申请人:BASF SE
公开号:US20170018717A1
公开(公告)日:2017-01-19
The present invention relates to compounds of the formula I
wherein X
1
, X
2
are O or C(CN)
2
; A is selected from
wherein, if present, X
3
, X
4
are O or C(CN)
2
and m, R
4a
, R
4b
, R
5a
, R
5b
, R
6a
, R
6b
, R
6c
, R
6d
, R
7a
, R
7a
, R
8a
, R
8b
, R
9
, R
10a
, R
10b
, R
m1
, R
m2
, R
m3
and R
m4
are as defined in the claims and description. The present invention also relates to a method for their preparation and their use as semiconductors, in particular as semiconductors in organic electronics and organic photovoltaics.