Three novel iridium (III) complexes containing double chiral atoms for organic light‐emitting diodes

Chiral iridium (III) complexes are very important for the preparation of circularly polarized organic diodes light-emitting (CP-OLEDs). Three novel complexes, Ir(dnfppy)2(Cl/pyrrole), Ir(dfppy)2(dpp), and Ir(tfmqz)2(sdpp), have been synthesized characterized, respectively. These emitted deep-blue, blue, red photoluminescence with high quantum yields (Ir(dnfppy)2(Cl/Pyrrole): λmax = 447 nm, F 62.4%; Ir(dfppy)2(dpp): 467 25%; Ir(tfmqz)2(sdpp): 609 73.7%). Compared HOMO energy levels Ir(dfppy)2(dpp) Ir(tfmqz)2(sdpp) were calculated to be −5.71/−5.73 eV, LUMO increased −2.75/−3.36 The circular dichroism spectra two pairs enantiomers or displayed symmetry opposite polarization between 300 600 nm. maximum external efficiency (EQEmax) OLEDs based on Ir(tfmpqz)2(sddp) was 13.8%, showing a relatively low roll-off EQE 10.7% at 5000 cd/m2.