In this study, we proposed two carbazole-benzonitrile-based bipolar hosts, namely 2,6-bis(3-(9H-carbazol-9-yl)phenoxy)benzonitrile and 2,6-bis(4-(9H-carbazol-9-yl)phenoxy)benzonitrile, for improving the efficiency of blue phosphorescent organic light-emitting diodes.
Strategic selection of cyanosubstitution positions and quantities has become a critical approach for advancing host material design in blue PhOLEDs.
Oxygen-bridged boron derivatives 3,11-di(9H-carbazol-9-yl)-5,9-dioxa-13b-boranaphtho[3,2,1-de]anthracene and 2,12-di(9H-carbazol-9-yl)-5,9-dioxa-13b-boranaphtho[3,2,1-de]anthracene were successfully developed as n-type (electron transport type) hosts with TADF characteristics.
In this study, we developed a molecular design strategy for tetradentate Pt(II) complexes to improve the efficiency and color purity of blue phosphorescent organic light-emitting diodes (PhOLEDs).
Using QC/MD simulation, a stable blue host with a high T1 level was developed. These hosts enhance the efficiency and stability of phosphorescent organic light-emitting diodes (PhOLEDs) due to improved triplet energy and charge balance.