申请人:TAKEDA Akira
公开号:US20080286605A1
公开(公告)日:2008-11-20
An organic electroluminescent device includes a pair of electrodes; and an organic layer between the pair of electrodes, which includes a light-emitting layers wherein the organic layer contains a compound represented by the following formula (I); and the light-emitting layer contains a iridium complex phosphorescent material:
wherein R
1
, R
2
, R
3
, R
4
, R
5
, R
6
, R
7
and R
8
each represents a hydrogen atom or a substituent, and contiguous substituents of R
1
to R
8
may be bonded to each other to form a condensed ring; R
9
represents an alkyl group, an alkenyl group, an aryl group, a hetero-aryl group, or a silyl group, and each of which group may be substituted with a substituent; and at least one of R
1
to R
9
represents a deuterium atom or a substituent containing a deuterium atom.