期刊
OPTICAL MATERIALS
卷 122, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.optmat.2021.111744
关键词
Electrochromism; TiO2 films; Solvothermal method; Ethanol content; Porous structure; Cyclic stability
资金
- NUPTSF [NY221027, NY221028, NY219139]
- National Natural Science Foundation of China [12004194]
The study investigated the influence of ethanol content on the microstructure and electrochromic performance of TiO2 films. Results showed that the film synthesized with 20% ethanol had the highest transmittance modulation, fastest switching times, largest coloration efficiency, and high cyclic stability.
The TiO2 films are directly prepared on FTO-coated substrates by a facile solvothermal method. The influence of ethanol content in precursor on the microstructure and electrochromic performance of TiO2 films is studied. The X-Ray diffraction result shows that the prepared TiO2 samples are crystalline. When the ethanol contents of 20% and 30%, the TiO2 films show (010) preferred orientation and fluffy porous structure. Analysis results of electrochromic performance indicate that the TiO2 film synthesized with the ethanol content of 20% exhibits the highest transmittance modulation (Delta T-780 (nm) = 75.4%), the fastest switching times (bleaching time: 8.9 s, coloration time: 12.2 s) and the largest coloration efficiency (CE = 78 cm(2)/C). In addition, the cyclic voltammetry measurements confirm that the film synthesized with the ethanol content of 20% exhibits high cyclic stability (1000 cycles).
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