期刊
ELECTROCHIMICA ACTA
卷 102, 期 -, 页码 358-368出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2013.03.123
关键词
WO3/Ag composite thin films; Ag2WO4; SPR; Electrochromism; CIE coordinates
资金
- University Grants Commission (UGC), New Delhi
- Human Resource Development (HRD) Group, Council of Scientific and Industrial Research (CSIR), New Delhi
- Human Resource Development of the Korea Institute of Energy technology Evaluation and Planning (KETEP) grant
- Korea Government Ministry of knowledge Economy [20124010203180]
WO3/Ag composite thin films were prepared by microwave assisted sol-gel synthesis (MW-SGS) of WO3 followed by vacuum evaporation of Ag nanoparticles and their enhanced electrochromic coloration was investigated. The composition and morphology of WO3 thin films with different thickness of Ag layer obtained by vacuum evaporation were investigated. Distinct plasmon absorption bands of Ag nanoparticle thin films were obtained. The optical band gap energy of WO3/Ag films decreased with increasing the Ag layer thickness. The surface of these films has been examined using X-ray photoelectron spectroscopy (XPS) to gain information about the chemical states of species present at surfaces. Experimental results indicated that the conductivity of the films increased after surface modification by Ag layer. To investigate the origin of enhanced electrochromic absorption in optical properties, working electrode consisting of WO3/Ag thin film was used and observed the optical properties during electrochemical reaction. It was found that composite electrode shows enhancement in electrochromic properties in terms of optical modulation (Delta OD) and coloration efficiency (eta). (C) 2013 Elsevier Ltd. All rights reserved.
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