Thiaxanthene dioxide organic electroluminescence material as well as preparation method and application thereof

The invention discloses a thiaxanthene dioxide organic electroluminescence material as well as a preparation method and application thereof. The structural formula of the thiaxanthene dioxide organic electroluminescence material is shown in the specification. In the thiaxanthene dioxide organic electroluminescence material disclosed by the invention, thiaxanthene dioxide serves as parent nucleus and is connected with an aromatic heterocyclic group, and the molecular symmetry is damaged, thus the molecular crystallinity is destroyed, the intermolecular aggregation is avoided, and good film forming property is realized; since rigid groups are prevalent in molecules, thermal stability of the material is improved; meanwhile, the thiaxanthene dioxide organic electroluminescence material disclosed by the invention is of a D-A structure, thus the distribution of electrons and holes is more balanced; and due to the appropriate energy levels of HOMO and LUMO, the exciton utilization rate and fluorescent radiation effi