"Hairy" Poly(3-hexylthiophene) Particles Prepared via Surface-Initiated Kumada Catalyst-Transfer Polycondensation

Volodymyr Senkovskyy, Roman Tkachov, Tetyana Beryozkina, Hartmut Komber, Ulrich Oertel, Marta Horecha, Vera Bocharova, Manfred Stamm, Suren Gevorgyan, Frederik C Krebs, Anton Kiriy

    Research output: Contribution to journalJournal articleResearchpeer-review


    Herein, we present a new paradigm in the engineering of nanostructured hybrids between conjugated polymer and inorganic materials via a chain-growth surface-initiated Kumada catalyst-transfer polycondensation (SI-KCTP) from particles. Poly(3-hexylthiophene), P3HT, a benchmark material for organic electronics, was selectively grown by SI-KCTP from (nano)particles bearing surface-immobilized Ni catalysts supported by bidentate phosphorus ligands, that resulted in hairy (nano)particles with end-tethered P3HT chains. Densely grafted P3HT chains exhibit strongly altered optical properties compared to the untethered counterparts (red shift and vibronic fine structure in absorption and fluorescence spectra), as a result of efficient planarization and chain-aggregation. These effects are observed in solvents that are normally recognized as good solvents for P3HT (e.g., tetrahydrofurane). We attribute this to strong interchain interactions within densely grafted P3HT chains, which can be tuned by changing the surface curvature (or size) of the supporting particle. The hairy P3HT nanoparticles were successfully applied in bulk heterojunction solar cells.
    Original languageEnglish
    JournalJournal of the American Chemical Society
    Issue number45
    Pages (from-to)16445-16453
    Publication statusPublished - 2009

    Bibliographical note

    This work
    was further supported by the Danish Strategic Research Council
    (DSF 2104-05-0052 and 2104-07-0022) and by EUDP (j. nr. 64009-


    • Polymer solar cells
    • Solar energy


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