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- W2556314279 abstract "The origin of photocurrent losses in the power‐generating regime of organic solar cells (OSCs) remains a controversial topic, although recent literature suggests that the competition between bimolecular recombination and charge extraction determines the bias dependence of the photocurrent. Here the steady‐state recombination dynamics is studied in bulk‐heterojunction OSCs with different hole mobilities from short‐circuit to maximum power point. It is shown that in this regime, in contrast to previous transient extracted charge and absorption spectroscopy studies, first‐order recombination outweighs bimolecular recombination of photogenerated charge carriers. This study demonstrates that the first‐order losses increase with decreasing slower carrier mobility, and attributes them to either mobilization of charges trapped at the donor:acceptor interface through the Poole–Frenkel effect, and/or recombination of photogenerated and injected charges. The dependence of both first‐order and higher‐order losses on the slower carrier mobility explains why the field dependence of OSC efficiencies has historically been attributed to charge‐extraction losses." @default.
- W2556314279 created "2016-11-30" @default.
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- W2556314279 date "2016-11-07" @default.
- W2556314279 modified "2023-09-27" @default.
- W2556314279 title "Electric Field and Mobility Dependent First-Order Recombination Losses in Organic Solar Cells" @default.
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- W2556314279 doi "https://doi.org/10.1002/aenm.201601379" @default.
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