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Advanced Materials

Direct Observation of Hole Accumulation in Polymer Solar Cells During Device Operation using Light-Induced Electron Spin Resonance

Authors

  • Tatsuya Nagamori,

    1. Division of Materials Science, University of Tsukuba, Tsukuba, Ibaraki 305-8573, Japan
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  • Kazuhiro Marumoto

    Corresponding author
    1. Division of Materials Science, University of Tsukuba, Tsukuba, Ibaraki 305-8573, Japan
    2. Japan Science and Technology Agency (JST), PRESTO, Kawaguchi, Saitama 322-0012, Japan
    • Division of Materials Science, University of Tsukuba, Tsukuba, Ibaraki 305-8573, Japan.
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Abstract

A clear correlation between the number of accumulated holes (Nspin) in poly(3-hexylthiophene) (P3HT) and the deterioration of the performance is observed in polymer solar cells under simulated solar irradiation. The sites of hole accumulation with deep trapping levels are formed at the interfaces between P3HT:[6,6]-phenyl C61-butyric acid methyl ester (PCBM) and poly(3,4-ethylenedioxythiophene):poly(4-styrenesulfonate) (PEDOT:PSS) layers.

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