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 language | English |
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Article number | 111163 |
Journal | Solar Energy Materials and Solar Cells |
Volume | 230 |
DOIs | |
State | Published - 15 Sep 2021 |
Bibliographical note
Publisher Copyright:© 2021 Elsevier B.V.
Keywords
- Smart window
- Solar modulation
- Surface plasmon resonance
- Thermal management
- Thermochromics
- VO
- Wettability