申请人:IDEMITSU KOSAN CO., LTD.
公开号:US20180123043A1
公开(公告)日:2018-05-03
An aromatic amine derivative represented by formula (1):
wherein R
1
, R
2
, R
3
, L, Ar
1
, Ar
2
, k, m, and n are the same as defined in the specification, is useful as a material for an organic EL device and realizes an organic EL device with a high efficiency and a long lifetime even when driving it at a low voltage.