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Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/21549

Title: High-Permittivity Conjugated Polyelectrolyte Interlayers for High-Performance Bulk Heterojunction Organic Solar Cells
Authors: Kesters, Jurgen
Govaerts, Sanne
Pirotte, Geert
Drijkoningen, Jeroen
Chevrier, Michele
Van den Brande, Niko
Liu, Xianjie
Fahlman, Mats
Van Mele, Bruno
Lutsen, Laurence
Vanderzande, Dirk
Manca, Jean
Clement, Sebastien
Von Hauff, Elizabeth
Maes, Wouter
Issue Date: 2016
Citation: ACS APPLIED MATERIALS & INTERFACES, 8 (10), p. 6309-6314
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.
Notes: [Kesters, Jurgen; Govaerts, Sanne; Pirotte, Geert; Lutsen, Laurence; Vanderzande, Dirk; Maes, Wouter] Hasselt Univ, Inst Mat Res IMO, DSOS, Agoralaan 1 Bldg D, B-3590 Diepenbeek, Belgium. [Drijkoningen, Jeroen] Hasselt Univ, Inst Mat Res IMO, Elect & Phys Characterizat ELPHYC, Wetenschapspk 1, B-3590 Diepenbeek, Belgium. [Chevrier, Michele; Clement, Sebastien] Univ Montpellier, Inst Charles Gerhardt, Pl Eugene Bataillon, F-34095 Montpellier 05, France. [Chevrier, Michele] Univ Mons UMONS, Res Inst Sci & Engn Mat, Ctr Innovat Mat & Polymers, Lab Polymer & Composites Mat, 23 Ave Maistriau, B-7000 Mons, Belgium. [Van den Brande, Niko; Van Mele, Bruno] Vrije Univ Brussel, Phys Chem & Polymer Sci FYSC, Pleinlaan 2, B-1050 Brussels, Belgium. [Liu, Xianjie; Fahlman, Mats] Linkoping Univ, Div Surface Phys & Chem, IFM, SE-58183 Linkoping, Sweden. [Lutsen, Laurence; Vanderzande, Dirk; Maes, Wouter] Univ Hasselt, IMEC, IMOMEC, Univ Campus Wetenschapspk 1, B-3590 Diepenbeek, Belgium. [Manca, Jean] Hasselt Univ, X LaB, Agoralaan 1 Bldg D, B-3590 Diepenbeek, Belgium. [Von Hauff, Elizabeth] Vrije Univ Amsterdam, Dept Phys & Astron, Phys Energy, De Boelelaan 1105, NL-1081 HV Amsterdam, Netherlands.
URI: http://hdl.handle.net/1942/21549
DOI: 10.1021/acsami.6b00242
ISI #: 000372479300002
ISSN: 1944-8244
Category: A1
Type: Journal Contribution
Validation: ecoom, 2017
Appears in Collections: Research publications

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