Internal electrochromism in vanadium pentoxide xerogel films

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• 作者：D. Yakovleva ; A. Pergament ; ^{aperg@psu.karelia.ru" class="auth_mail" title="E-mail the corresponding author} ; O. Berezina ; P. Boriskov ; D. Kirienko ; V. Pikulev
• 关键词：Vanadium pentoxide ; Sol&ndash ; gel ; Ionic conductivity ; Electrochromism ; Chemical bonds
• 刊名：Materials Science in Semiconductor Processing
• 出版年：2016
• 出版时间：15 March 2016
• 年：2016
• 卷：44
• 期：Complete
• 页码：78-84
• 全文大小：2990 K

文摘

We describe the internal electrochromic effect in V₂O₅ xerogel films caused by the redistribution of hydrogen ions inside the film, instead of insertion from the outside, i.e. from an electrolyte, as in the case of conventional electrochromism. A hypothesis is put forward according to which the mechanism of this electrochromic effect is associated with formation of red-colored hexa- and (or) deca-vanadic acid inclusions inside the vanadium pentoxide layers. This model is supported by the calculated data of energy characteristics of V–O chemical bonds in V₂O₅ octahedra layers of xerogel, as well as by the experimental results of XRD, FTIR, and optical spectroscopy.