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| Naji, M. |
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| Motta, Antonella |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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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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| Ali, M. A. |
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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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Kesters, Jurgen
Hasselt University
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (23/23 displayed)
- 2021Phosphonium-based polythiophene conjugated polyelectrolytes with different surfactant counterions: thermal properties, self-assembly and photovoltaic performancescitations
- 2020Phosphonium‐based polythiophene conjugated polyelectrolytes with different surfactant counterions: thermal properties, self‐assembly and photovoltaic performancescitations
- 2020Phosphonium-based polythiopheneconjugated polyelectrolytes with differentsurfactant counterions: thermal properties,self-assembly and photovoltaic performancescitations
- 2020Phosphonium-based polythiophene conjugated polyelectrolytes with different surfactant counterions: thermal properties, self-assembly and photovoltaic performances
- 2019Ladder-type high gap conjugated polymers based on indacenodithieno[3,2-b]thiophene and bithiazole for organic photovoltaicscitations
- 2018Organic and perovskite solar cells for space applicationscitations
- 2016High-Permittivity Conjugated Polyelectrolyte Interlayers for High-Performance Bulk Heterojunction Organic Solar Cellscitations
- 2016A stability study of polymer solar cells using conjugated polymers with different donor or acceptor side chain patternscitations
- 2016A stability study of polymer solar cells using conjugated polymers with different donor or acceptor side chain patternscitations
- 2015Fluorination as an effective tool to increase the open-circuit voltage and charge carrier mobility of organic solar cells based on poly(cyclopenta[2,1-b:3,4-b′]dithiophene-alt-quinoxaline) copolymerscitations
- 2015Enhanced Organic Solar Cell Stability by Polymer (PCPDTBT) Side Chain Functionalization
- 2015N-acyl-dithieno[3,2-b:2 ',3 '-d]pyrrole-based low bandgap copolymers affording improved open-circuit voltages and efficiencies in polymer solar cells
- 2015Fluorination as an effective tool to increase the open-circuit voltage and charge carrier mobility of organic solar cells based on poly(cyclopenta[2,1-b:3,4-b ']dithiophene-alt-quinoxaline) copolymerscitations
- 2015Combustion deposition of MoO3 films: from fundamentals to OPV applicationscitations
- 2015N-acyl-dithieno[3,2-b2',3'-d]pyrrole-based low bandgap copolymers affording improved open-circuit voltages and efficiencies in polymer solar cellscitations
- 2015Continuous Flow Polymer Synthesis toward Reproducible Large-Scale Production for Efficient Bulk Heterojunction Organic Solar Cellscitations
- 2014Fluorination as an effective tool to increase the open-circuit voltage and charge carrier mobility of organic solar cells based on poly(cyclopenta[2,1-b:3,4-b′]dithiophene-alt-quinoxaline) copolymerscitations
- 2014To combust or not to combust, that's the question
- 2014Enhanced open-circuit voltage in polymer solar cells by dithieno[3,2-b:2′,3′-d]pyrrole N-acylationcitations
- 2014Enhanced open-circuit voltage in polymer solar cells by dithieno[3,2-b:2 ',3 '-d]pyrrole N-acylationcitations
- 2013Ester-functionalized poly(3-alkylthiophene) copolymers: Synthesis, physicochemical characterization and performance in bulk heterojunction organic solar cellscitations
- 2013Ionic high-performance light harvesting and carrier transporting OPV materialscitations
- 2012Improved Photovoltaic Performance of a Semicrystalline Narrow Bandgap Copolymer Based on 4H-Cyclopenta[2,1-b:3,4-b ']dithiophene Donor and Thiazolo[5,4-d]thiazole Acceptor Unitscitations
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book
Fluorination as an effective tool to increase the open-circuit voltage and charge carrier mobility of organic solar cells based on poly(cyclopenta[2,1-b:3,4-b ']dithiophene-alt-quinoxaline) copolymers
Abstract
The effect of fluorination on the optoelectronic properties and the polymer : fullerene solar cell characteristics of PCPDTQx-type (poly{4-(2'-ethylhexyl)-4-octyl-4H-cyclopenta[2,1-b:3,4-b']-dithiophene-alt-2,3-bis[5'-(2 ''-ethylhexyl)thiophen-2'-yl]quinoxaline}) low bandgap copolymers is reported. The introduction of fluorine atoms on the quinoxaline constituents is an effective way to lower the HOMO and LUMO energy levels of the alternating copolymers, resulting in an enhanced open-circuit voltage for the devices based on the fluorinated polymers (similar to 0.1 V per F added). Furthermore, fluorination also improves the charge carrier mobility in the bulk heterojunction blends. Despite the formation of unfavorable photoactive layer morphologies, the best solar cell performance is obtained for the copolymer prepared from the difluorinated quinoxaline monomer, affording a power conversion efficiency of 5.26% under AM 1.5G irradiation, with an open-circuit voltage of 0.83 V, a short-circuit current density of 11.58 mA cm(-2) and a fill factor of 55%. ; This work was supported by the project ORGANEXT (EMR INT4-1.2-2009-04/054), selected in the frame of the operational program INTERREG IV-A Euregio Maas-Rijn, and the IAP 7/05 project FS2 (Functional Supramolecular Systems), granted by the Science Policy Office of the Belgian Federal Government (BELSPO). We are also grateful for financial support by the Research Programme of the Research Foundation - Flanders (FWO) (project G.0415.14N and M.ERA-NET project RADESOL). P. Verstappen, G. Heintges and T. Vangerven acknowledge the Agency for Innovation by Science and Technology in Flanders (IWT) for their PhD grants. J. Kesters and J. Drijkoningen thank Hasselt University for their PhD scholarships. The calculations were performed on the computing facilities of the Consortium des Equipements de Calcul Intensif (CECI), in particular those of the Plateforme Technologique de Calcul Intensif (PTCI) installed in the University of Namur, for which the authors acknowledge financial support of the FNRS-FRFC (Conventions no. 2.4.617.07.F and 2.5020.11) and the University of Namur. The authors are grateful to B. Van Mele, N. Van den Brande and M. Defour for the thermal analysis, and H. Penxten for the CV measurements. We further acknowledge Hercules for providing the funding for the LTQ Orbitrap Velos Pro mass spectrometer. Hasselt University and IMO-IMOMEC are partners within the Solliance network, the strategic alliance for research and development in the field of thin-film PV energy in the Eindhoven-Leuven-Aachen region.