| abstract |
The invention discloses an organic electroluminescence device and a preparation method of the material thereof. The structure of this material is shown in formula I. The molecule of the material of formula I has a special spiro ring structure, which can effectively block intramolecular conjugation and increase its energy level width. At the same time, the spiro ring structure has high molecular rigidity, high glass transition temperature, high thermal Stability, the organic electroluminescence device using the material of the novel structure of the present invention as the hole layer has higher element efficiency than the organic electroluminescence device using the hole layer material of the prior art. |