期刊
ELECTROCHIMICA ACTA
卷 278, 期 -, 页码 263-270出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2018.05.033
关键词
Eu doped WO3 film; Electrochromic; Photoluminescent; pH; Hydrothermal method
资金
- National Natural Science Foundation of China [21774114, 51503193]
- National Key R&D Program of China [2017YFA0403403]
Eu ions doped WO3 (Eu-WO3) film is demonstrated to possess electrochromic switching and tunable red emission. The effect of pH on structure, morphology, electrochromic and photoluminescent performances of Eu-WO3 film, prepared by hydrothermal method, has been systematically investigated for the first time in this work. We found that as pH increases, a new phase of monoclinic W17O47 crystal and an open porous morphology appear. Electrochromic and photoluminescent properties of Eu-WO3 film could be modulated by tuning pH. On one hand, Eu-WO3 film achieves the maximum transmission modulation of 70.1% and high coloration efficiency of about 55.95 cm(2) C-1 (680 nm) at pH 2.2. On the other hand, red emission of Eu-WO3 film is tunable as a response to external potential and its intensity is proved to be enhanced by increasing pH. (C) 2018 Elsevier Ltd. All rights reserved.
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