Radiative cooling is a sustainable thermal management strategy, and nanophotonic structures that enable broadband reflection have extended its application from nighttime to daytime by minimizing sunlight absorption. However, this approach typically results in white or neutral color radiative coolers, limiting their practical use for aesthetic purposes. Traditionally, selective absorption at specific visible wavelengths has been used for colorization, but this can reduce cooling efficiency due to increased heating. In a new study, the use of opals has been explored to create color-preserved daytime radiative coolers. Opals, primarily known as Bragg reflective color pigments, can act as effective homogeneous media in the mid-infrared region, making them suitable for radiative cooling even under direct sunlight. Their fluidity in colloidal suspensions allows for easy crafting of large-scale, colorful radiative coolers with minimal solar absorption.-Science journal cover design by scapiens
[Scientific Journal cover design] Low-Thermal-Budget Fluorite-Structure Ferroelectrics for Future Electronic Device Applications
In article number 2100028, Jiyoung Kim, Si Joon Kim, and their team review key factors involved in developing fluorite-structure ferroelectrics
