期刊
ELECTROCHIMICA ACTA
卷 63, 期 -, 页码 153-160出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2011.12.069
关键词
Electrochromism; Tungsten trioxide; Thin film; Complementary device
资金
- Science and Engineering Research Council, Agency for Science, Technology and Research (A*STAR) of Singapore [092 101 0057, 092 151 0088]
- National Natural Science Foundation of China (NSFC) [61006037, 61076015]
- [NRF-RF-2009-09]
Orthorhombic hydrated tungsten trioxide (3WO(3)center dot H2O) films consisted of nanosticks and nanoparticles were prepared on fluorine doped tin oxide (FTO)-coated substrate by a facile and template-free hydrothermal method using ammonium acetate (CH3COONH4) as the capping agent. Irregular nanobrick films were obtained without capping agent. Due to the highly rough surface, the nanostick/nanoparticle film depicts faster ion intercalation/deintercalation kinetics and a greater coloration efficiency (45.5 cm(2)/C) than the nanobrick film. A complementary electrochromic device based on the nanostick/nanoparticle 3WO(3)-H2O film and Prussian blue (PB) was assembled. As a result, the complementary device shows a higher optical modulation (54% at 754 nm), a larger coloration efficiency (151.9 cm(2)/C) and faster switching responses with a bleaching time of 5.7 s and a coloring time of 1.3 s than a single 3WO(3).H2O layer device, making it attractive for a practical application. (C) 2011 Elsevier Ltd. All rights reserved.
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