Efficient Bipolar AIE Emitter for High-Performance Nondoped OLED

Three luminogens were designed and synthesied by integrating TPE with hole-transporting carbazole (Cz) and/or electron-transporting 1,2-diphenyl-1H-benzimidazole (PBi), and the bare tetraphenylethene and another donor−acceptor (D−A) compound of aggregation-caused quenching (ACQ) were also prepared for comparasion. In nondoped OLEDs, the best one with both aggregation-induced emission (AIE) properties and donor−acceptor (D−A) structure showed the performents with Lmax, CEmax, PEmax, and EQEmax of 24308 cd m−2, and 15.10 cd A−1, 14.82 lm W−1, and 5.34%, respectively,which reached the theoretical limit of the fluorescent OLED.