| abstract |
The present invention provides a class of aromatic heterocyclic compounds, which can be used as electron transport materials. This type of compound has the parent structure of asymmetrically substituted dibenzoheterocycle, high bond energy between atoms, good thermal stability, and is conducive to solid-state stacking between molecules, and has strong electron transition ability, and is used as electron transport material. The use can effectively reduce the driving voltage of the organic electroluminescent device, improve its current efficiency and prolong its service life. The present invention also provides an organic electroluminescence device and a display device comprising the compound. |