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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 | Publisher: | AMER CHEMICAL SOC | Source: | 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. | Keywords: | organic photovoltaics; cathode interlayers; conjugated polyelectrolytes; impedance spectroscopy; dielectric permittivity;organic photovoltaics; cathode interlayers; conjugated polyelectrolytes; impedance spectroscopy; dielectric permittivity | Document URI: | http://hdl.handle.net/1942/21549 | ISSN: | 1944-8244 | e-ISSN: | 1944-8252 | DOI: | 10.1021/acsami.6b00242 | ISI #: | 000372479300002 | Rights: | © 2016 American Chemical Society. | Category: | A1 | Type: | Journal Contribution | Validations: | ecoom 2017 |
Appears in Collections: | Research publications |
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acsami%2E6b00242.pdf Restricted Access | Published version | 1.42 MB | Adobe PDF | View/Open Request a copy |
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