Highly stable electrochromic cells based on amorphous tungsten oxides prepared using a solution-annealing process
- Authors
- Nguyen, Tuan Van; Huynh, Kim Anh; Le Quyet Van; Kim, Hayeong; Ahn, Sang Hyun; Kim, Soo Young
- Issue Date
- 4월-2021
- Publisher
- WILEY
- Keywords
- amorphous; annealing; electrochromic; smart window; sol& #8211; gel; tungsten oxide
- Citation
- INTERNATIONAL JOURNAL OF ENERGY RESEARCH, v.45, no.5, pp.8061 - 8072
- Indexed
- SCIE
SCOPUS
- Journal Title
- INTERNATIONAL JOURNAL OF ENERGY RESEARCH
- Volume
- 45
- Number
- 5
- Start Page
- 8061
- End Page
- 8072
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/128363
- DOI
- 10.1002/er.6354
- ISSN
- 0363-907X
- Abstract
- In this work, a facile sol-gel and annealing technique was employed to prepare amorphous electrochromic tungsten oxide thin films at a relatively low temperature. Specifically, ammonium metatungstate hydrate was blended in dimethylformamide and was used as the precursor for obtaining highly uniform and transparent amorphous WOx by simple spin-coating and calcining in ambient air at 250 degrees C for 2 hours. The film exhibits an unprecedented stability over 4000 operational cycles with a high coloration efficiency of 125 cm(2) C-1 and fast switching times of 5 seconds for the colored state and 2.5 seconds for the bleaching state. Therefore, the prepared amorphous tungsten oxide film is a prominent material for the next generation of electrochromic devices that can be used in smart windows and electronic display devices.
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Collections - College of Engineering > Department of Materials Science and Engineering > 1. Journal Articles
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