“…Solid–liquid PCMs store thermal energy at almost constant temperatures while undergoing a reversible transition from an opaque crystalline material to a transparent liquid. Therefore, solid–liquid PCMs have the dual advantages of energy storage and dimming, making them one of the most promising candidate materials for energy-saving glass. , Polymers are usually used to encapsulate solid–liquid materials to prevent liquid leakage from the PCM. , Note that polymers must have compatibility and a well-matched refractive index with phase change materials. Otherwise, composite phase change materials no longer have a switchable optical transmittance.…”