Flexible thermochromic window based on hybridized VO2/graphene

Hyeongkeun Kim, Yena Kim, Keun Soo Kim, Hu Young Jeong, A. Rang Jang, Seung Ho Han, Dae Ho Yoon, Kwang Suck Suh, Hyeon Suk Shin, Taeyoung Kim, Woo Seok Yang

Research output: Contribution to journalArticle

79 Citations (Scopus)

Abstract

Large-scale integration of vanadium dioxide (VO2) on mechanically flexible substrates is critical to the realization of flexible smart window films that can respond to environmental temperatures to modulate light transmittance. Until now, the formation of highly crystalline and stoichiometric VO2 on flexible substrate has not been demonstrated due to the high-temperature condition for VO2 growth. Here, we demonstrate a VO2-based thermochromic film with unprecedented mechanical flexibility by employing graphene as a versatile platform for VO 2. The graphene effectively functions as an atomically thin, flexible, yet robust support which enables the formation of stoichiometric VO2 crystals with temperature-driven phase transition characteristics. The graphene-supported VO2 was capable of being transferred to a plastic substrate, forming a new type of flexible thermochromic film. The flexible VO2 films were then integrated into the mock-up house, exhibiting its efficient operation to reduce the in-house temperature under infrared irradiation. These results provide important progress for the fabrication of flexible thermochromic films for energy-saving windows.

Original languageEnglish
Pages (from-to)5769-5776
Number of pages8
JournalACS Nano
Volume7
Issue number7
DOIs
Publication statusPublished - 2013 Jul 23

Fingerprint

thermochromic coatings
Graphite
Graphene
graphene
large scale integration
dioxides
Substrates
vanadium
ambient temperature
transmittance
flexibility
plastics
platforms
LSI circuits
Temperature
fabrication
irradiation
temperature
Vanadium
Energy conservation

Keywords

  • flexible thermochromic window
  • graphene
  • roll transfer
  • smart windows
  • vanadium dioxide

ASJC Scopus subject areas

  • Engineering(all)
  • Materials Science(all)
  • Physics and Astronomy(all)

Cite this

Kim, H., Kim, Y., Kim, K. S., Jeong, H. Y., Jang, A. R., Han, S. H., ... Yang, W. S. (2013). Flexible thermochromic window based on hybridized VO2/graphene. ACS Nano, 7(7), 5769-5776. https://doi.org/10.1021/nn400358x

Flexible thermochromic window based on hybridized VO2/graphene. / Kim, Hyeongkeun; Kim, Yena; Kim, Keun Soo; Jeong, Hu Young; Jang, A. Rang; Han, Seung Ho; Yoon, Dae Ho; Suh, Kwang Suck; Shin, Hyeon Suk; Kim, Taeyoung; Yang, Woo Seok.

In: ACS Nano, Vol. 7, No. 7, 23.07.2013, p. 5769-5776.

Research output: Contribution to journalArticle

Kim, H, Kim, Y, Kim, KS, Jeong, HY, Jang, AR, Han, SH, Yoon, DH, Suh, KS, Shin, HS, Kim, T & Yang, WS 2013, 'Flexible thermochromic window based on hybridized VO2/graphene', ACS Nano, vol. 7, no. 7, pp. 5769-5776. https://doi.org/10.1021/nn400358x
Kim H, Kim Y, Kim KS, Jeong HY, Jang AR, Han SH et al. Flexible thermochromic window based on hybridized VO2/graphene. ACS Nano. 2013 Jul 23;7(7):5769-5776. https://doi.org/10.1021/nn400358x
Kim, Hyeongkeun ; Kim, Yena ; Kim, Keun Soo ; Jeong, Hu Young ; Jang, A. Rang ; Han, Seung Ho ; Yoon, Dae Ho ; Suh, Kwang Suck ; Shin, Hyeon Suk ; Kim, Taeyoung ; Yang, Woo Seok. / Flexible thermochromic window based on hybridized VO2/graphene. In: ACS Nano. 2013 ; Vol. 7, No. 7. pp. 5769-5776.
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