analysis, micro-Raman spectroscopy, field-emission scanning electron microscopy, and ultraviolet–visible (UV–Vis) spectrophotometry, revealing amorphous nature with nanograins having average size from 40 nm to 60 nm. The EC performance of the WO₃ thin films exhibited response times of 1.35 s for bleaching (t_b) and 3.1 s for coloration (t_c) with excellent reversibility of 64.36%. The highest coloration efficiency of the electrodeposited WO₃ thin films was found to be 87.95 cm2/C. The electrochemical reversibility and stability of the WO₃ thin films obtained in this study make them promising for use in smart window applications.