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Study of electrochromic characteristics in the near-infrared region of electrochromic devices based on solution-processed amorphous WO3 films.
- Source :
-
Materials Science in Semiconductor Processing . Dec2018, Vol. 88, p73-78. 6p. - Publication Year :
- 2018
-
Abstract
- Abstract In this paper, tungsten oxide (WO 3 ) thin films and hybrid polyelectrolyte have been synthesized by solution-based processes to form solid-state electrochromic devices (ECDs). Electrochromic properties of the ECDs have been investigated, focusing on the near-infrared (NIR) region of the light spectrum. By optimizing the applied impulse voltage and WO 3 film thickness, a coloration efficiency of 78.8 cm2/C has been achieved in the ECD under the impulse voltage of ± 2.5 V. In addition, at the same voltage, the response time of 2.5 s and 15.8 s was obtained for bleaching and coloring, respectively. The fast switching between colored and bleached states is due to the porous structure of solution-processed WO 3 films that facilitates injection/release of Li ions. Stable current-time profiles have been obtained during cyclic measurements with alternating impulse voltages within 6 × 103 s, indicating excellent reversibility in the ECDs. The solid-state ECDs based on WO 3 films are promising to be used in applications requiring NIR-related optical modulation such as smart windows. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 13698001
- Volume :
- 88
- Database :
- Academic Search Index
- Journal :
- Materials Science in Semiconductor Processing
- Publication Type :
- Academic Journal
- Accession number :
- 131592326
- Full Text :
- https://doi.org/10.1016/j.mssp.2018.07.034