| abstract |
The present invention relates to a novel aromatic amine derivative for organic electroluminescent devices, and more particularly, to a novel aromatic amine derivative suitable for use as a hole injecting material or a hole transporting material of an organic electroluminescent device. The aromatic amine derivative for an organic electroluminescence device according to the present invention is characterized by being represented by the following formula (A). (A) In the above formula (A), the substituents Ar 1 , Ar 2 , Ar 3 , Ar 4 R 1 , R 2 , R 3 and R 4 each represent a substituent selected from the group consisting of methyl, ethyl, stilbene, diphenyl, fluorene, diphenylpentene, Indole, and carbazole. |