Binaphthol-based chiral host molecules for efficient solution-processed circularly polarized OLEDs.

Two kinds of chiral hosts, named (/)-BN-mCP and (/)-BN-2mCP, are prepared. Solution processable circularly polarized organic light-emitting diodes (CP-OLEDs) based on the chiral hosts and achiral emitter Ir(mypp) present the maximum external quantum efficiency (EQE) and dissymmetry factor values () of 12.7%/-1.7 × 10 and 17.1%/-1.3 × 10, respectively. Using ()-BN-2mCP as the chiral host and Ir(mypp) and Ir(piq)(acac) as the achiral emitters, the solution-processed OLED exhibits a broad emission spectrum with the EQE of 12.1% and of -1.1 × 10.