• The film achieves high visible light transmittance (>70%) while blocking over 90% UV and 70% NIR radiation, balancing natural lighting and solar heat control.
• Incorporating hydrophobic silica enables high emissivity for radiative cooling, reducing indoor temperatures by up to 10 °C and yielding maximum additional cooling energy savings of 261 MJ m−2 per year.
• The superhydrophobic surface provides excellent self-cleaning properties and durability, making it suitable for long-term outdoor applications.
• Building energy simulations indicate annual energy savings between 14.1% and 31.9%, demonstrating significant potential for reducing building energy consumption.