| abstract |
The present invention relates to an organic electroluminescent material and a preparation method and application thereof, wherein the organic electroluminescent material is shown in the following formula I: Wherein, the R 1 and R 2 are the same or different, the R 1 and R 2 exist simultaneously or partially, and the R 1 and R 2 are selected from hydrogen, substituted or unsubstituted, and contain 4-36 carbon atoms and One of aromatic heterocyclic groups containing at least one of N, S, and O. The organic optoelectronic material has the characteristics of not easy to crystallize between molecules, not easy to aggregate, and good film-forming properties, and the 3D rigid structure in the molecule can improve the thermal stability of the light-emitting material, and is used as a light-emitting material in organic electroluminescent devices. The maximum current efficiency of the organic electroluminescence device is improved, the turn-on voltage of the organic electroluminescence device is reduced, and the lifespan of the organic electroluminescence device is greatly improved. |