Towards electrochromic stability in sol-gel-derived tungsten oxide films: cyclic voltammetric and spectrophotometric investigations

被引：15

作者：

Agnihotry, SA ^{[1
]}

Sharma, R ^{[1
]}

Kar, M ^{[1
]}

Saxena, TK ^{[1
]}

机构：

[1] Natl Phys Lab, Elect Mat Div, New Delhi 110012, India

来源：

SOLAR ENERGY MATERIALS AND SOLAR CELLS | 2006年 / 90卷 / 01期

关键词：

sol-gel; tungsten oxide; cyclic voltammetry; electrochromic; coloration efficiency; stoichiometry;

D O I：

10.1016/j.solmat.2005.01.006

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

Hitherto unexplored irreversible changes during initial coloration/bleaching cycles for sol-gel-derived tungsten oxide (WO3) films have been investigated using cyclic voltammetric and spectrophotometric techniques. Non-ideal features appearing in the initial five anodic (deintercalation) cycles in the voltammogram with simultaneous decreased optical transmission of the bleached films have been explained in terms of possible stoichiometric variations affecting the coloration efficiency (CE) of the films and the associated mechanisms. Electrochromic stability attained thereafter manifests in retraceable voltammograms and almost invariant value of the CE. (C) 2005 Elsevier B.V. All rights reserved.

引用

页码：15 / 24

页数：10

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