| abstract |
The invention discloses a spiroxanthene fluorene-containing compound and its application in organic electroluminescence devices. The compound has strong rigidity because of the spiroxanthene fluorene structure, and can be used in connection with carbazole derivatives. After the long branched chain structure, the compound has the characteristics of intermolecular crystallization, aggregation, good film-forming properties, etc.; the compound of the present invention has bipolarity of the parent nucleus, the branched chain is an electron donating group, and the branched chain group donates electrons The strength of the ability is different, so the HOMO energy level of the material is different, and it can be used as a material for different functional layers; in addition, the compound of the present invention has a higher triplet energy level, which can effectively block energy loss and facilitate energy transfer. Therefore, after the compound of the present invention is applied to an OLED device as an organic electroluminescence functional layer material, the current efficiency, power efficiency and external quantum efficiency of the device are greatly improved; at the same time, the life of the device is significantly improved. |