Enhanced electrochromic performance of macroporous WO3 films formed by anodic oxidation of DC-sputtered tungsten layers

被引：106

作者：

Zhang, J.

Wang, X. L. ^{[1
]}

Xia, X. H.

Gu, C. D.

Zhao, Z. J.

Tu, J. P.

机构：

[1] Zhejiang Univ, State Key Lab Silicon Mat, Hangzhou 310027, Peoples R China

来源：

ELECTROCHIMICA ACTA | 2010年 / 55卷 / 23期

关键词：

Tungsten oxide; Thin films; Anodic oxidation; Macroporous structure; Electrochromism; TIO2; NANOTUBES; THIN-FILMS; OXIDE; ANODIZATION; CONTRAST;

D O I：

10.1016/j.electacta.2010.06.082

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Self-organized macroporous tungsten trioxide (WO3) films are obtained by anodic oxidation of DC-sputtered tungsten (W) layers on 10 mm x 25 mm indium tin oxide (ITO)-coated glass. Under optimized experimental conditions, uniformly macroporous WO3 films with a thickness of ca. 350 nm are formed. The film shows a connected network with average pore size of 100 nm and a pore wall thickness of approximately 30 nm. The anodized film becomes transparent after annealing without significant change in macroporous structure. In 0.1 M H2SO4, the macroporous WO3 films show enhanced electrochromic properties with a coloration efficiency of 58 cm(2) C-1. Large modulation of transmittance (similar to 50% at 632.8 nm) and a switching speed of about 8 s are also achieved with this macroporous film. (C) 2010 Elsevier Ltd. All rights reserved.

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页码：6953 / 6958

页数：6

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