Diphenyliodonium hexafluorophosphate is a common cationic photoinitiator. Photoinitiators are important components of environmentally friendly UV curable materials. It has attracted widespread attention in recent years and is becoming a research hotspot in Chemicalbook. Diaryliodonium salts are currently the most widely used cationic photoinitiators. Such initiators have good photosensitivity, stability, photoinitiating activity and compatibility with prepolymers.