| abstract |
Materials for organic electronic devices including organic photovoltaic devices. An oligomer or polymer comprising: n n n n n n n n n n wherein R 1 , R 2 , R 3 , and R 4 are independently hydrogen or solubilizing groups. Monomers and ink compositions can be also prepared. The materials can be used in an OPV active layer and show excellent absorption properties with bathochromic shift. |