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| Home > Publications database > Extracting Information about the Electronic Quality of Organic Solar-Cell Absorbers from Fill Factor and Thickness |
| Home > Publications database > Extracting Information about the Electronic Quality of Organic Solar-Cell Absorbers from Fill Factor and Thickness |
| Journal Article | FZJ-2016-04445 |
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2016
American Physical Society
College Park, Md. [u.a.]
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Please use a persistent id in citations: http://hdl.handle.net/2128/12212 doi:10.1103/PhysRevApplied.6.024001
Abstract: Understanding the fill factor in organic solar cells remains challenging due to its complex dependence on a multitude of parameters. By means of drift-diffusion simulations, we thoroughly analyze the fill factor of such low-mobility systems and demonstrate its dependence on a collection coefficient defined in this work. We systematically discuss the effect of different recombination mechanisms, space-charge regions, and contact properties. Based on these findings, we are able to interpret the thickness dependence of the fill factor for different experimental studies from the literature. The presented model provides a facile method to extract the photoactive layer’s electronic quality which is of particular importance for the fill factor. We illustrate that over the past 15 years, the electronic quality has not been continuously improved, although organic solar-cell efficiencies increased steadily over the same period of time. Only recent reports show the synthesis of polymers for semiconducting films of high electronic quality that are able to produce new efficiency records.
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; Current Contents - Physical, Chemical and Earth Sciences ; IF < 5 ; JCR ; SCOPUS ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection
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