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- W2324382697 abstract "We introduce a new and simple method to quantify the effective extraction mobility in organic solar cells at low electric fields and charge carrier densities comparable to operation conditions under one sun illumination. By comparing steady-state carrier densities at constant illumination intensity and under open-circuit conditions, the gradient of the quasi-Fermi potential driving the current is estimated as a function of external bias and charge density. These properties are then related to the respective steady-state current to determine the effective extraction mobility. The new technique is applied to different derivatives of the well-known low-band-gap polymer PCPDTBT blended with PC70BM. We show that the slower average extraction due to lower mobility accounts for the moderate fill factor when solar cells are fabricated with mono- or difluorinated PCPDTBT. This lower extraction competes with improved generation and reduced nongeminate recombination, rendering the monofluorinated derivative the most efficient donor polymer." @default.
- W2324382697 created "2016-06-24" @default.
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- W2324382697 date "2014-03-19" @default.
- W2324382697 modified "2023-10-16" @default.
- W2324382697 title "Quantifying Charge Extraction in Organic Solar Cells: The Case of Fluorinated PCPDTBT" @default.
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- W2324382697 doi "https://doi.org/10.1021/jz500457b" @default.
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