Fig. 1: Schematic representation for the manipulation of an UV irradiation-responsive organic molecule-doped PVA system.
From: Ultraviolet irradiation-responsive dynamic ultralong organic phosphorescence in polymeric systems
a Schematic illustration the competitive decay channels of luminescent materials. b Proposed mechanism and c molecular structures for irradiation-responsive ultralong RTP systems. Singlet excitons (Sn) produce triplet excitons (Tn) through the ISC process, and suppressing nonradiative transitions of the molecules leads to efficient phosphorescence. The formation of a rigid surrounding matrix can stabilize the triplet excitons and generate radiation-dependent phosphorescence. Abs. absorbance, Fluo. fluorescence, Phos. phosphorescence, LPL long persistent luminescence, IC internal conversion, Non-rad. nonradiation.
