Journal
SOLAR ENERGY MATERIALS AND SOLAR CELLS
Volume 117, Issue -, Pages 231-238Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.solmat.2013.05.049
Keywords
Electrochromism; Titanium dioxide; Tungsten trioxide; Core/shell structure; Nanorod array
Funding
- Key Science and Technology Innovation Team of Zhejiang Province [2010R50013]
- Ministry of Education of China
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TiO2@WO3 core/shell nanorod arrays are prepared by the combination of hydrothermal and electrodeposition method. The array films show remarkable enhancement of the electrochromic properties. In particular, a significant optical modulation (57.2% at 750 nm, 70.3% at 1800 nm and 38.4% at 10 mu m), fast switching speed (2.4 s and 1.6 s), high coloration efficiency (67.5 cm(2) C-1 at 750 nm) and excellent cycling performance (65.1% after 10,000 cycles) are achieved for the core/shell nanorod arrays. The improved electrochromic properties are mainly attributed to the core/shell structure and the porous space among the nanorod array, which makes the ion diffusion become easier and it also gives larger surface area for charge-transfer reactions. The data present great promise for the TiO2@WO3 core/shell nanorod arrays as practical electrochromic materials. (C) 2013 Elsevier B.V. All rights reserved.
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