Low Band Gap Polymers for Roll-to-Roll Coated Organic Photovoltaics – Design, Synthesis and Characterization

Eva Bundgaard, Ole Hagemann, Mikkel Jørgensen, Frederik C Krebs

    Research output: Contribution to journalJournal articleResearchpeer-review

    Abstract

    In this paper we present the design and synthesis of 25 new low band gap polymers. The polymers were characterized by UV-vis spectroscopy which showed optical band gaps of 2.0–0.9 eV. The polymers which were soluble enough were applied in organic photovoltaics, both small area devices with a spin coated active layer and in large area modules where all layers including the active layer were either roll-to-roll coated or printed. These experiments showed that the design of polymers compatible with roll-toroll coating is not straightforward and that there are various issues such as donor/acceptor fitting within the polymer, side chains to ensure solubility and HOMO/LUMO level alignment with the acceptor (e.g. [60]PCBM) to take into consideration.
    Original languageEnglish
    JournalGreen
    Volume1
    Issue number1
    Pages (from-to)55-64
    ISSN1869-876X
    DOIs
    Publication statusPublished - 2011

    Keywords

    • organic photovoltaics.
    • Low band gap polymer
    • synthesis
    • design

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