Oxygen- and water-induced degradation of an inverted polymer solar cell: the barrier effect

Morten Vesterager Madsen, Kion Norrman, Frederik C Krebs

    Research output: Contribution to journalJournal articleResearchpeer-review

    Abstract

    The work focuses on the degradation of performance induced by both water and oxygen in an inverted geometry organic photovoltaic device with emphasis on the accumulated barrier effect of the layers comprising the layer stack. By studying the exchange of oxygen in the zinc oxide (ZnO) layer, the barrier effect is reported in both a dry oxygen atmosphere and an oxygen-free humid atmosphere. The devices under study are comprised of a bulk heterojunction formed by poly(3-hexylthiophene) and [6,6]-phenyl-C61-butyric acid methyl ester sandwiched between a layer of zinc oxide (electron transporting layer) and a layer of poly(3,4-ethylenedioxythiophene) poly(styrenesulfonate) (hole transport layer) and the two electrodes indium tin oxide and silver. Time-of-flight secondary ion mass spectrometry is employed to characterize the accumulated barrier effect. A pronounced barrier effect is observed in the humid atmosphere, correlating well with a long observed lifetime in the same atmosphere.© 2011 Society of Photo-Optical Instrumentation Engineers.
    Original languageEnglish
    JournalJournal of Photonics for Energy
    Volume1
    Issue number1
    Pages (from-to)011104-6
    DOIs
    Publication statusPublished - 2011

    Bibliographical note

    This work was supported by the Danish Strategic Research Council (DSF 2104–05-0052 and
    2104–07-0022), EUDP (j. nr. 64009–0050) and PV ERA-NET transnational POLYMOL project
    PolyStaR.

    Keywords

    • electrochemical electrodes
    • oxygen
    • conducting polymers
    • indium compounds
    • II-VI semiconductors

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