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000817806 1001_ $$0P:(DE-Juel1)166075$$aKaienburg, Pascal$$b0
000817806 245__ $$aExtracting Information about the Electronic Quality of Organic Solar-Cell Absorbers from Fill Factor and Thickness
000817806 260__ $$aCollege Park, Md. [u.a.]$$bAmerican Physical Society$$c2016
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000817806 520__ $$aUnderstanding 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.
000817806 536__ $$0G:(DE-HGF)POF3-121$$a121 - Solar cells of the next generation (POF3-121)$$cPOF3-121$$fPOF III$$x0
000817806 536__ $$0G:(DE-Juel1)HITEC-20170406$$aHITEC - Helmholtz Interdisciplinary Doctoral Training in Energy and Climate Research (HITEC) (HITEC-20170406)$$cHITEC-20170406$$x1
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000817806 7001_ $$0P:(DE-Juel1)143905$$aRau, Uwe$$b1
000817806 7001_ $$0P:(DE-Juel1)159457$$aKirchartz, Thomas$$b2$$eCorresponding author
000817806 773__ $$0PERI:(DE-600)2760310-6$$a10.1103/PhysRevApplied.6.024001$$gVol. 6, no. 2, p. 024001$$n2$$p024001$$tPhysical review applied$$v6$$x2331-7019$$y2016
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