abstract |
A compound represented by formula (A-0) or (B-0) is useful as a material for organic EL devices which realizes an organic EL device exhibiting high emission efficiency even when driving at a low voltage and has a long lifetime: n nwherein R 1 to R 4 , n1, m2, k3, k4, L 0 to L 2 , Ar 1 , and Ar 2 are as defined in the description. |