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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Behrends, Jan
University of Freiburg
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (19/19 displayed)
- 2023Photogeneration of spin quintet triplet–triplet excitations in DNA-assembled pentacene stackscitations
- 2023Photogeneration of Spin Quintet Triplet–Triplet Excitations in DNA-Assembled Pentacene Stacks
- 2023Photogeneration of Spin Quintet Triplet-Triplet Excitations in DNA-Assembled Pentacene Stacks.
- 2022The fast and the capacious ; a [Ni(Salen)]‐TEMPO redox‐conducting polymer for organic batteries
- 2022Spins at work: probing charging and discharging of organic radical batteries by electron paramagnetic resonance spectroscopy
- 2022Deoxyribonucleic Acid Encoded and Size-Defined π-Stacking of Perylene Diimidescitations
- 2022Deoxyribonucleic Acid Encoded and Size-Defined π-Stacking of Perylene Diimides
- 2022Deoxyribonucleic Acid Encoded and Size-Defined π-Stacking of Perylene Diimides.
- 2021Spin–spin interactions and spin delocalisation in a doped organic semiconductor probed by EPR spectroscopycitations
- 2020Expedient paramagnetic properties of surfactant-free plasmonic silicon-based nanoparticles
- 2020Correlated donor/acceptor crystal orientation controls photocurrent generation in all-polymer solar cellscitations
- 2018Reaction of porphyrin-based surface-anchored metal-organic frameworks to prolonged illumination
- 2018Reaction of porphyrin-based surface-anchored metal–organic frameworks caused by prolonged illumination
- 2016Triplet excitons as sensitive spin probes for structure analysis of extended defects in microcrystalline silicon
- 2006High-resolution electrophysiology on a chip: Transient dynamics of alamethicin channel formation.citations
- 2004Ion channel drug discovery and research: the automated Nano-Patch-Clamp technology.citations
- 2003Microstructured apertures in planar glass substrates for ion channel research.citations
- 2003High quality ion channel analysis on a chip with the NPC technology.citations
- 2002Whole cell patch clamp recording performed on a planar glass chip.citations
Places of action
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article
Correlated donor/acceptor crystal orientation controls photocurrent generation in all-polymer solar cells
Abstract
New polymers with high electron mobilities have spurred research in organic solar cells using polymeric rather than fullerene acceptors due to their potential of increased diversity, stability, and scalability. However, all‐polymer solar cells have struggled to keep up with the steadily increasing power conversion efficiency of polymer:fullerene cells. The lack of knowledge about the dominant recombination process as well as the missing concluding picture on the role of the semi‐crystalline microstructure of conjugated polymers in the free charge carrier generation process impede a systematic optimization of all‐polymer solar cells. These issues are examined by combining structural and photo‐physical characterization on a series of poly(3‐hexylthiophene) (donor) and P(NDI2OD‐T2) (acceptor) blend devices. These experiments reveal that geminate recombination is the major loss channel for photo‐excited charge carriers. Advanced X‐ray and electron‐based studies reveal the effect of chloronaphthalene co‐solvent in reducing domain size, altering domain purity, and reorienting the acceptor polymer crystals to be coincident with those of the donor. This reorientation correlates well with the increased photocurrent from these devices. Thus, efficient split‐up of geminate pairs at polymer/polymer interfaces may necessitate correlated donor/acceptor crystal orientation, which represents an additional requirement compared to the isotropic fullerene acceptors.