journal article·2016-03-16Open access

High-Permittivity Conjugated Polyelectrolyte Interlayers for High-Performance Bulk Heterojunction Organic Solar Cells

Jurgen Kesters, Sanne Govaerts, Geert Pirotte, Jeroen Drijkoningen, Michèle Chevrier, Niko Van den Brande, Xianjie Liu, Mats Fahlman, Bruno Van Mele, Laurence Lutsen, Dirk Vanderzande, Jean Manca, Sébastien Clément, Elizabeth Von Hauff, Wouter Maes

Abstract

Conjugated polyelectrolyte (CPE) interfacial layers present a powerful way to boost the I-V characteristics of organic photovoltaics. Nevertheless, clear guidelines with respect to the structure of high-performance interlayers are still lacking. In this work, impedance spectroscopy is applied to probe the dielectric permittivity of a series of polythiophene-based CPEs. The presence of ionic pendant groups grants the formation of a capacitive double layer, boosting the charge extraction and device efficiency. A counteracting effect is the diminishing affinity with the underlying photoactive layer. To balance these two effects, we found copolymer structures containing nonionic side chains to be beneficial.
Source: openalex_inverted_index · Quality: baseline

Research context

OpenAlex topics: Organic Electronics and Photovoltaics · Conducting polymers and applications · Perovskite Materials and Applications

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Institute for Materials Research (IMO)−Design & Synthesis of Organic Semiconductors (DSOS), Hasselt University, Agoralaan 1-Building D, B-3590 Diepenbeek, Belgium

Institute for Materials Research (IMO)−Electrical and Physical Characterization (ELPHYC), Hasselt University, Wetenschapspark 1, B-3590 Diepenbeek, Belgium

Institut Charles Gerhardt, Université de Montpellier, Place Eugène Bataillon, 34095 Montpellier Cedex 05, France

Laboratory for Polymeric and Composites Materials, Center for Innovation in Materials and Polymers, Research Institute for Science and Engineering of Materials, University of Mons (UMONS), 23 Avenue Maistriau, B-7000 Mons, Belgium

Physical Chemistry and Polymer Science (FYSC), Vrije Universiteit Brussel (VUB), Pleinlaan 2, B-1050 Brussels, Belgium

Division of Surface Physics and Chemistry, IFM, Linköping University, SE-58183 Linköping, Sweden

IMEC, IMOMEC, Universiteit Hasselt, Universitaire Campus−Wetenschapspark 1, B-3590 Diepenbeek, Belgium

X-LaB, Hasselt University, Agoralaan 1 - Building D, B-3590 Diepenbeek, Belgium

Physics of Energy, Department of Physics and Astronomy, Vrije Universiteit Amsterdam, De Boelelaan 1105, 1081 HV Amsterdam, The Netherlands

Funding

Vetenskapsr?det · Stichting voor Fundamenteel Onderzoek der Materie · Vrije Universiteit Brussel · Federaal Wetenschapsbeleid · Fonds Wetenschappelijk Onderzoek · Centre National de la Recherche Scientifique

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