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Microstructural Control of the Electrochromic and Ion Storage Layers on the Performance of an Electrochromic Device Fabricated by the Kinetic Spray Technique

Authors
  • Kim, Hyungsub1
  • Kim, Kwangmin1
  • Choi, Dahyun1
  • Lee, Minji1
  • Chu, Won-Shik2
  • Ahn, Sung-Hoon2
  • Chun, Doo-Man3
  • Lee, Caroline Sunyong1
  • 1 Hanyang University, Department of Materials Engineering, 5th Engineering Building, 55, Hanyangdaehak-ro, Sangrok-gu, Ansan-si, Gyeonggi-do, 15588, Republic of Korea , Gyeonggi-do (South Korea)
  • 2 Seoul National University, Department of Mechanical and Aerospace Engineering, 1, Gwanak-ro, Gwanak-gu, Seoul, 08826, Republic of Korea , Seoul (South Korea)
  • 3 University of Ulsan, School of Mechanical Engineering, 93, Daehak-ro, Nam-gu., Ulsan, 44610, Republic of Korea , Ulsan (South Korea)
Type
Published Article
Journal
International Journal of Precision Engineering and Manufacturing-Green Technology
Publisher
Korean Society for Precision Engineering
Publication Date
Apr 20, 2018
Volume
5
Issue
2
Pages
231–238
Identifiers
DOI: 10.1007/s40684-018-0023-8
Source
Springer Nature
Keywords
License
Yellow

Abstract

WO3 electrochromic (EC) and ATO ion storage films were fabricated by a kinetic spray technique at various substrate heating temperatures. The optimal heating condition for WO3 deposition was 80oC, which provided a total transmittance change of 31%. Furthermore, the total transmittance change (at 800 nm) of the WO3 EC cell fabricated with the ATO ion storage layer deposited at 150°C was 42%, which was caused a comparably large shift in the transmittance. The charge/discharge density of the EC cell with the ATO ion storage layer deposited at 150°C was 11.12-11.37 mC cm-2. Finally, the cyclic transmittance of 40% was maintained for 1 h. The uniform and densely packed microstructure that resulted from the heated substrate had good inter-grain and particles connections that provided sufficient absorption sites for ions. Therefore, it was established that microstructural control of the EC and ion storage layers are crucial to improving EC performance.

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