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- Solution-Processable Donor-Acceptor-Donor Oligomers with Cross-Linkable FunctionalityPublication . Brotas, Graça; Costa, Cristiana; Dias, Sandra I. G.; Costa, Pedro M. M.; Paolo, Roberto E. Di; Martins, João; Farinhas, Joana; Alcácer, Luís; Jorge Morgado; Matos, Manuel; Charas, AnaElectron-acceptor units, combined with bithiophene substituted with flexible chains end-functionalized with cross-linkable moieties, provide soluble donor-acceptor-donor (DAD) it-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.