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Synergistic effects of Ti-doping induced porous networks on electrochromic performance of WO3 films.
- Source :
- Journal of Materials Chemistry C; 12/28/2020, Vol. 8 Issue 48, p17245-17253, 9p
- Publication Year :
- 2020
-
Abstract
- In this study, amorphous Ti-doped WO<subscript>3</subscript> films with interpenetrated porous networks were successfully fabricated via a facile sol–gel method by using a hydrolysis-tolerant titanium coupling agent (TCA) as a Ti-dopant. We found that the TCA played multiple roles in forming electrochromic WO<subscript>3</subscript> films. First, introducing a TCA into an acetylated peroxotungstic acid (A-PTA) precursor sol was found to prolong the shelf life, which is crucial for practical application. Second, the TCA also acted as a pore-forming agent to form an inter-penetrated porous network in the resultant amorphous WO<subscript>3</subscript> films by annealing at 250 °C. Finally, the TCA generated a higher degree of oxygen vacancy in WO<subscript>3</subscript> films than that in pure WO<subscript>3</subscript> films. Combining all these properties, 8 wt% TCA-doped WO<subscript>3</subscript> films exhibit much larger optical contrast, a faster switching speed and a higher coloration efficiency compared with the corresponding neat WO<subscript>3</subscript> film. The superior electrochromic performances of the TCA-doped WO<subscript>3</subscript> film were attributed to the synergistic effects of the porous structure and oxygen vacancies on the WO<subscript>3</subscript> film, which facilitate the charge-transfer and promote the electrolyte infiltration. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 20507526
- Volume :
- 8
- Issue :
- 48
- Database :
- Complementary Index
- Journal :
- Journal of Materials Chemistry C
- Publication Type :
- Academic Journal
- Accession number :
- 147754855
- Full Text :
- https://doi.org/10.1039/d0tc04420b