Boron-nitrogen compound and organic electroluminescent device comprising same

Abstract

The present disclosure relates to the technical field of organic photoelectric material preparation and particularly to a boron-nitrogen compound and an organic electroluminescent device comprising same. The boron-nitrogen compound of the present disclosure has a good ability to accept electrons and holes. By introducing groups with large steric hindrance such as azafluorene/benzofluorene/azabenzofluorene/silafluorene/germafluorene, the interactions between luminescent molecules can be effectively inhibited. Structures such as the large conjugated spiro-ring structural unit and the sp2 aza-aromatic rings in the compound can improve the energy transmission performance between the host and the guest or the sensitizer. Specifically, after the boron-nitrogen compound of the present disclosure is used as a functional layer, particularly as the emissive layer, in a manufactured organic electroluminescent device, there is an improvement in current efficiency, a reduction in turn-on voltage, and a relatively big improvement in the lifespan of the device.

Dependencies are inferred from the claim text.