- Title
- Tuning Phase Transition and Thermochromic Properties of Vanadium Dioxide Thin Films via Cobalt Doping
- Creator
- Geng, Xun; Chang, Tianci; Yang, Jack; Cheng, Zhenxiang; Kalantar-Zadeh, Kourosh; Cao, Xun; Wang, Danyang; Vinu, Ajayan; Yi, Jiabao; Wu, Tom; Fan, Jiaxin; Wang, Yu; Wang, Xiaotian; Sun, Yunlong; Selvarajan, Premkumar; Liu, Chuang; Lin, Chun-Ho; Wang, Xiaolin
- Relation
- ARC.FT180100541 http://purl.org/au-research/grants/arc/FT180100541
- Relation
- ACS Applied Materials & Interfaces Vol. 14, Issue 17, p. 19736-19746
- Publisher Link
- http://dx.doi.org/10.1021/acsami.2c03113
- Publisher
- American Chemical Society
- Resource Type
- journal article
- Date
- 2022
- Description
- Vanadium dioxide (VO2) featuring a distinct thermally triggered phase transition is regarded as the most attractive thermochromic material for smart window applications. However, the high transition temperature (∼67°C) and moderate luminous transmittance (<50%) of the pristine VO2circumvent room temperature applications. In this work, epitaxial cobalt-doped VO2thinfilms were fabricated to tailor the electric and optical properties on ac-plane sapphire substrate. At the highest doping concentration of 10%, the transition temperature of VO2is reduced to 44°C, accompanied by a high luminous transmittance of 79% for single-element Co-doped VO2. The roles of cobalt doping and detailed band variation are fully explained experimentally and by modeling(DFT calculation), respectively. Furthermore, the dramatically increased carrier concentration in cobalt-doped VO2underscores the promising future of cobalt-doped VO2unveiled by temperature-dependent Hall effect measurement.
- Subject
- vanadium dioxide; cobalt doping; Raman spectroscopy; phase transition; luminous transmittance
- Identifier
- http://hdl.handle.net/1959.13/1485809
- Identifier
- uon:51702
- Identifier
- ISSN:1944-8244
- Language
- eng
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