申请人:Gao Weiying
公开号:US20100187981A1
公开(公告)日:2010-07-29
There is provided an electroactive composition. The composition has (a) a host material having Formula I
and (b) an electroactive dopant capable of electroluminescence having an emission maximum between 500 and 700 nm. In Formula I:
R
1
to R
8
are the same or different and can be H, alkyl, or alkoxy, or adjacent R groups may be joined together to form a 5- or 6-membered aliphatic ring, with the proviso that at least one of R
1
to R
8
is not H,
Ar
1
to Ar
4
are the same or different and are aryl groups,
A is the same or different at each occurrence and can be a single bond or a phenylene group, and
a and b are the same or different and are an integer of 0-2.