| abstract |
The present invention provides an organic compound and its preparation method and application. The organic compound has the structure shown in the following formula I or formula II. In the present invention, by connecting side chains with specific structures at specific positions of dibenzofuran or dibenzothiophene and prolonging molecular conjugation, the hole mobility of the compound can be improved and the spatial structure can be changed, thereby making it more suitable for use in devices. When the compound provided by the invention is used as a luminescence auxiliary material in an organic electroluminescent device, the lifespan and luminous efficiency of the organic electroluminescent device can be effectively improved, and the driving voltage of the device can be reduced at the same time. |