Photopolymerization initiators absorb light energy and convert it into chemical energy, initiating polymerization reactions. These initiators are key components in polymerization reagents that enable rapid and controllable synthesis of polymers under mild conditions. Photopolymerization initiators have applications in the production of coatings, inks, adhesives, and 3D printing materials, where they have high reaction rates, good curing depths, and low energy consumption.