Construction of colorful super-omniphobic emitters for high-efficiency passive radiative cooling

A series of colorful super-omniphobic radiative cooling emitters with layered structures has been constructed by two-step process. The colors of the emitters contained three primary colors (red, green, and blue) to obtain desired aesthetics, and the pigments used were selected by theoretical analysis. The emitters could reflect above 90% of the near infrared light and display infrared emission above 85% within atmospheric window. The asprepared super-omniphobic colorful radiative cooling emitters all obtained wettability of water contact angles above 160 degrees and oil contact angles above 150 degrees. Besides, super-omniphobicity endowed the emitters with selfcleaning properties. Moreover, the emitters could remain the optical performance and super-omniphobicity after abrasion and UV irradiation. For the outdoor cooling measurement within 2 days, the emitters could drop the temperature down to 5-10 degrees C below those of the reference samples during daytime and 3-5 degrees C during the nighttime. This research paves a new way to synchronously achieve efficient durable radiative cooling and aesthetic performance.

Automated summary

A series of colorful super-omniphobic radiative cooling emitters with layered structures were constructed using a two-step process. These emitters can reflect over 90% of near infrared light, display over 85% infrared emission within atmospheric window, and have self-cleaning properties. Additionally, they maintained optical performance and super-omniphobicity even after abrasion and UV irradiation, providing efficient durable radiative cooling and aesthetic performance.