Superhydrophobic Solar‐to‐Thermal Materials toward Cutting‐Edge Applications

Abstract Solar‐to‐thermal conversion is a direct and effective way to absorb sunlight for heat via the rational design and control of photothermal materials. However, when exposed to water‐existed conditions, the conventional solar‐to‐thermal performance may experience severe degradation owing to the high specific heat capacity of water. To tackle with the challenge, the water‐repellent function is introduced to construct superhydrophobic solar‐to‐thermal materials (SSTMs) for achieving stable heating, and even, for creating new application possibilities under water droplets, sweat, seawater, and ice environments. An in‐depth review of cutting‐edge research of SSTMs is given, focusing on synergetic functions, typical construction methods, and cutting‐edge potentials based on water medium. Moreover, the current challenges and future prospects based on SSTMs are also carefully discussed.