1. Instituto de Telecomunica??es, Instituto Superior Técnico, Lisbon, Portugal;2. Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Lisbon, Portugal;3. Instituto de Telecomunica??es and Department of Bioengineering, Instituto Superior Técnico, Universidade de Lisboa, Lisbon, Portugal;4. Chemical Engineering and Biotechnology Research Center, Instituto Superior de Engenharia de Lisboa, Lisbon, Portugal
Abstract:
Electron‐acceptor units, combined with bithiophene substituted with flexible chains end‐functionalized with cross‐linkable moieties, provide soluble donor‐acceptor‐donor (DAD) π‐conjugated oligomer‐type molecules with cross‐linking ability and broad absorption in the visible spectrum. A study on the cross‐linking conditions of the new oligomers to yield insoluble polymer networks is presented, including conditions for obtaining polymer films over poly(3,4‐ethylenedioxythiophene):polystyrene sulfonate‐covered substrates. The combination of the DAD molecular design and cross‐linking functionality opens prospects for applications in solution‐processed small‐molecule solar cells with morphologically‐stable organic layers.
