| abstract |
Disclosed is a dibenzo heterocyclic compound, which has the structure as shown in formula (I). The dibenzo heterocyclic compound has a low LUMO energy level, can match well with an electron transport material, and is conducive to the injection and transport of electrons. The dibenzo heterocyclic compound has a good hole transport ability, and as a light-emitting layer material, same can balance the proportion of electrons to holes in a light-emitting layer to increase the probability of recombination, so as to improve the light emission efficiency of a device. By means of the spatial configuration of the dibenzo heterocyclic compound, the stacking of material molecules can be avoided so as to prevent intermolecular energy transfer leading to the production of high-energy excitons, thereby reducing the annihilation of excitons and suppressing efficiency roll-off. In addition, the dibenzo heterocyclic compound has a good thermal stability, and can achieve highly efficient and stable blue-light emission. Also disclosed is an organic electroluminescent device, at least one functional layer of which contains the above dibenzo heterocyclic compound, and by means of which a blue-light device having a high blue light emission efficiency and a low working voltage can be achieved. |