4, 4 '-substituted spiral dithioxanthene hole transport material and preparation method and application thereof

The invention discloses a 4, 4 '-substituted spiral dithioxanthene hole transport material as well as a preparation method and application of the 4, 4'-substituted spiral dithioxanthene hole transport material. According to the 4, 4 '-substituted spiral dithioxanthene hole transport material disclosed by the invention, rigid aromatic substituent groups are introduced to 4 and 4' positions of spiral dithioxanthene, so that molecules have a larger conjugated structure, the energy level of the material is effectively reduced, a band gap is widened, and the material has high carrier mobility and hole transport capacity; the compound can be well matched with the structure of an organic light-emitting device. The preparation method disclosed by the invention can be used for preparing the 4, 4 '-substituted spiral dithioxanthene hole transport material on a large scale. The 4, 4 '-substituted spiral dithioxanthene hole transport material can be applied to the organic electroluminescent device, the luminous efficienc