| abstract |
The invention discloses a compound containing azaspirofluorene and a nitrogen-containing six-membered heterocycle and its application in OLED. The compound contains azaspirofluorene and aza six-membered ring structures, and the spirofluorene structure has at least a One N; both groups are strong electron groups, have deep HOMO energy level and high electron mobility, and are suitable for application as hole blocking materials or electron transport materials; the structure of the present invention containing hole groups can balance The electrons and holes of the material enable the material to be used as the host material of the electron-biased light-emitting layer; in addition, the compound of the present invention has strong group rigidity, is not easy to crystallize between molecules, not easy to aggregate, and has the characteristics of good film-forming properties. After being used as an organic electroluminescence functional layer material in an OLED device, the current efficiency, power efficiency and external quantum efficiency of the device are greatly improved; at the same time, the lifespan of the device is significantly improved. |