Jump to main content
Jump to site search

Issue 40, 2020
Previous Article Next Article

Self-doped tungsten oxide films induced by in situ carbothermal reduction for high performance electrochromic devices

Author affiliations

Abstract

As a promising electrochromic material, tungsten oxide is of great value for applications in smart windows and energy saving displays. Fabricating high performance tungsten oxide by the cost-effective way is immensely in demand for promoting the large-scale application. Herein, we demonstrate a green and economic route in developing self-doped tungsten oxide (WO3−x) films. Through the precursor design and carbonization process, amorphous carbon can be obtained and used as an in situ reducing agent. Then, oxygen vacancies and nanopores were generated in WO3−x films by carbothermal reduction during annealing. The self-doping WO3−x film exhibits a remarkable optical modulation (∼70% at 680 nm) in both visible and near infrared bands. The electrochromic switching behavior of the WO3−x film shows a fast response speed (7 s for coloring and 15 s for bleaching), a high coloration efficiency up to 62 cm2 C−1 and a good cycling stability. The enhanced electrochromic properties are attributed to the large specific surface area and oxygen vacancies which facilitate the ion insertion and extraction at the interface. This work offers a highly active electrochromic material as well as an ingenious synthesis strategy for numerous oxygen deficient functional oxides.

Graphical abstract: Self-doped tungsten oxide films induced by in situ carbothermal reduction for high performance electrochromic devices

Back to tab navigation

Article information


Submitted
01 Jul 2020
Accepted
12 Aug 2020
First published
13 Aug 2020

J. Mater. Chem. C, 2020,8, 13999-14006
Article type
Paper

Self-doped tungsten oxide films induced by in situ carbothermal reduction for high performance electrochromic devices

L. Zhou, P. Wei, H. Fang, W. Wu, L. Wu and H. Wang, J. Mater. Chem. C, 2020, 8, 13999
DOI: 10.1039/D0TC03103H

Social activity

Search articles by author

Spotlight

Advertisements