| abstract |
The invention provides a nitrogen-containing heterocyclic derivative and its preparation method and application, which belong to the technical field of organic electroluminescent materials. By optimizing the molecular structure design, the nitrogen-containing heterocyclic derivatives obtained in the present invention have better film-forming properties and thermal stability of the film, and can be used to prepare organic electroluminescent devices, especially as organic electroluminescent devices The hole-transporting material in it can effectively improve the luminous efficiency of OLED devices, which is better than the existing commonly used OLED devices. The invention also provides a preparation method of nitrogen-containing heterocyclic derivatives, the preparation method is simple and the raw materials are readily available. |