Chemical reactivity of aromatic hydrocarbons and operational degradation of organic light-emitting diodes

摘要: We report the study of chemical reactivity representative hydrocarbon organic light-emitting diode (OLED) materials—fully aromatic derivatives anthracene and tetracene in OLED environment. In addition to participation free-radical chemistry initiated by homolytic bond dissociation reactions arylamines, hydrocarbons appear initiate undergo dehydrogenation following electronic excitation caused recombination charge carriers or absorption a photon. A product intramolecular reaction, cyclization, was identified photoexcited films derivative detected electrically degraded OLEDs utilizing this material emissive layer. Other analogous intra- intermolecular excited states are also expected occur operating OLEDs. The stepwise transfers hydrogen atoms ions neighboring molecules likely yi...