Dual‐Mode Integrated Janus Films with Highly Efficient NaH2PO2‐Enhanced Infrared Radiative Cooling and Solar Heating for Year‐Round Thermal Management

The currently available materials cannot meet the requirements of human thermal comfort against the hot and cold seasonal temperature fluctuations. In this study, a dual-mode Janus film with a bonded interface to gain dual-mode functions of both highly efficient radiative cooling and solar heating for year-round thermal management is designed and prepared. The cooling side is achieved by embedding NaH