| abstract |
The present invention relates to the technical field of materials for organic electroluminescence elements, in particular to a carbazole derivative and its application; the structure of the carbazole derivative is shown in formula (I); the carbazole derivative of the present invention It has high triplet energy level and high glass transition temperature, and is suitable for use as a material for organic electroluminescence elements. The material for organic electroluminescence elements containing the carbazole derivative has low startup voltage and luminous efficiency. and high brightness. In addition, the carbazole derivatives of the present invention have good thermal stability and film-forming properties, can be used in materials for organic electroluminescence elements, organic electroluminescence elements, display devices, and lighting devices, and can prolong the service life, thereby enabling Reduce the manufacturing cost of materials for organic electroluminescence elements, organic electroluminescence elements, display devices, and lighting devices. |