| abstract |
The invention discloses a thioxanthene type organic electroluminescent material. The above organic electroluminescent material takes thioxanthene as the parent nucleus, and its structural formula is: In the thioxanthene type organic electroluminescent material provided by the present invention, the thioxanthene is used as the parent nucleus to connect the aromatic heterocyclic group, which destroys the symmetry of the molecule, thereby destroys the crystallinity of the molecule, avoids intermolecular aggregation, and has the advantages of Good film-forming properties, and most of the molecules are rigid groups, thus improving the thermal stability of the material; at the same time, the thioxanthene-based organic electroluminescent material provided by the present invention has a D-A structure, and the distribution of electrons and holes is more balanced , and has suitable HOMO and LUMO energy levels, which can effectively improve the high exciton utilization rate and high fluorescence radiation efficiency, reduce the efficiency roll-off at high current density, reduce the device voltage, and improve the efficiency roll-off problem of the device at high current density . |