abstract |
The present invention relates to a first electron donor moiety which is an indolo- [3,2,1-j, k] carbazole (Indolo- [3,2,1- A second electron donor moiety selected from indol- [3,2,1-j, k] carbazole, carbazole or triphenylamine, Wherein the electron acceptor moiety is bonded to an electron acceptor moiety selected from dibenzothiophene sulfone or diphenyl sulfone and the electron acceptor moiety is selected from the group consisting of indolo- [3,2,1-j, k] carbazole (Indolo- [3,2,1-j, k] carbazole) at the para position. |