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Flexible thermochromic window based on hybridized VO2/graphene.
Hyeongkeun Kim1, Yena Kim, Keun Soo Kim
1Electronic Materials and Device Research Center, Korea Electronics Technology Institute, Gyeonggi-do 463-816, Korea.
Researchers developed flexible thermochromic vanadium dioxide (VO2) films using graphene. These smart window films efficiently modulate light and reduce indoor temperatures, offering energy-saving solutions.
Area of Science:
- Materials Science
- Nanotechnology
- Energy
Background:
- Flexible smart window films require vanadium dioxide (VO2) for light modulation.
- High-temperature VO2 growth hinders its integration on flexible substrates.
Purpose of the Study:
- To develop mechanically flexible VO2-based thermochromic films.
- To enable VO2 integration on plastic substrates for smart windows.
Main Methods:
- Utilized graphene as a flexible platform for VO2 deposition.
- Transferred graphene-supported VO2 films onto plastic substrates.
- Integrated flexible VO2 films into a mock-up house for testing.
Main Results:
- Achieved stoichiometric VO2 crystals with temperature-driven phase transitions on graphene.
- Demonstrated unprecedented mechanical flexibility in VO2 films.
- Showcased efficient in-house temperature reduction under infrared irradiation.
Conclusions:
- Graphene enables the fabrication of highly flexible VO2 thermochromic films.
- These films represent significant progress for energy-saving smart window applications.
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