Afterglow materials, organic long persistent luminescence, organic phosphorescence, two-component design strategy, triplet excited states Keywords: afterglow materials; organic long persistent luminescence; organic phosphorescence; two-component design strategy; triplet excited states EN afterglow materials organic long persistent luminescence organic phosphorescence two-component design strategy triplet excited states 1 1 1 06/24/22 20220621 NES 220621 B Recent progress of high-performance afterglow materials b obtained by a two-component design strategy is reviewed. Due to the unique advantages of two-component design strategies, various derivative strategies such as the dopant-matrix design, donor-acceptor design, sensitization and energy transfer strategies can be applied to manipulate triplet excited states.