Scalable thermochromic smart windows with passive radiative cooling regulation

Radiative cooling materials spontaneously radiate long-wave infrared (LWIR) to the cold outer space, providing cooling power that is preferred in hot seasons. Radiative cooling has been widely explored for walls and roofs but rarely for windows, which are one of the least energy-efficient parts of buildings. We fabricated scalable smart windows using a solution process giving different emissivity (epsilon) at high (epsilon(LWIR-H) of 0.61) and low (epsilon(LWIR-L) of 0.21) temperatures to regulate radiative cooling automatically while maintaining luminous transparency and near-infrared (NIR) modulation. These passive and independent visible-NIR-LWIR regulated smart windows are capable of dynamic radiative cooling for self-adapting applications across different climate zones.

Automated summary

Researches have developed scalable smart windows that can automatically regulate radiative cooling capacity while maintaining transparency and modulating performance, suitable for self-adapting applications in different climate zones.