| abstract |
The benzo[a]carbazole compound represented by the formula (1) of the present invention is an electron transport material that contributes to high luminous efficiency, long life, and the like of an organic electroluminescent device. By using this compound to manufacture an organic electroluminescent device, high luminous efficiency and long-term stable driving can be realized. In formula (1), a, b, c, and d are 1 or 0, but a and b are not 0 at the same time; Py 1 and Py 2 are pyridyl or bipyridyl; when a is 0, Ar 1 is Hydrogen or aryl, when a is 1, Ar 1 is arylene, when b is 0, Ar 2 is hydrogen or aryl, when b is 1, Ar 2 is arylene; A is aryl; R 1 to R 8 are hydrogen, alkyl, cycloalkyl, aryl, or heteroaryl. |