Tuning Phase Transition and Thermochromic Properties of Vanadium Dioxide Thin Films via Cobalt Doping
Source abstract
Abstract
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 VO2 circumvent room temperature applications. In this work, epitaxial cobalt-doped VO2 thin films were fabricated to tailor the electric and optical properties on a c-plane sapphire substrate. At the highest doping concentration of 10%, the transition temperature of VO2 is 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 VO2 underscores the promising future of cobalt-doped VO2 unveiled by temperature-dependent Hall effect measurement.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Transition Metal Oxide Nanomaterials · Ga2O3 and related materials · ZnO doping and properties
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
The School of Material Science and Engineering, the University of New South Wales (UNSW), Sydney, 2033, Australia
State Key Laboratory of High-Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Dingxi 1295, Changning, Shanghai, 200050, China
Institute for Superconducting & Electronic Materials (ISEM), Australia Institute for Innovative Materials, Innovation Campus, University of Wollongong, Squires Way, North Wollongong, New South Wales 2500, Australia
Global Innovative Centre for Advanced Nanomaterials, School of Engineering, The University of Newcastle, Callaghan, New South Wales 2308, Australia
The School of Chemical Engineering, University of New South Wales (UNSW), Sydney, New South Wales 2052, Australia
Funding
Australian Research Council · Australian Government · National Natural Science Foundation of China
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