The present invention relates to organic solar cell comprising at least one photoactive region comprising an organic donor material in contact with an organic acceptor material and forming a donor-acceptor heterojunction, wherein the photoactive region comprises at least one compound of the formulae Ia and/or Ib where M, (R
a
)
m
and (R
b
)
n
as described in the claims and description. Furthermore, the present invention relates to compounds of formulae Ia and Ib, wherein M, (R
a
)
m
and n are as described in the claims and description and R
b
is fluorine and to a process for preparing them.
本发明涉及一种有机太阳能电池,包括至少一个光活性区域,该区域包括与有机受体材料接触的有机给体材料,并形成给体-受体异质结,其中光活性区域包括至少一种式Ia和/或Ib的化合物,其中M、(Ra)mand (Rb)nas在权利要求和说明书中描述。此外,本发明还涉及式Ia和Ib的化合物,其中M、(Ra)mand n如权利要求和说明书中所述,Rb是
氟,并提供一种制备它们的方法。