| abstract |
The invention discloses a hole transport material and an organic electroluminescence device using the material. The hole transport material has a structural formula as shown in formula I: The hole transport material of the present invention contains an aromatic amine structure, the gain and loss of electrons mainly occur on the nitrogen atom, and the connection with the main nucleus will increase the electron conjugation system around the nitrogen atom, the conjugation effect is enhanced, and the photoluminescence quantum The efficiency is greatly improved, which is also conducive to the transport of carriers, and the increase of the conjugated system increases the delocalization of electrons, so that the traps can be reduced in the transport of carriers, and the transport of carriers in it can be reduced. It is easier, and has good chemical stability, thermal stability and morphological stability, which can effectively improve the aging resistance of the device, improve the service life and luminous efficiency. |