Multifunctional aggregation-induced emission materials for nondoped OLEDs

Organic light-emitting diodes (OLEDs) have attracted considerable attention due to their potential applications in flat-panel displays and solid-state lighting. The active organic materials are very important for fabricating efficient OLEDs. However, many conventional luminescent materials often encounter severe emission quenching in the aggregated state. In addition, these luminescent materials generally can only function as light-emitting layers and require complicated OLED configurations, such as multilayer doped devices. These drawbacks undermine the electroluminescence efficiencies of OLEDs, and raise the manufacturing cost. Luminogens with aggregation-induced emission (AIE) characteristics can emit strongly in the aggregated state, which are ideal light-emitting materials for OLEDs without needing doping technique.