Daylong Sub‐Ambient Radiative Cooling with Full‐Color Exterior Based on Thermal Radiation and Solar Decoupling

Abstract Terrestrial radiative cooling is an intriguing way to mitigate the accelerating demands in residential and commercial sectors by offering zero‐energy cooling. However, ultra‐white or mirror‐like appearance of coolers can be visually sterile raise safety issues when applied building facades vehicles en masse. To overcome fundamental trade‐off between color diversity performance, a radiatively integrated, conductively insulated material system proposed that exploits thermal non‐equilibrium colorants emitters. This allows such cooled below ambient temperature at all times day while exhibiting any desired exterior including black without using vacuum insulation. work experimentally demonstrates even coolers, absorbing 646 W m −2 solar power under AM1.5 conditions, cool down maximum 6.9 K (average 3.5 K) during daytime. These systems potentially used outdoor applications, especially buildings houses, where carbon‐free management high demand but colors also important for visual appeal comfort.