| People | Locations | Statistics |
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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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Gruverman, Alexei
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (12/12 displayed)
- 2024Observation of Antiferroelectric Domain Walls in a Uniaxial Hyperferroelectriccitations
- 2024Observation of antiferroelectric domain walls in a uniaxial hyperferroelectriccitations
- 2024Observation of antiferroelectric domain walls in a uniaxial hyperferroelectriccitations
- 2024Observation of Antiferroelectric Domain Walls in a Uniaxial Hyperferroelectric.citations
- 2018Quasi-1D TiS 3 Nanoribbonscitations
- 2017Superdomain dynamics in ferroelectric-ferroelastic films: Switching, jamming and relaxationcitations
- 2017Superdomain dynamics in ferroelectric-ferroelastic films: Switching, jamming and relaxationcitations
- 2015Toward Ferroelectric Control of Monolayer MoS2citations
- 2015Nanomechanics of flexoelectric switchingcitations
- 2014Changing molecular band offsets in polymer blends of (P3HT/P(VDF-TrFE)) poly(3-hexylthiophene) and poly(vinylidene fluoride with trifluoroethylene) due to ferroelectric polingcitations
- 2012Understanding the effect of ferroelectric polarization on power conversion efficiency of organic photovoltaic devicescitations
- 2011Direct fabrication of arbitrary-shaped ferroelectric nanostructures on plastic, glass, and silicon substratescitations
Places of action
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article
Understanding the effect of ferroelectric polarization on power conversion efficiency of organic photovoltaic devices
Abstract
<p>It is demonstrated that the power conversion efficiency (PCE) of organic photovoltaic devices can be increased by inserting an ultrathin film of a ferroelectric co-polymer, poly(vinylidenefluoride-trifluoroethylene) (P(VDF-TrFE)), at the metal-organic interface, due to an enhancement of the charge extraction efficiency. Specifically, the effect of P(VDF-TrFE) crystallinity on its function in ferroelectric organic photovoltaic (FE-OPV) devices has been studied by several methods. Highly crystalline and amorphous P(VDF-TrFE) films have been prepared by the Langmuir-Blodgett method and spin-coating from acetone solution, respectively. The polymer solar cell devices with a crystalline P(VDF-TrFE) interfacial layer at the cathode have larger PCE than the structures with amorphous P(VDF-TrFE) and have the unique feature of switchable diode polarity and photovoltaic performance controlled by external applied voltage pulses. The obtained results confirm that the spontaneous polarization of the ferroelectric P(VDF-TrFE) layer is responsible for the enhancement of PCE in FE-OPV devices and that a highly crystalline ferroelectric polymer film is required to observe the enhancement of PCE. Amorphous P(VDF-TrFE) films act as regular dielectric layers with a little poling effect on device PCE. The polarization of P(VDF-TrFE) is shown to be stable, and the photogenerated charges could be collected efficiently by the cathode rather than being compensated.</p>