The invention relates to an
organic compound using diphenyleneimine as a core as well as a preparation method and application thereof. Through Pi conjugation effect in the compound provided by the invention, the compound has high hollow hole transmission capability; the initial
voltage of a device can be reduced through high hollow hole transmission speed; the efficiency of an
organic electroluminescence device can be improved. In addition, an unsymmetrical triarylated amine structure can reduce the
crystallinity of molecules; the plane performance of the molecules can be reduced; the movementof the molecules on the plane can be prevented, so that the
thermal stability of the molecules can be improved. Meanwhile, through a structure of the compound provided by the invention, the distribution of electrons and hollow holes in the luminous layer is more balanced; at the proper HOMO energy stage, the hollow hole injection and
transmission performance is improved; at the proper LUMO energystage, the
electron blocking effect is achieved, and the compounding efficiency of excitons in a luminous layer is improved; when the compound is used as a luminous function layer material of the
OLED luminous device, the diphenyleneimine is matched with the
branch chain in the scope of the invention, and the
exciton utilization rate and the
radiation efficiency can be effectively improved.