| abstract |
The invention provides a spirofluorene xanthene compound and its application in a doping material for a light-emitting layer. The compound represented by the formula I provided by the present invention uses the groups represented by (I-1) to (I-6) as the basic core structure, and connects the spirofluorene xanthene or spirofluorene thiathene through N, and is used for The material properties are improved, so that the organic electroluminescent device prepared by using the compound of the present application, especially the blue light-emitting device, has higher luminous efficiency, lower driving voltage and longer lifetime. At the same time, part of the structure can be used for green light doped materials with excellent performance. |