Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 8, Issue 43, Pages 29742-29748Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.6b11202
Keywords
vanadium dioxide; ionic liquid-nickel-chlorine complexes; visible thermochromism; excellent performance; color change
Funding
- MOST [2014AA032802]
- Key Research Program of the Chinese Academy of Sciences [KFZD-SW-403]
- Science and Technology Commission of Shanghai Municipality (STCSM) [14DZ2261203]
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Vanadium dioxide (VO2), as a typical thermochromic material used in smart windows, is always limited by its weaker solar regulation efficiency (Delta T-sol) and lower luminous transmittance (T-lum). Except for common approaches such as doping, coating, and special structure, compositing is another effective method. The macroscopic thermochromic (from colorless to blue) ionic liquid nickel-chlorine (IL-Ni-Cl) complexes are selected in this paper to be combined with VO2 nanoparticles forming a composite film. This novel scheme demonstrates outstanding optical properties: Delta T-sol = 26.45% and T-lum,T-l = 66.44%, T-lum,T-l = 43.93%. Besides, the addition of the IL-Ni-Cl complexes endows the film with an obvious color change from light brown to dark green as temperature rises. This splendid visible thermochromic performance makes the composite film superior in function exhibiting and application of smart windows.
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