Anisotropic localized surface plasmon resonance of vanadium dioxide rods in flexible thermochromic film towards multifunctionality

Qiyang Xu, Yujie Ke*, Chengchen Feng, Cong Chen, Zuohao Wen, Haoran Wang, Miaoyang Sun, Xinghai Liu*, Hai Liu, Shlomo Magdassi, Houbin Li, Chi Huang, Yi Long*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

18 Scopus citations

Abstract

Plasmonic thermochromic films are promising for smart window applications. Hereby, we develop a flexible plasmonic thermochromic film towards multifunctionality. The double-layer film consists of a bottom layer of W/Mg co-doped vanadium dioxide (VO2) rods in a polyurethane acrylate matrix and a top layer of hollow silica spheres (HSSs). Based on the finite-difference time-domain (FDTD) method, we demonstrate for the first time, a transverse and a longitudinal mode of VO2 localized surface plasmonic resonance (LSPR) in near- and mid-infrared bands, respectively, and only the transverse mode contributes to the solar energy modulation performance. The film shows a luminous transmittance of 46.2%, a solar energy modulation of 10.8%, and a critical transition temperature of 36.9 °C. The HSSs overcoating enhances the surface hydrophilicity and thermal insulation, which give rise to more favored functionalities for windows.

Original languageAmerican English
Article number111163
JournalSolar Energy Materials and Solar Cells
Volume230
DOIs
StatePublished - 15 Sep 2021

Bibliographical note

Publisher Copyright:
© 2021 Elsevier B.V.

Keywords

  • Smart window
  • Solar modulation
  • Surface plasmon resonance
  • Thermal management
  • Thermochromics
  • VO
  • Wettability

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