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Tatsuya Nagamori and Kazuhiro Marumoto Direct Observation of Hole Accumulation in Polymer Solar Cells During Device Operation using Light-Induced Electron Spin Resonance Advanced Materials 25

Version of Record online: 27 FEB 2013 | DOI: 10.1002/adma.201204015

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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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