Low Band Gap Polymers for Roll-to-Roll Coated Polymer Solar Cells

Eva Bundgaard, Ole Hagemann, Matthieu Manceau, Mikkel Jørgensen, Frederik C Krebs, Eva Bundgaard, Ole Hagemann, Matthieu Manceau, Mikkel Jørgensen, Frederik C. Krebs

    Research output: Contribution to journalJournal articleResearchpeer-review

    Abstract

    We present the synthesis of a low band gap copolymer based on dithienothiophene and dialkoxybenzothiadiazole (poly(dithienothiophene-co-dialkoxybenzothiadiazole), PDTTDABT). The optical properties of the polymer showed a band gap of 1.6 eV and a sky-blue color in solid films. The polymer was explored in roll-to-roll coating experiments and was optimized with respect to the manufacturing process and mixing ratio with [60]PCBM through a series of experiments with variation of the composition in steps of 1% w/w of respectively PDTTDABT and [60]PCBM and a relatively broad optimimum was found around a 1:2 mixing ratio. Roll-to-roll coated polymer solar cell devices were prepared under ambient conditions employing solution processing in all steps including the metallic back electrode that was printed as a grid giving semitransparent solar cell devices. Solar cell modules comprising 16 serially connected cells were prepared with a total module active area of 96 cm2. The devices were tested for operational stability under simulated sunlight (AM1.5G) and natural sunlight, and the photochemical stability of the polymer was examined using a combination of UV−vis and IR spectroscopy.
    Original languageEnglish
    JournalMacromolecules
    Volume43
    Issue number19
    Pages (from-to)8115-8120
    ISSN0024-9297
    DOIs
    Publication statusPublished - 2010

    Bibliographical note

    This work was supported by the Danish
    Research Council for Technology and Production (FTP)
    (Reference No. 274-08-0057).

    Keywords

    • Polymer solar cells
    • Solar energy

    Fingerprint Dive into the research topics of 'Low Band Gap Polymers for Roll-to-Roll Coated Polymer Solar Cells'. Together they form a unique fingerprint.

    Cite this