Thermochromic low-emissivity film

摘要

Thermochromic low-emissivity films can comprise a vanadium dioxide thin film or a thin film of vanadium dioxide nanoparticles incorporated into a polymer matrix, and a layer comprising a transparent conductive oxide to modify solar heat gain, solar reflectivity and thermal resistance of windows. The thermochromic low-emissivity films transition from infrared (IR) reflective when warm, to IR transparent when cool. This dynamic reflectivity is passive by nature, and requires no electronics or power source to shift. In addition, this dynamic transition can occur at any design temperature, and when the nanoparticles are dispersed, they remain transparent in the visible spectrum during both phases.