Singlet-to-triplet (or vice versa) non-radiative transition mediated by spin-orbit coupling; heavy-atom effect enhances ISC; basis of room-temp phosphorescent emitters in OLEDs (Iridium complexes).
Singlet-to-triplet (or vice versa) non-radiative transition mediated by spin-orbit coupling; heavy-atom effect enhances ISC; basis of room-temp phosphorescent emitters in OLEDs (Iridium complexes).