| abstract |
The present invention discloses a novel organic compound is represented by the following formula(I), the organic EL device employing the organic compound as host material or dopant material of emitting layer and/or as electron transporting material can lower driving voltage, prolong half-lifetime and increase the efficiency. n n n n n n n n n n wherein m represent an integer of 0 to 10, n represent an integer of 0 to 2. X is a divalent bridge selected from the atom or group consisting from O, S, C(R 5 ) 2 , N(R 5 ), Si(R 5 ) 2 . Ar, R 1 to R 4 are substituents and the same definition as described in the present invention. |