VO2/TiN Plasmonic Thermochromic Smart Coatings for Room-Temperature Applications

Abstract

Vanadium dioxide/titanium nitride (VO₂/TiN) smart coatings are prepared by hybridizing thermochromic VO₂ with plasmonic TiN nanoparticles. The VO₂/TiN coatings can control infrared (IR) radiation dynamically in accordance with the ambient temperature and illumination intensity. It blocks IR light under strong illumination at 28 °C but is IR transparent under weak irradiation conditions or at a low temperature of 20 °C. The VO₂/TiN coatings exhibit a good integral visible transmittance of up to 51% and excellent IR switching efficiency of 48% at 2000 nm. These unique advantages make VO₂/TiN promising as smart energy-saving windows.

Thermochromic vanadium oxide (VO₂) film is coated on titanium nitrate (TiN) plasmonic nanoparticles to fabricate a hybrid VO₂/TiN smart coating. This novel coating can intelligently control the infrared (IR) radiation under room-temperature conditions by reflecting the IR radiation at a high temperature while allowing most of the radiation to go through at a low temperature.

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