Ultralong Room‐Temperature Phosphorescent Coatings Enabled by Coronene Aggregates in Specialty Epoxy Resin: Wide‐Range Excitation From Violet to Green Light

of up to 90 s, far exceeding the 40 s record of Cor-doped thermoplastic polymers. Furthermore, leveraging phosphorescence resonance energy transfer enables a red afterglow of 60 s under white-light excitation. Owing to the high glass transition temperature of the SER matrix, the material retains afterglow emission even at 135°C. These combined characteristics significantly expand the application scope of RTP materials.