Fig. 5: Theoretical calculation of luminescent polymer structural units and white light-emission mechanism.
From: Long lifetimes white afterglow in slightly crosslinked polymer systems

a Electrostatic potential (ESP) of afterglow-tunable TPAP determined by simulation. b Energy levels and spin-orbit coupling constants of TPAP. c Natural transition orbitals of singlet and triplet excited states of TPAP. d White light-emission mechanism of different excited states. “Phos.” stands for phosphorescence. “IC” represents the internal conversion based on Kasha rule.