| abstract |
The invention discloses a spirofluorene xanthene derivative and its application in OLED devices. This type of compound incorporates a six-membered heterocyclic structure containing nitrogen atoms on the core skeleton of spirofluorene xanthene. The spirofluorene xanthene derivatives have high carrier mobility and high glass transition temperature, and are not easy to crystallize, so they have good thermal stability and film-forming properties, and are suitable for use in organic electroluminescent devices. Functional materials, especially used as hole transport layer materials, hole injection layer materials and light-emitting host materials, can effectively improve the luminous efficiency and service life of devices. |