Blue AIEgens: approaches to control the intramolecular conjugation and the optimized performance of OLED devices

As one kind of important emitting material, efficient blue-emitting luminogens are badly needed for perfect commercialization of OLEDs. Limited by their intrinsic wide bandgap and their low efficiency in the solid state, excellent blue luminogens are still scarce. Excitingly, the characteristic of aggregation-induced emission might offer a new opportunity to develop good blue luminogens. This review summarizes the recent progress in the field of blue AIEgens, mainly focusing on design strategies for controlling the intramolecular conjugation effect and to realize blue emission, and also gives some outlooks on the further exploration of this field at the end of this paper.