Thiaxanthene organic electroluminescent material and preparation method and application thereof

The invention discloses a thiaxanthene organic electroluminescent material. According to the organic electroluminescent material, thiaxanthene is taken as a mother nucleus, and the structural formula of the organic electroluminescent material is as shown in the specification. According to the thiaxanthene organic electroluminescent material, the thiaxanthene is taken as the mother nucleus and connected with an aromatic heterocyclic group, and the molecular symmetry is destroyed to destroy the crystallinity of the molecules, the aggregation action among the molecules is avoided, the thiaxanthene organic electroluminescent material has good film-forming property, and the molecules mainly contain rigid groups, so that the heat stability of the material is improved. Meanwhile, the thiaxanthene organic electroluminescent material has a D-A structure, electron and hole distribution is more balanced, the thiaxanthene organic electroluminescent material contains proper HOMO and LUMO energy levels, the high exciton ut